/* ==========================================
   PontAI Landing Page Styles
   Modern warm theme - sales focused
   ========================================== */

:root {
    /* Colors - Stripe-inspired palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    
    --text-primary: #f5f5f7;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    
    /* Stripe purple gradient */
    --accent: #635bff;
    --accent-secondary: #80e9ff;
    --accent-glow: rgba(99, 91, 255, 0.25);
    --accent-dark: #5851ea;
    
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Success color */
    --success: #00d4aa;
    
    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

/* ==========================================
   Reset & Base
   ========================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ==========================================
   Animated Background
   ========================================== */

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: -2;
}

.bg-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 30% 30%, rgba(99, 91, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(128, 233, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: glowMove 25s ease-in-out infinite;
}

@keyframes glowMove {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(5%, 3%); }
    50% { transform: translate(-3%, 5%); }
    75% { transform: translate(-5%, -3%); }
}

/* ==========================================
   Container & Layout
   ========================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ==========================================
   Navigation
   ========================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
    backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.85);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent);
    animation: iconPulse 3s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    padding: var(--space-3xl) var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Chat Demo Visual */
.hero-visual {
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.chat-demo {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 
        0 25px 60px rgba(0, 0, 0, 0.4),
        0 0 80px var(--accent-glow);
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.chat-info {
    display: flex;
    flex-direction: column;
}

.chat-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.chat-status {
    font-size: 0.8rem;
    color: var(--success);
}

.chat-messages {
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    min-height: 280px;
}

.chat-message {
    max-width: 85%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    animation: messageIn 0.4s ease backwards;
}

.chat-message:nth-child(1) { animation-delay: 0.5s; }
.chat-message:nth-child(2) { animation-delay: 1s; }
.chat-message:nth-child(3) { animation-delay: 1.5s; }
.chat-message:nth-child(4) { animation-delay: 2s; }

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message.user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: white;
}

.chat-message.assistant {
    align-self: flex-start;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.chat-message p {
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.chat-footer {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border);
}

.chat-typing {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

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

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

.chat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================
   Social Proof Section
   ========================================== */

.social-proof {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.social-proof .container {
    text-align: center;
}

.proof-text {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.proof-logos {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.proof-item {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-muted);
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.proof-item:hover {
    opacity: 1;
}

/* ==========================================
   Sections Common
   ========================================== */

section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(99, 91, 255, 0.15);
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   Benefits Section
   ========================================== */

.benefits {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.benefit-card {
    padding: var(--space-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.benefit-card:hover {
    border-color: rgba(99, 91, 255, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.benefit-card.highlight {
    border-color: rgba(99, 91, 255, 0.3);
    background: linear-gradient(135deg, rgba(99, 91, 255, 0.08), rgba(128, 233, 255, 0.04));
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.benefit-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ==========================================
   How it Works
   ========================================== */

.steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--border);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.6;
    line-height: 1;
    min-width: 80px;
}

.step-content h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   Use Cases Section
   ========================================== */

.use-cases {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
}

.case-item {
    text-align: center;
    padding: var(--space-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.case-item:hover {
    border-color: rgba(99, 91, 255, 0.4);
    transform: translateY(-2px);
}

.case-item.highlight {
    border-color: rgba(99, 91, 255, 0.3);
    background: linear-gradient(135deg, rgba(99, 91, 255, 0.08), rgba(128, 233, 255, 0.04));
}

.case-emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.case-item h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.case-item p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* ==========================================
   Case Study Preview
   ========================================== */

.case-preview {
    padding: var(--space-2xl) 0;
}

.case-preview-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: linear-gradient(135deg, rgba(99, 91, 255, 0.08), rgba(128, 233, 255, 0.04));
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: border-color var(--transition-base);
}

.case-preview-card:hover {
    border-color: rgba(99, 91, 255, 0.4);
}

.case-preview-content h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin: var(--space-xs) 0 var(--space-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-preview-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    max-width: 450px;
    line-height: 1.6;
}

.case-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.highlight-item {
    font-size: 0.9rem;
    color: var(--success);
    background: rgba(0, 212, 170, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.case-preview-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.preview-badge {
    font-size: 5rem;
    line-height: 1;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.preview-label {
    font-size: 0.875rem;
    color: var(--accent);
    background: rgba(99, 91, 255, 0.15);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-xl);
}

/* ==========================================
   CTA Section
   ========================================== */

.cta {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.cta p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-size: 1.1rem;
}

.cta-form {
    display: flex;
    gap: var(--space-sm);
    max-width: 500px;
    margin: 0 auto var(--space-sm);
}

.cta-form input {
    flex: 1;
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.cta-form input:focus {
    border-color: var(--accent);
}

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

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

/* ==========================================
   Footer
   ========================================== */

.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: var(--space-2xl);
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-visual {
        order: -1;
        max-width: 450px;
        margin: 0 auto;
    }
    
    .nav-links {
        display: none;
    }
    
    .case-preview-card {
        flex-direction: column;
        text-align: center;
    }
    
    .case-preview-content p {
        max-width: none;
    }
    
    .case-preview-visual {
        order: -1;
    }
    
    .case-highlights {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .footer-links {
        gap: var(--space-xl);
    }
    
    .step {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .step-number {
        font-size: 2rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}