/* ============================================
   CSS Variables - Dark Theme (Default)
   ============================================ */
:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #6b7280;
    --accent-primary: #3b82f6;
    --accent-secondary: #2563eb;
    --accent-hover: #60a5fa;
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);
    --gradient-1: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-2: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

/* Light Theme */
.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --accent-primary: #2563eb;
    --accent-secondary: #3b82f6;
    --accent-hover: #1d4ed8;
    --border-color: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Theme Toggle
   ============================================ */
.theme-toggle {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
}

.theme-icon-light {
    display: none;
}

.light-theme .theme-icon-dark {
    display: none;
}

.light-theme .theme-icon-light {
    display: block;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.light-theme .navbar {
    background: rgba(255, 255, 255, 0.95);
}

.navbar-scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-text {
    width: 32px;
    height: 32px;
    background: var(--gradient-1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #ffffff;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--gradient-1);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 60px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -250px;
    left: -250px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: -200px;
    right: -200px;
    animation-delay: 5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-hover);
    top: 50%;
    right: 10%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.hero-description {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-sub-description {
    font-size: 18px;
    color: var(--text-tertiary);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.hero-feature {
    text-align: left;
    background: var(--bg-card);
    border-radius: 18px;
    padding: 20px 18px 18px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.hero-feature i {
    color: var(--accent-primary);
    font-size: 24px;
    margin-bottom: 12px;
}

.hero-feature span {
    display: block;
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.hero-feature small {
    color: var(--text-tertiary);
    font-size: 14px;
    line-height: 1.6;
    display: block;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-tertiary);
    font-size: 20px;
    animation: bounce 2s infinite;
}

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

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-align: center;
}

.section-description {
    font-size: 18px;
    color: var(--text-tertiary);
    line-height: 1.8;
    text-align: center;
}

.section-footer {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 40px;
    justify-content: center;
}

.footer-note {
    color: var(--text-tertiary);
    font-size: 15px;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    padding: 32px 24px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #ffffff;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-tertiary);
    font-size: 15px;
    line-height: 1.7;
}

/* ============================================
   Professional Section
   ============================================ */
.professional-section {
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.22), transparent 55%),
                radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.18), transparent 55%),
                var(--bg-primary);
    padding: 96px 0;
}

.professional-content {
    max-width: 1040px;
    margin: 0 auto;
}

.professional-content .section-title {
    font-size: 32px;
    letter-spacing: -0.03em;
}

.professional-content .section-description {
    max-width: 640px;
    margin-top: 12px;
    color: var(--text-tertiary);
}

/* Ensure the 'Professional, yet powerful' subtitle is centered and constrained */
.professional-section .section-description {
    text-align: center;
    margin: 12px auto 0;
    max-width: 780px;
}

.professional-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.professional-card {
    position: relative;
    background: var(--bg-card);
    padding: 24px 22px 22px;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.22);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.professional-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 50%);
    pointer-events: none;
}

.light-theme .professional-card {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

.professional-card-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.professional-card-icon {
    position: relative;
    z-index: 1;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.25);
    flex-shrink: 0;
}

.professional-card-icon i {
    font-size: 18px;
    color: var(--accent-primary);
}

.professional-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.professional-card p {
    margin: 0;
    color: var(--text-tertiary);
    line-height: 1.65;
    font-size: 14px;
}

@media (max-width: 900px) {
    .professional-section {
        padding: 72px 0;
    }

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

/* ============================================
   Built Section
   ============================================ */
.built-section {
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.18), transparent 60%),
        radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.14), transparent 60%),
        var(--bg-primary);
    padding: 96px 0;
}

.built-section .section-header {
    max-width: 640px;
}

.built-layout {
    margin-top: 40px;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 40px;
    align-items: stretch;
}

.built-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.built-card {
    position: relative;
    background: var(--bg-card);
    border-radius: 18px;
    padding: 22px 20px 18px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.25);
    overflow: hidden;
}

.built-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.16), transparent 55%);
    opacity: 0.8;
    pointer-events: none;
}

.built-card-inner {
    position: relative;
    z-index: 1;
}

.built-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.built-card p {
    color: var(--text-tertiary);
    font-size: 15px;
    line-height: 1.7;
}

.featured-build {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: var(--bg-card);
    border-radius: 24px;
    padding: 48px;
    border: 1px solid var(--border-color);
}

.featured-label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
    margin-bottom: 16px;
    display: block;
}

.featured-content h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.featured-content p {
    color: var(--text-tertiary);
    font-size: 18px;
    margin-bottom: 32px;
    line-height: 1.7;
}

.featured-links {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.also-see {
    color: var(--text-tertiary);
    font-size: 15px;
}

.also-see a {
    color: var(--accent-primary);
    text-decoration: none;
}

.featured-visual .visual-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-dots {
    display: flex;
    gap: 6px;
}

.card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.card-dots span:nth-child(1) { background: #ff5f57; }
.card-dots span:nth-child(2) { background: #ffbd2e; }
.card-dots span:nth-child(3) { background: #28ca42; }

.card-content {
    padding: 48px 32px;
    text-align: center;
}

.preview-content i {
    font-size: 48px;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.preview-content h4 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.preview-content p {
    color: var(--text-tertiary);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--bg-primary);
    padding: 56px 0;
}

.contact-header {
    text-align: center;
    margin-bottom: 20px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 24px;
}

.contact-form-wrapper {
    background: var(--bg-card);
    padding: 22px 22px 18px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-note {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-tertiary);
}

.form-note a {
    color: var(--accent-primary);
    text-decoration: none;
}

.contact-info {
    background: var(--bg-card);
    padding: 22px 22px 18px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.contact-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-info p {
    color: var(--text-tertiary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.company-links {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.company-links a {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 15px;
}

.company-links a:hover {
    text-decoration: underline;
}

.capabilities ul {
    list-style: none;
}

.capabilities li {
    color: var(--text-tertiary);
    margin-bottom: 12px;
    font-size: 15px;
    padding-left: 20px;
    position: relative;
}

.capabilities li::before {
    content: "•";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-main p {
    color: var(--text-tertiary);
    font-size: 14px;
}

.footer-credit a {
    color: var(--accent-primary);
    text-decoration: none;
}

.footer-credit a:hover {
    text-decoration: underline;
}

/* ============================================
   Modal
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    padding: 48px;
    border-radius: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    position: relative;
}

.close-modal {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 28px;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.modal-content p {
    color: var(--text-tertiary);
    margin-bottom: 32px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .features-grid,
    .built-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 968px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero-features {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-feature {
        text-align: center;
    }

    .professional-grid {
        grid-template-columns: 1fr;
    }

    .featured-build {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 32px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 100px 0 40px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-description {
        font-size: 20px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .features-grid,
    .built-grid {
        grid-template-columns: 1fr;
    }

    .section-footer {
        flex-direction: column;
        align-items: center;
    }

    .featured-links {
        flex-direction: column;
    }

    .footer-main {
        flex-direction: column;
        text-align: center;
    }

    .theme-toggle {
        top: 16px;
        right: 16px;
        width: 44px;
        height: 44px;
    }
}

/* Mobile Menu */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        backdrop-filter: blur(20px);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
}