/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors - Premium Dark Theme */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-bg-card: #16161f;
    --color-bg-card-hover: #1e1e2a;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #6b6b7b;
    
    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-accent-glow: rgba(99, 102, 241, 0.4);
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px var(--color-accent-glow);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Container */
    --container-max: 1200px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: var(--color-text-primary);
    box-shadow: 0 4px 15px var(--color-accent-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--color-accent-glow);
}

.btn--outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-hover);
}

.btn--outline:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.btn--full {
    width: 100%;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-telegram {
    display: inline-flex;
    color: #2aabee;
    transition: transform var(--transition-base), filter var(--transition-base);
}

.nav-telegram:hover {
    transform: scale(1.12);
    filter: drop-shadow(0 0 8px rgba(42, 171, 238, 0.6));
}

.logo-bracket {
    color: var(--color-accent-primary);
}

.logo-text {
    color: var(--color-text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link--cta {
    padding: 0.5rem 1rem;
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
    border-radius: var(--radius-md);
}

.nav-link--cta:hover {
    background: var(--color-accent-secondary);
    color: var(--color-text-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding: 100px 0 var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 4.6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    overflow-wrap: break-word;
}

.hero-title-line {
    display: block;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

.hero-description strong {
    color: var(--color-accent-primary);
}

.hero-ai {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 500px;
    padding: 0.75rem 1rem;
    margin-bottom: var(--spacing-lg);
    background:
        linear-gradient(var(--color-bg-card), var(--color-bg-card)) padding-box,
        linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary), var(--color-success)) border-box;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    text-align: left;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hero-ai:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--color-accent-glow);
}

.hero-ai strong {
    color: var(--color-text-primary);
}

.hero-ai-icon {
    flex-shrink: 0;
    font-size: 1.5rem;
}

.hero-ai-arrow {
    flex-shrink: 0;
    font-size: 1.25rem;
    color: var(--color-accent-primary);
    transition: transform var(--transition-base);
}

.hero-ai:hover .hero-ai-arrow {
    transform: translateX(4px);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Code Window */
.hero-visual {
    position: relative;
    min-width: 0;
}

.code-window {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.code-window-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-window-dot--red { background: #ff5f56; }
.code-window-dot--yellow { background: #ffbd2e; }
.code-window-dot--green { background: #27ca40; }

.code-window-title {
    margin-left: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.code-window-content {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-keyword { color: #c678dd; }
.code-class { color: #e5c07b; }
.code-variable { color: #e06c75; }
.code-string { color: #98c379; }
.code-function { color: #61afef; }
.code-comment { color: #5c6370; font-style: italic; }
.code-boolean { color: #d19a66; }

.hero-bg-gradient {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
    opacity: 0.5;
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
}

.about-link {
    color: var(--color-accent-primary);
    font-weight: 500;
    white-space: nowrap;
}

.about-link:hover {
    color: var(--color-accent-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.skill-icon {
    font-size: 1.25rem;
}

.skill-body {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.skill-name {
    font-weight: 600;
    color: var(--color-text-primary);
}

.skill-desc {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.about-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.about-card-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-card-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* ===================================
   Modules Section
   =================================== */
.modules {
    background: var(--color-bg-primary);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.module-card {
    position: relative;
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.module-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
}

/* Case (featured own module) */
.case {
    position: relative;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    background:
        radial-gradient(circle at 100% 0%, rgba(139, 92, 246, 0.16), transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(99, 102, 241, 0.12), transparent 50%),
        var(--color-bg-card);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.case-top {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.case-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    margin-bottom: var(--spacing-sm);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.case-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.case-lead {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.case-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Mock CRM card */
.case-preview {
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transform: rotate(1.5deg);
    transition: transform var(--transition-slow);
}

.case:hover .case-preview {
    transform: rotate(0deg);
}

.case-preview-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.875rem;
    font-weight: 600;
}

.case-preview-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
}

.case-preview-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0 var(--spacing-sm);
    padding: 0.75rem;
    margin-bottom: var(--spacing-xs);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.case-preview-row--live {
    border: 1px solid rgba(99, 102, 241, 0.5);
}

.case-preview-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.case-preview-value {
    grid-row: span 2;
    align-self: center;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent-primary);
}

.case-preview-note {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.case-preview-alert {
    margin-top: var(--spacing-sm);
    padding: 0.5rem 0.75rem;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.35);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--color-warning);
}

/* Problem → solution → result */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-md);
}

.case-step {
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.case-step--result {
    border-color: rgba(16, 185, 129, 0.4);
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.08), var(--color-bg-tertiary));
}

.case-step-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
}

.case-step--result .case-step-label {
    color: var(--color-success);
}

.case-benefits {
    list-style: none;
}

.case-benefits li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.375rem;
}

.case-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    font-weight: 700;
    color: var(--color-success);
}

.case-meta {
    margin-top: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ===== AI cases ===== */
.modules-subheader--ai {
    margin-top: var(--spacing-xl);
}

.ai-kicker {
    display: inline-block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent-primary);
}

.case--ai {
    margin-bottom: var(--spacing-lg);
}

.case-badge--live {
    color: var(--color-success);
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.4);
}

.case-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.case-stat {
    display: flex;
    flex-direction: column;
}

.case-stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* Chat mock */
.chat-preview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.chat-msg {
    max-width: 88%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    line-height: 1.5;
}

.chat-msg--user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-bottom-right-radius: 4px;
}

.chat-msg--bot {
    align-self: flex-start;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 4px;
    color: var(--color-text-secondary);
}

.chat-source {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--color-accent-primary);
}

.chat-typing {
    display: flex;
    gap: 4px;
    padding: 0.5rem 0.75rem;
}

.chat-typing span {
    width: 6px;
    height: 6px;
    background: var(--color-text-muted);
    border-radius: 50%;
    animation: chat-typing 1.2s infinite ease-in-out;
}

.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes chat-typing {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-3px); }
}

/* Smaller AI cases */
.ai-cases {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.ai-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: border-color var(--transition-base), transform var(--transition-base);
}

.ai-card:hover {
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-4px);
}

.ai-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.ai-card-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    font-size: 1.375rem;
    background: rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-md);
}

.ai-card-title {
    font-size: 1.1875rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
}

.ai-card .module-card-features {
    margin-top: auto;
    margin-bottom: 0;
}

/* Infrastructure */
.ai-infra {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    background: var(--color-bg-secondary);
    border: 1px dashed var(--color-border-hover);
    border-radius: var(--radius-xl);
}

.ai-infra-header {
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.ai-infra-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.ai-infra-text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.ai-flow {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: stretch;
    gap: var(--spacing-sm);
}

.ai-node {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.ai-node--core {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.25);
}

.ai-node-role {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.ai-node-name {
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-accent-primary);
}

.ai-node-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.ai-flow-arrow {
    align-self: center;
    font-size: 1.5rem;
    color: var(--color-accent-primary);
}

.ai-platform {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xs) var(--spacing-sm);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.14), rgba(139, 92, 246, 0.14));
    border: 1px solid rgba(99, 102, 241, 0.35);
    border-radius: var(--radius-lg);
    text-align: center;
}

.ai-platform-name {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-accent-primary);
}

.ai-platform-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

@media (prefers-reduced-motion: reduce) {
    .chat-typing span {
        animation: none;
    }
}

.modules-subheader {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modules-subtitle {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.modules-subtext {
    color: var(--color-text-secondary);
}

.module-card--featured {
    grid-column: span 2;
    border-color: var(--color-accent-primary);
}

.module-card-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 0.25rem 0.75rem;
    background: var(--color-accent-primary);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.module-card-badge + .module-card-header {
    margin-top: var(--spacing-md);
}

.module-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.module-card-icon {
    font-size: 1.5rem;
}

.module-card-icon--large {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.module-card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.module-card-description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
}

.module-card-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.module-feature {
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.module-card-footer {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.module-card-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent-primary);
}

.module-card-link:hover {
    color: var(--color-accent-secondary);
}

.module-card--contact {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-tertiary));
}

.module-card-content-center {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    background: var(--color-bg-secondary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-accent-primary);
    border-radius: 50%;
}

.timeline-content {
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.timeline-period {
    display: inline-block;
    font-size: 0.8125rem;
    color: var(--color-accent-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.timeline-list {
    list-style: disc;
    padding-left: var(--spacing-md);
}

.timeline-list li {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xs);
}

/* ===================================
   Blog Section
   =================================== */
.blog {
    background: var(--color-bg-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.blog-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-lg);
}

.blog-card-image {
    height: 180px;
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-placeholder {
    font-size: 4rem;
    opacity: 0.5;
}

.blog-card-content {
    padding: var(--spacing-md);
}

.blog-card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.blog-card-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.blog-card-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.blog-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.blog-empty {
    max-width: 560px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px dashed var(--color-border-hover);
    border-radius: var(--radius-lg);
    text-align: center;
}

.blog-empty-icon {
    display: block;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.blog-empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.blog-empty-text {
    color: var(--color-text-secondary);
}

.blog-empty-text a {
    color: var(--color-accent-primary);
    font-weight: 500;
}

/* ===================================
   Terms Section
   =================================== */
.terms {
    background: var(--color-bg-secondary);
    position: relative;
    overflow: hidden;
}

/* Offer: price + perks */
.terms-offer {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    background:
        radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.18), transparent 55%),
        var(--color-bg-card);
    border: 1px solid rgba(99, 102, 241, 0.35);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.terms-price {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-sm);
}

.terms-price-label {
    font-size: 0.8125rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.terms-price-value {
    font-size: clamp(2.25rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.terms-price-value small {
    font-size: 0.5em;
    font-weight: 600;
}

.terms-price-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.terms-perks {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-sm);
    list-style: none;
}

.terms-perk {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-base), transform var(--transition-base);
}

.terms-perk:hover {
    border-color: var(--color-accent-primary);
    transform: translateX(4px);
}

.terms-perk-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.25rem;
    background: rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-md);
}

.terms-perk-title {
    display: block;
    font-weight: 600;
}

.terms-perk-text {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Steps: chain of beads */
.terms-steps-heading {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.terms-steps {
    --bead-size: 64px;
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--spacing-md);
    list-style: none;
}

/* The thread connecting beads */
.terms-steps::before {
    content: '';
    position: absolute;
    top: calc(var(--bead-size) / 2 - 1px);
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    opacity: 0.5;
}

/* Glowing spark running along the thread */
.terms-steps::after {
    content: '';
    position: absolute;
    top: calc(var(--bead-size) / 2 - 4px);
    left: 10%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-primary);
    box-shadow: 0 0 12px 4px var(--color-accent-glow);
    animation: terms-spark 5s linear infinite;
}

@keyframes terms-spark {
    from { left: 10%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    to { left: 90%; opacity: 0; }
}

.terms-step {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.terms-step-bead {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--bead-size);
    height: var(--bead-size);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.25), transparent 45%),
        var(--color-bg-tertiary);
    border: 2px solid var(--color-accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 6px var(--color-bg-secondary), 0 0 20px var(--color-accent-glow);
    transition: transform var(--transition-base), background var(--transition-base);
}

.terms-step:first-child .terms-step-bead,
.terms-step:hover .terms-step-bead {
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.35), transparent 45%),
        linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    transform: scale(1.08);
}

.terms-step-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.terms-step-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Beads appear one after another */
.terms-step.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.terms-step.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.terms-step.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.terms-step.animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }

.terms-cta {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.terms-cta-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

@media (prefers-reduced-motion: reduce) {
    .terms-steps::after {
        display: none;
    }
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--color-bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 0.9375rem;
    color: var(--color-text-primary);
}

.contact-value:hover {
    color: var(--color-accent-primary);
}

/* Form */
.contact-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--spacing-lg);
    align-items: start;
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.contact-form > .form-section-title,
.contact-form > button {
    grid-column: 1 / -1;
}

.contact-form > button {
    justify-self: center;
    max-width: 360px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-textarea--sm {
    min-height: 88px;
}

.form-input[type="date"] {
    color-scheme: dark;
}

.form-required {
    color: var(--color-accent-primary);
}

.form-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-sm);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-bg-primary);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.footer-links a:hover {
    color: var(--color-text-primary);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
}

.footer-bottom {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .case-top {
        grid-template-columns: minmax(0, 1fr);
    }

    .case-preview {
        max-width: 460px;
        transform: none;
    }

    .case-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .chat-preview {
        max-width: 460px;
    }

    .hero-container {
        grid-template-columns: minmax(0, 1fr);
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-visual {
        width: 100%;
        max-width: 500px;
        margin: 0 auto;
        text-align: left;
    }
    
    .hero-description {
        max-width: none;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-cards {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .about-card {
        flex: 1;
        min-width: 150px;
    }
    
    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .module-card--featured {
        grid-column: span 1;
    }
    
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .terms-offer {
        grid-template-columns: minmax(0, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        min-height: auto;
        padding: 96px 0 var(--spacing-xl);
    }
    
    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        max-width: 360px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
    
    .code-window-content {
        padding: var(--spacing-sm);
        font-size: 0.75rem;
        line-height: 1.6;
    }
    
    .hero-bg-gradient {
        width: 100%;
        height: 400px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .terms-offer {
        padding: var(--spacing-md);
    }

    .contact-form {
        grid-template-columns: minmax(0, 1fr);
        padding: var(--spacing-md);
    }

    .case {
        padding: var(--spacing-md);
    }

    .case-actions {
        flex-direction: column;
    }

    .ai-cases {
        grid-template-columns: minmax(0, 1fr);
    }

    .ai-infra {
        padding: var(--spacing-md);
    }

    .ai-flow {
        grid-template-columns: minmax(0, 1fr);
    }

    .ai-flow-arrow {
        justify-self: center;
        transform: rotate(90deg);
    }

    .terms-steps {
        --bead-size: 52px;
        grid-template-columns: minmax(0, 1fr);
        gap: var(--spacing-lg);
    }

    .terms-steps::before,
    .terms-steps::after {
        display: none;
    }

    .terms-step:not(:last-child)::before {
        content: '';
        position: absolute;
        z-index: -1;
        top: var(--bead-size);
        bottom: calc(-1 * var(--spacing-lg));
        left: calc(var(--bead-size) / 2 - 1px);
        width: 2px;
        background: linear-gradient(180deg, var(--color-accent-primary), var(--color-accent-secondary));
        opacity: 0.5;
    }

    .terms-step {
        flex-direction: row;
        align-items: flex-start;
        gap: var(--spacing-md);
        text-align: left;
    }

    .terms-step-bead {
        flex-shrink: 0;
        margin-bottom: 0;
        font-size: 1.0625rem;
    }

    .terms-step-body {
        padding-top: 0.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero {
        padding-top: 88px;
    }
    
    .hero-badge {
        font-size: 0.8125rem;
    }
    
    .hero-stats {
        flex-wrap: nowrap;
        justify-content: space-around;
        gap: var(--spacing-sm);
    }
    
    .stat {
        flex: 1;
        min-width: 0;
        align-items: center;
        text-align: center;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .code-window-content {
        font-size: 0.6875rem;
    }
    
    .about-cards {
        flex-direction: column;
    }

    .form-row {
        grid-template-columns: minmax(0, 1fr);
        gap: 0;
    }

    .logo {
        font-size: 1.25rem;
    }

    .case-preview-row {
        grid-template-columns: minmax(0, 1fr);
    }

    .case-preview-value {
        grid-row: auto;
    }

    .nav-brand {
        gap: 0.5rem;
    }
    
    .about-card {
        min-width: 100%;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: -10px;
    }
    
    .timeline-marker {
        left: -16px;
    }
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Selection */
::selection {
    background: var(--color-accent-primary);
    color: var(--color-text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-hover);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-primary);
}