/* index.css - Advanced Premium Design & Animations for WhatStack */
:root {
    --bg-dark: #020617;
    --card-bg: rgba(15, 23, 42, 0.4);
    --primary: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.2);
    --secondary: #818cf8;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --accent-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Background Gradients & Animations */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    width: 800px;
    height: 800px;
    filter: blur(120px);
    border-radius: 50%;
    opacity: 0.2;
    animation: float 25s infinite alternate ease-in-out;
}

.blob-1 { top: -200px; right: -200px; background: var(--primary-glow); }
.blob-2 { bottom: -200px; left: -200px; background: rgba(129, 140, 248, 0.15); animation-delay: -5s; }

@keyframes float {
    0% { transform: translate(0, 0) scale(1) rotate(0deg); }
    33% { transform: translate(100px, 50px) scale(1.1) rotate(10deg); }
    66% { transform: translate(-50px, 100px) scale(0.9) rotate(-10deg); }
    100% { transform: translate(0, 0) scale(1) rotate(0deg); }
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    padding: 1.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #fff;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo:hover { transform: scale(1.05); }

.logo span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s;
}

nav a:hover { color: var(--primary); }

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    text-align: center;
    animation: fadeInDown 1s ease-out;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.15);
    border-radius: 999px;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 2rem;
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(56, 189, 248, 0); }
    100% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

.hero h1 {
    font-size: 5.5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 2rem;
    letter-spacing: -0.05em;
    background: linear-gradient(to bottom, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero h1 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.35rem;
    color: var(--text-muted);
    max-width: 750px;
    margin: 0 auto 3.5rem;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.cta-button {
    display: inline-block;
    padding: 1.25rem 3rem;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    background: var(--accent-gradient);
    border-radius: 14px;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 20px -5px var(--primary-glow);
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 40px -10px var(--primary-glow);
}

.secondary-btn {
    display: inline-block;
    padding: 1.25rem 3rem;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.secondary-btn:hover { background: rgba(255, 255, 255, 0.08); }

/* Banner Showcase */
.banner-showcase {
    margin: 4rem 0 8rem;
    perspective: 2000px;
}

.window-frame {
    background: #020617;
    border-radius: 32px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.7);
    max-width: 1100px;
    margin: 0 auto;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    animation: fadeInUp 1.2s ease-out;
}

.window-frame:hover {
    transform: translateY(-10px) rotateX(2deg);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.window-controls {
    padding: 1.25rem;
    display: flex;
    gap: 10px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--glass-border);
}

.window-controls span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.window-controls span:nth-child(1) { background: #ff5f56; }
.window-controls span:nth-child(2) { background: #ffbd2e; }
.window-controls span:nth-child(3) { background: #27c93f; }

.hero-banner {
    width: 100%;
    display: block;
    transition: filter 0.5s ease;
}

/* Trust Bar */
.trust-bar {
    padding: 4rem 0 8rem;
    text-align: center;
}

.trust-bar p {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 3rem;
}

.logo-ticker {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    padding: 2rem 0;
}

.logo-ticker::before, .logo-ticker::after {
    content: '';
    position: absolute;
    top: 0;
    width: 250px;
    height: 100%;
    z-index: 2;
}

.logo-ticker::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-dark), transparent);
}

.logo-ticker::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-dark), transparent);
}

.logo-cloud {
    display: inline-flex;
    align-items: center;
    gap: 8rem;
    animation: scroll 30s linear infinite;
    opacity: 0.5;
}

@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.logo-cloud span {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    transition: opacity 0.3s;
}

.logo-cloud span:hover { opacity: 1; }

/* Sections Styling */
.section-header {
    text-align: center;
    margin-bottom: 6rem;
}

.section-header h2 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -0.04em;
    background: linear-gradient(to bottom, #fff, #64748b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.35rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Cards & Grids */
.feature-grid, .use-case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

@media (max-width: 900px) {
    .feature-grid, .use-case-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card, .use-case-card {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.4) 0%, rgba(15, 23, 42, 0.2) 100%);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    padding: 4rem 3rem;
    border-radius: 32px;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at top left, var(--primary-glow), transparent 70%);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: rgba(56, 189, 248, 0.4);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.6);
}

.feature-card:hover::before { opacity: 1; }

.feature-badge {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 800;
    padding: 0.3rem 0.8rem;
    border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.feature-card .icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feature-card:hover .icon { 
    transform: scale(1.1) rotate(5deg); 
    background: var(--primary);
    color: #fff;
    box-shadow: 0 0 20px var(--primary-glow);
}

.feature-card h3, .use-case-card h3 {
    font-size: 1.85rem;
    margin-bottom: 1.25rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.02em;
}

.feature-card p, .use-case-card p {
    color: var(--text-muted);
    font-size: 1.15rem;
    line-height: 1.6;
}

/* Use Cases Highlight */
.use-case-card.highlight {
    background: rgba(56, 189, 248, 0.05);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.use-case-card h3 { color: var(--primary); }

.check-list { list-style: none; margin-top: 2.5rem; }
.check-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-main);
    font-weight: 500;
}
.check-list li::before {
    content: '→';
    color: var(--primary);
    font-weight: 900;
}

/* Pricing */
.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.price-card {
    flex: 1;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 5rem 4rem;
    border-radius: 40px;
    text-align: center;
    position: relative;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.price-card.popular {
    border: 2px solid var(--primary);
    background: rgba(56, 189, 248, 0.05);
    transform: scale(1.05);
    z-index: 2;
}

.price-card:hover { transform: translateY(-10px) scale(1.02); }
.price-card.popular:hover { transform: translateY(-10px) scale(1.07); }

.popular-tag {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: var(--primary);
    color: var(--bg-dark);
    padding: 0.4rem 1.25rem;
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price {
    font-size: 5rem;
    font-weight: 950;
    margin: 2rem 0 3rem;
    letter-spacing: -0.05em;
}

.price span { font-size: 1.5rem; color: var(--text-muted); font-weight: 500; }

/* Feature Icons */
.feature-card .icon svg {
    width: 32px;
    height: 32px;
    stroke: currentColor;
}

/* Steps */
.how-it-works { position: relative; }

.steps-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.step-connector {
    position: absolute;
    top: 50px;
    left: 50px;
    right: 50px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.3), transparent);
    z-index: 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    position: relative;
    z-index: 1;
}

.step {
    position: relative;
    padding: 3rem;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.6) 0%, rgba(15, 23, 42, 0.3) 100%);
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    transition: transform 0.3s;
}

.step:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
}

.step-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-dark);
    margin-bottom: 2rem;
    box-shadow: 0 0 20px var(--primary-glow);
}

.step-icon svg {
    width: 24px;
    height: 24px;
}

.step-num {
    font-size: 6rem;
    font-weight: 950;
    color: rgba(255, 255, 255, 0.03);
    position: absolute;
    top: -2rem;
    right: 1.5rem;
    z-index: -1;
}

.step h3 { font-size: 1.5rem; margin-bottom: 1rem; color: #fff; }

/* Footer */
footer {
    padding: 10rem 0 4rem;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 8rem;
    margin-bottom: 8rem;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 2rem;
    font-size: 1.1rem;
    max-width: 380px;
}

.footer-links h4 {
    margin-bottom: 2.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #fff;
    opacity: 0.5;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 1rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 3rem;
}

@media (max-width: 1024px) {
    .hero h1 { font-size: 4rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 5rem; }
}

@media (max-width: 768px) {
    .pricing-grid { flex-direction: column; }
    .price-card.popular { transform: none; }
    .hero h1 { font-size: 3rem; }
    .logo-cloud { flex-wrap: wrap; gap: 3rem; }
}

/* Mockup Browser Styling */
.mockup-container {
    max-width: 1000px;
    margin: 4rem auto;
    perspective: 2000px;
}

.mockup-browser {
    background: #020617;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 40px 100px -20px rgba(0, 0, 0, 0.8);
    transform: rotateX(5deg);
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.mockup-browser:hover {
    transform: rotateX(0deg) translateY(-10px);
}

.mockup-header {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mockup-dots {
    display: flex;
    gap: 6px;
    margin-right: 1.5rem;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.mockup-dots span:nth-child(1) { background: #ff5f56; }
.mockup-dots span:nth-child(2) { background: #ffbd2e; }
.mockup-dots span:nth-child(3) { background: #27c93f; }

.mockup-address {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.35rem 1rem;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    flex: 1;
    max-width: 300px;
    text-align: center;
}

.mockup-content {
    padding: 2rem;
    position: relative;
    min-height: 400px;
    background: linear-gradient(135deg, #0f172a 0%, #020617 100%);
}

.content-skeleton {
    opacity: 0.2;
}

.skeleton-hero {
    height: 120px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.skeleton-grid span {
    height: 180px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

/* Floating Popup */
.mockup-popup {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 280px;
    background: #1e293b;
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: popupEntrance 1s cubic-bezier(0.23, 1, 0.32, 1) forwards;
    z-index: 10;
}

@keyframes popupEntrance {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.popup-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.popup-header strong {
    font-size: 0.95rem;
    color: #fff;
}

.popup-stats {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.popup-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.popup-item {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.popup-item span { margin-right: 0.5rem; }
.popup-item small { color: var(--text-muted); font-size: 0.7rem; }

/* PRO Modal */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(2, 6, 23, 0.95));
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: 24px;
    width: 90%;
    max-width: 450px;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 40px 100px -20px rgba(0, 0, 0, 0.8), 0 0 40px var(--primary-glow);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s;
}

.modal-close:hover {
    color: #fff;
}

.modal h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.modal p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-group input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: #fff;
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
}

.form-group input:focus {
    border-color: var(--primary);
    background: rgba(56, 189, 248, 0.05);
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.form-message {
    margin-top: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}
.form-message.error { color: #ef4444; }
.form-message.success { color: #10b981; }