/* ==========================================================================
   Base & Variables
   ========================================================================== */
:root {
    /* Colors */
    --c-primary: #0f172a; /* Dark Navy / Anthracite */
    --c-primary-hover: #1e293b;
    --c-accent: #3b82f6; /* Modern Blue */
    --c-text-main: #334155;
    --c-text-light: #64748b;
    --c-bg-main: #ffffff;
    --c-bg-alt: #f8fafc;
    --c-border: #e2e8f0;
    
    /* Typography */
    --f-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing & Layout */
    --container-width: 1200px;
    --section-padding: 100px 0;
    --section-padding-mobile: 60px 0;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: var(--f-sans);
    color: var(--c-text-main);
    background-color: var(--c-bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-bg {
    background-color: var(--c-bg-alt);
}

section {
    padding: var(--section-padding);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    color: var(--c-primary);
    font-weight: 600;
    line-height: 1.2;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--c-text-light);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background-color: var(--c-primary);
    color: #ffffff;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--c-primary);
    border-color: var(--c-border);
}

.btn-secondary:hover {
    border-color: var(--c-primary);
    background-color: var(--c-bg-alt);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
    padding: 20px 0;
}

.header.scrolled {
    padding: 16px 0;
    border-bottom-color: var(--c-border);
    box-shadow: var(--shadow-sm);
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--c-primary);
    letter-spacing: -0.01em;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--c-text-main);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--c-primary);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--c-primary);
    left: 0;
    transition: var(--transition);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.menu-toggle.active .hamburger { background-color: transparent; }
.menu-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
.menu-toggle.active .hamburger::after { bottom: 0; transform: rotate(-45deg); }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    padding-top: 160px;
    padding-bottom: 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--c-primary);
    margin-bottom: 16px;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--c-text-light);
    margin-bottom: 40px;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* Abstract Visual for Hero */
.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.codvia-icons-logo {
    display: flex;
    gap: 0.75em;
    font-size: 22px;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
    transform: rotateX(10deg) rotateY(-15deg);
    transform-style: preserve-3d;
}

@media (max-width: 1024px) {
    .codvia-icons-logo {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .codvia-icons-logo {
        font-size: 10px;
        transform: none;
        flex-wrap: wrap;
        gap: 1em;
    }
}

.letter {
    display: grid;
    gap: 0.25em;
    transform: translateZ(20px);
}

.letter-4x5 { grid-template-columns: repeat(4, 1em); grid-template-rows: repeat(5, 1em); }
.letter-5x5 { grid-template-columns: repeat(5, 1em); grid-template-rows: repeat(5, 1em); }
.letter-3x5 { grid-template-columns: repeat(3, 1em); grid-template-rows: repeat(5, 1em); }

.app-icon {
    width: 1em;
    height: 1em;
    border-radius: 0.25em;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1), inset 0 1px 0 rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
    animation: floatIcon 4s ease-in-out infinite alternate;
}

.app-icon::after {
    content: '';
    position: absolute;
    top: 25%; left: 25%; right: 25%; bottom: 25%;
    background: rgba(255,255,255,0.4);
    border-radius: 50%;
}

.app-icon:nth-child(2n) {
    background: linear-gradient(135deg, #0ea5e9 0%, #2563eb 100%);
    animation-delay: -1s;
}
.app-icon:nth-child(2n)::after { border-radius: 2px; }

.app-icon:nth-child(3n) {
    background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
    animation-delay: -2s;
}
.app-icon:nth-child(3n)::after {
    border-radius: 0;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.app-icon:nth-child(5n) {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    animation-delay: -3s;
}
.app-icon:nth-child(5n)::after {
    border-radius: 0;
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
}

.app-icon:nth-child(7n) {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    animation-delay: -0.5s;
}

@keyframes floatIcon {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(-4px) scale(1.05); }
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.about-text {
    font-size: 1.125rem;
    color: var(--c-text-main);
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.info-card {
    background-color: var(--c-bg-main);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border);
    transition: var(--transition);
    text-align: center;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.info-icon {
    width: 64px;
    height: 64px;
    background-color: var(--c-bg-alt);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--c-primary);
}

.info-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.info-desc {
    color: var(--c-text-light);
    font-size: 0.95rem;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    padding: 40px;
    border-radius: var(--radius-lg);
    background-color: var(--c-bg-main);
    border: 1px solid var(--c-border);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--c-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 16px;
}

.service-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--c-primary);
    transition: var(--transition);
}

.service-card:hover .service-title::after {
    width: 60px;
}

.service-desc {
    color: var(--c-text-light);
    font-size: 0.95rem;
}

/* ==========================================================================
   Apps Section
   ========================================================================== */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.app-card {
    background-color: var(--c-bg-main);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border);
    transition: var(--transition);
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.app-icon-placeholder {
    height: 200px;
    background-color: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--c-text-light);
}

.app-info {
    padding: 30px;
}

.app-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.app-desc {
    color: var(--c-text-light);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.app-badges {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-ios {
    background-color: #f1f5f9;
    color: var(--c-primary);
}

.badge-android {
    background-color: #f0fdf4;
    color: #166534;
}

.app-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--c-accent);
    display: inline-flex;
    align-items: center;
}

.app-link:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Advantages Section
   ========================================================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.advantage-item {
    display: flex;
    flex-direction: column;
}

.advantage-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--c-border);
    line-height: 1;
    margin-bottom: 16px;
    font-family: var(--f-sans);
}

.advantage-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.advantage-desc {
    color: var(--c-text-light);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-section {
    padding: 80px 0;
}

.cta-box {
    background-color: var(--c-primary);
    border-radius: var(--radius-lg);
    padding: 80px 40px;
    text-align: center;
    color: #ffffff;
}

.cta-title {
    color: #ffffff;
    font-size: 2.5rem;
    margin-bottom: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-desc {
    font-size: 1.125rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-box .btn-primary {
    background-color: #ffffff;
    color: var(--c-primary);
}

.cta-box .btn-primary:hover {
    background-color: #f8fafc;
    transform: translateY(-2px);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info-title {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.contact-info-desc {
    color: var(--c-text-light);
    margin-bottom: 40px;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    display: flex;
    gap: 20px;
}

.info-item-icon {
    width: 48px;
    height: 48px;
    background-color: var(--c-bg-alt);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-primary);
    flex-shrink: 0;
}

.info-item-title {
    font-size: 1rem;
    margin-bottom: 4px;
}

.info-item-text {
    color: var(--c-text-light);
    font-size: 0.95rem;
}

.contact-form {
    background-color: var(--c-bg-main);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--c-border);
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--c-primary);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--c-bg-alt);
}

.form-control:focus {
    outline: none;
    border-color: var(--c-primary);
    background-color: var(--c-bg-main);
}

textarea.form-control {
    resize: vertical;
}

.form-success {
    display: none;
    margin-top: 20px;
    padding: 16px;
    background-color: #f0fdf4;
    color: #166534;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    text-align: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--c-bg-alt);
    padding: 80px 0 40px;
    border-top: 1px solid var(--c-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 16px;
    display: inline-block;
}

.footer-desc {
    color: var(--c-text-light);
    max-width: 400px;
}

.footer-title {
    font-size: 1.125rem;
    margin-bottom: 24px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--c-text-light);
}

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

.footer-contact p {
    color: var(--c-text-light);
    margin-bottom: 12px;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding-top: 40px;
    border-top: 1px solid var(--c-border);
    color: var(--c-text-light);
    font-size: 0.9rem;
}

.legal-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.legal-links a {
    color: var(--c-text-light);
    transition: var(--transition);
}

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

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* ==========================================================================
   Legal Pages (Privacy Policy, Terms, etc.)
   ========================================================================== */
.legal-page {
    padding-top: 140px;
    padding-bottom: 80px;
}

.legal-header {
    text-align: center;
    margin-bottom: 60px;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 40px;
}

.legal-header h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.legal-header .company-name {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--c-primary);
}

.legal-header .last-updated {
    color: var(--c-text-light);
    margin-top: 8px;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin: 40px 0 16px;
    color: var(--c-primary);
}

.legal-content h3 {
    font-size: 1.25rem;
    margin: 24px 0 12px;
    color: var(--c-primary);
}

.legal-content p {
    margin-bottom: 16px;
    color: var(--c-text-main);
}

.legal-content ul {
    list-style-type: disc;
    padding-left: 24px;
    margin-bottom: 24px;
    color: var(--c-text-main);
}

.legal-content li {
    margin-bottom: 8px;
}

.legal-content a {
    color: var(--c-accent);
    text-decoration: underline;
}

.legal-content a:hover {
    color: var(--c-primary);
}

/* ==========================================================================
   Animations & Reveal
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay { transition-delay: 0.1s; }
.reveal-delay-1 { transition-delay: 0.2s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.4s; }

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .hero-container { gap: 40px; }
    .about-cards { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
    .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: span 2; }
}

@media (max-width: 768px) {
    section { padding: var(--section-padding-mobile); }
    
    .menu-toggle { display: block; }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--c-bg-main);
        padding: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
        border-top: 1px solid var(--c-border);
    }
    
    .nav.active { transform: translateY(0); }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .hero {
        padding-top: 120px;
        text-align: center;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
    }
    
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        height: 300px;
        margin-top: 40px;
    }
    
    .shape-1 { width: 200px; height: 280px; }
    .shape-2 { width: 160px; height: 220px; left: 5%; }
    .shape-3 { width: 160px; height: 220px; right: 5%; }
    
    .section-title { font-size: 2rem; }
    
    .advantages-grid { grid-template-columns: 1fr; }
    
    .cta-title { font-size: 2rem; }
    .cta-box { padding: 60px 20px; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-brand { grid-column: span 1; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .about-cards { grid-template-columns: 1fr; }
}