/* ==========================================================================
   BrickTrack Web Portal - Core Design System & Styles
   Aesthetics: Glassmorphism, Vibrant Dark Mode, HSL Color Palette, Micro-Animations
   Brand: BrickTrack by HastRadar (https://hastradar.com)
   ========================================================================== */

:root {
    --bg-dark: #090d14;
    --bg-surface: #101726;
    --bg-card: rgba(22, 31, 48, 0.7);
    --bg-card-hover: rgba(30, 42, 64, 0.85);

    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(0, 168, 150, 0.4);

    --primary-teal: #00a896;
    --primary-teal-glow: rgba(0, 168, 150, 0.3);
    --secondary-emerald: #10b981;
    --accent-gold: #ffb703;
    --accent-orange: #f97316;

    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

    --glass-blur: blur(16px);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    color: var(--primary-teal);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--secondary-emerald);
}

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

/* Typography & Badges */
.gradient-text {
    background: linear-gradient(135deg, #ffffff 20%, var(--primary-teal) 60%, var(--secondary-emerald) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gold-text {
    color: var(--accent-gold);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(0, 168, 150, 0.12);
    border: 1px solid rgba(0, 168, 150, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-teal);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 3rem auto;
}

/* Header & Brand Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(9, 13, 20, 0.85);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    padding: 0.8rem 0;
    transition: all var(--transition-smooth);
}

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

.brand-logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.brand-logo-img {
    height: 48px;
    width: auto;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.4));
}

.brand-logo-link:hover {
    transform: scale(1.03);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.8rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.6rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-teal), var(--secondary-emerald));
    color: #ffffff;
    box-shadow: 0 4px 20px var(--primary-teal-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 168, 150, 0.5);
    color: #ffffff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 9rem 0 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, rgba(0, 168, 150, 0.18) 0%, rgba(9, 13, 20, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.1rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.2rem;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.stat-item h4 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.hero-mockup-container {
    position: relative;
}

.hero-mockup-img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px var(--primary-teal-glow);
    transition: transform var(--transition-smooth);
}

.hero-mockup-img:hover {
    transform: scale(1.02);
}

/* Features Grid */
.features-section {
    padding: 6rem 0;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: left;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-6px);
    background: var(--bg-card-hover);
    border-color: var(--border-highlight);
    box-shadow: 0 12px 30px rgba(0, 168, 150, 0.15);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 168, 150, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.2rem;
    color: var(--primary-teal);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

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

/* Interactive App Showcase Tabs */
.showcase-section {
    padding: 6rem 0;
    background: var(--bg-surface);
    border-y: 1px solid var(--border-color);
    text-align: center;
}

.showcase-tabs {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.tab-btn {
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn.active, .tab-btn:hover {
    background: var(--primary-teal);
    color: #fff;
    border-color: var(--primary-teal);
    box-shadow: 0 4px 16px var(--primary-teal-glow);
}

.showcase-display {
    max-width: 1050px;
    margin: 0 auto;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: left;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-smooth);
}

.tab-content.active {
    display: block;
}

.showcase-tab-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 850px) {
    .showcase-tab-grid {
        grid-template-columns: 1fr;
    }
}

.showcase-tab-info h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
}

.showcase-tab-info p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-bullets {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem 0;
}

.feature-bullets li {
    padding: 0.6rem 0;
    color: var(--text-primary);
    font-size: 0.98rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
}

.feature-bullets li:last-child {
    border-bottom: none;
}

/* Phone Mockup Frame */
.phone-mockup-frame {
    position: relative;
    width: 100%;
    max-width: 290px;
    margin: 0 auto;
    border-radius: 34px;
    padding: 9px;
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 2px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.75), 0 0 30px rgba(0, 168, 150, 0.25);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.phone-mockup-frame:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.85), 0 0 35px rgba(249, 115, 22, 0.35);
}

.phone-screen-img {
    width: 100%;
    height: auto;
    border-radius: 26px;
    display: block;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* Hero Phone Composition */
.hero-phone-composition {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 480px;
}

.hero-phone-primary {
    position: relative;
    z-index: 2;
    width: 270px;
}

.hero-phone-secondary {
    position: absolute;
    right: 15px;
    top: 30px;
    z-index: 1;
    width: 240px;
    opacity: 0.85;
    transform: rotate(6deg) scale(0.92);
    filter: blur(0.5px);
    transition: all var(--transition-medium);
}

.hero-phone-composition:hover .hero-phone-secondary {
    transform: rotate(8deg) translateX(15px) scale(0.95);
    opacity: 0.95;
}

/* App Gallery Grid Section */
.gallery-section {
    padding: 6rem 0;
    background: var(--bg-dark);
    text-align: center;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.gallery-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-medium);
}

.gallery-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-teal);
    box-shadow: 0 20px 40px rgba(0, 168, 150, 0.2);
}

.gallery-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    margin-top: 1.2rem;
    margin-bottom: 0.4rem;
}

.gallery-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* Pricing Section */
.pricing-section {
    padding: 6rem 0;
    text-align: center;
}

.pricing-toggle {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.3rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.toggle-option {
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.toggle-option.active {
    background: var(--primary-teal);
    color: #fff;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: stretch;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.5rem 2rem;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition-smooth);
}

.pricing-card.featured {
    border-color: var(--primary-teal);
    background: rgba(0, 168, 150, 0.06);
    box-shadow: 0 10px 30px var(--primary-teal-glow);
    transform: scale(1.03);
}

.pricing-badge {
    align-self: flex-start;
    background: var(--accent-gold);
    color: #000;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.price-title {
    font-size: 1.4rem;
    font-weight: 700;
}

.price-amount {
    font-size: 2.4rem;
    font-weight: 800;
    margin: 0.8rem 0;
    color: var(--text-primary);
}

.price-features {
    list-style: none;
    margin: 1.5rem 0 2rem 0;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
}

/* FAQ Accordion */
.faq-section {
    padding: 6rem 0;
    background: var(--bg-surface);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.2rem 1.5rem;
    font-weight: 700;
    font-size: 1.05rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.faq-answer {
    padding: 0 1.5rem 1.2rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

/* Download & QR Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn var(--transition-fast);
}

.download-modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    padding: 2.5rem;
    text-align: center;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 168, 150, 0.3);
}

.modal-close-btn {
    position: absolute;
    top: 1rem;
    right: 1.2rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

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

.qr-code-box {
    background: #ffffff;
    padding: 1.2rem;
    border-radius: var(--radius-md);
    display: inline-block;
    margin: 1.5rem 0;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.qr-code-svg {
    width: 180px;
    height: 180px;
}

/* Footer */
footer {
    background: #05080d;
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem 0;
    color: var(--text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1.2rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.6rem;
}

.footer-col a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-toggle { display: block; }
    .section-title { font-size: 2rem; }
    .hero-content h1 { font-size: 2.2rem; }
    .pricing-card.featured { transform: none; }
    .footer-grid { grid-template-columns: 1fr; }
}