/* ==========================================================================
   COCALIT - UNIFIED DESIGN SYSTEM & ACCESSIBLE STYLING
   ========================================================================== */

:root {
    /* Brand Color Palette (Strict WCAG AAA & AA Compliance) */
    --color-primary: #007a7a;
    --color-primary-hover: #005f5f;
    --color-primary-dark: #004d4d;
    --color-accent: #00d4aa;
    --color-accent-hover: #00ffcc;
    --color-accent-dark: #00a885;
    
    /* Backgrounds & Surfaces */
    --color-bg: #f8fafb;
    --color-surface: #ffffff;
    --color-surface-subtle: #f0f6f6;
    --color-surface-card: #ffffff;
    --color-surface-dark: #111a1c;
    --color-surface-dark-card: #192729;
    
    /* Typography Colors (High Contrast) */
    --color-text-main: #162426;       /* Contrast ratio: > 13:1 on light */
    --color-text-muted: #475a5d;      /* Contrast ratio: > 5.5:1 on light */
    --color-text-subtle: #5f7477;     /* Contrast ratio: > 4.5:1 on light */
    --color-text-inverse: #ffffff;
    --color-text-inverse-muted: #9eb5b8;
    
    /* Borders & Dividers */
    --color-border: #d2e0e2;
    --color-border-subtle: #e5eff0;
    --color-border-dark: rgba(0, 212, 170, 0.25);
    
    /* Status & Dietary Feedback */
    --color-success: #0b6953;
    --color-success-bg: #e6f7f2;
    --color-success-border: #10b981;
    --color-danger: #b91c1c;
    --color-danger-bg: #fef2f2;
    --color-danger-border: #ef4444;
    --color-warning: #92400e;
    --color-warning-bg: #fffbeb;
    --color-warning-border: #f59e0b;
    
    /* Typography Scale */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    
    /* Radii, Shadows, Transitions */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   1. RESET & BASE ACCESSIBILITY
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.65;
    font-size: 1.05rem;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Screen Reader Only Utility */
.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Universal Keyboard Focus Management */
:focus {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Skip Navigation Link */
.a11y-skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--color-accent);
    color: #0c1618;
    padding: 12px 20px;
    font-weight: 700;
    z-index: 999999;
    border-radius: var(--radius-sm);
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: top 0.2s ease;
}

.a11y-skip-link:focus {
    top: 16px;
    outline: 3px solid #000000;
    outline-offset: 2px;
}

/* Responsive Media & Images */
img, svg, picture, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-main);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.015em;
}

h1 { font-size: clamp(2rem, 5vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }

p {
    margin-bottom: 1.25rem;
    color: var(--color-text-main);
}

.hero-section p {
    color: #c5dada;
}

.demo-container p {
    color: #e5ecec;
}

.site-footer p,
.footer-copyright p {
    color: #a0b5b7;
    margin-bottom: 0;
}

.hidden {
    display: none !important;
}

a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: var(--transition);
}

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

/* ==========================================================================
   2. CORE CONTAINER ARCHITECTURE
   ========================================================================== */
.main-wrapper {
    flex: 1 0 auto;
}

.section-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.content-section {
    padding: 4rem 1.5rem;
}

.content-section h2 {
    margin-bottom: 1rem;
}

/* ==========================================================================
   3. UNIFIED SITE HEADER & NAVIGATION
   ========================================================================== */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-subtle);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.03);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.site-logo {
    height: 44px;
    width: auto;
    display: block;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.main-nav a {
    color: var(--color-text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem 0.25rem;
    position: relative;
    transition: var(--transition);
}

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

.main-nav a[aria-current="page"] {
    color: var(--color-primary);
    font-weight: 700;
}

.main-nav a[aria-current="page"]::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2.5px;
    background-color: var(--color-primary);
    border-radius: 2px;
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 32px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1002;
}

.hamburger-bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 3px;
    transition: var(--transition);
}

.mobile-nav-close {
    display: none;
    background: transparent;
    border: none;
    color: var(--color-accent);
    font-size: 1.75rem;
    cursor: pointer;
    padding: 0.5rem;
    align-self: flex-end;
}

.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-nav-overlay.active {
    display: block;
    opacity: 1;
}

/* Mobile Nav Drawer Responsive Breakpoint */
@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: flex;
    }

    .mobile-nav-close {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 290px;
        max-width: 85vw;
        height: 100vh;
        background: var(--color-surface-dark);
        border-left: 1px solid var(--color-border-dark);
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem 1.5rem 2rem;
        gap: 1rem;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1001;
        box-shadow: -8px 0 24px rgba(0, 0, 0, 0.4);
        overflow-y: auto;
    }

    .main-nav.active {
        right: 0;
    }

    .main-nav a {
        color: #e5ecec;
        font-size: 1.15rem;
        padding: 0.75rem 0.5rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .main-nav a:hover,
    .main-nav a[aria-current="page"] {
        color: var(--color-accent);
    }

    .main-nav a[aria-current="page"]::after {
        display: none;
    }

    .mobile-nav-toggle.active .hamburger-bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .mobile-nav-toggle.active .hamburger-bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-nav-toggle.active .hamburger-bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

/* ==========================================================================
   4. BRAND TOP BANNER
   ========================================================================== */
.brand-banner {
    background: linear-gradient(90deg, #111a1c 0%, #192729 100%);
    color: var(--color-text-inverse);
    padding: 0.75rem 1.5rem;
    text-align: center;
    font-size: 0.95rem;
    position: relative;
    z-index: 990;
    border-bottom: 1px solid rgba(0, 212, 170, 0.2);
}

.banner-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding-right: 2rem;
}

.banner-text {
    opacity: 0.95;
}

.countdown {
    font-weight: 700;
    color: var(--color-accent);
    font-family: var(--font-mono);
    padding: 2px 6px;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 4px;
}

.banner-link {
    color: var(--color-accent);
    text-decoration: underline;
    font-weight: 600;
}

.banner-link:hover {
    color: var(--color-accent-hover);
}

.close-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-text-inverse-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    line-height: 1;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--color-text-inverse);
    background: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   5. HERO & INTERACTIVE SIMULATION DEMO
   ========================================================================== */
.hero-section {
    background: linear-gradient(135deg, #111a1c 0%, #1a2c30 100%);
    color: var(--color-text-inverse);
    padding: 4rem 1.5rem;
    text-align: center;
    border-bottom: 4px solid var(--color-primary);
}

.hero-container {
    max-width: 860px;
    margin: 0 auto;
}

.hero-title {
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: #b0caca;
    margin-bottom: 2.5rem;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

/* Interactive Demo Container */
.demo-container {
    background: #152225;
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: 2rem 0;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    text-align: left;
}

.demo-heading {
    text-align: center;
    color: #ffffff;
    font-size: 1.4rem;
    margin-bottom: 1.25rem;
}

.profile-group {
    margin-bottom: 1.25rem;
}

.profile-label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
}

.profile-chips-grid {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.profile-chip {
    background: #1b2a2e;
    color: #e2ecec;
    border: 1.5px solid rgba(0, 212, 170, 0.4);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.profile-chip:hover,
.profile-chip:focus-visible {
    background: var(--color-accent);
    color: #0c1618;
    border-color: var(--color-accent);
}

.profile-chip.active {
    background: var(--color-accent);
    color: #0c1618;
    font-weight: 700;
    border-color: var(--color-accent);
    box-shadow: 0 0 12px rgba(0, 212, 170, 0.4);
}

.camera-frame {
    border: 3px solid var(--color-accent);
    border-radius: var(--radius-md);
    background: #090e0f;
    min-height: 240px;
    position: relative;
    overflow: hidden;
    margin-bottom: 1rem;
}

.camera-product-img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    display: block;
    opacity: 0.9;
}

.scan-box {
    position: absolute;
    inset: 16px;
    border: 2px dashed var(--color-accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.35);
    pointer-events: none;
}

.scan-status {
    background: rgba(0, 0, 0, 0.8);
    color: var(--color-accent);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.92rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

@keyframes scanLine {
    0% { top: 8%; opacity: 0.8; }
    50% { top: 88%; opacity: 1; }
    100% { top: 8%; opacity: 0.8; }
}

.scanning-active::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    height: 3px;
    background: var(--color-accent-hover);
    box-shadow: 0 0 14px var(--color-accent-hover);
    animation: scanLine 1.4s infinite ease-in-out;
}

.ai-response {
    background: rgba(0, 212, 170, 0.1);
    border-left: 4px solid var(--color-accent);
    padding: 14px 18px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-top: 1rem;
    color: #f0f7f7;
    font-size: 0.98rem;
}

.ai-verdict-badge {
    text-align: center;
    padding: 10px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-size: 1.05rem;
    letter-spacing: 0.03em;
}

.demo-trigger-btn {
    margin-top: 1.25rem;
    width: 100%;
    padding: 14px;
    background: var(--color-accent);
    color: #0c1618;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
}

.demo-trigger-btn:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 4px 16px rgba(0, 212, 170, 0.35);
    transform: translateY(-1px);
}

/* Call to Action Button */
.cta-button {
    background-color: var(--color-accent);
    color: #0c1618;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.15rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
}

.cta-button:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 170, 0.3);
}

/* ==========================================================================
   6. CONTACT SECTION & FORMS (ACCESSIBLE CONTRAST)
   ========================================================================== */
.contact-section {
    background-color: var(--color-surface);
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--color-border-subtle);
}

.contact-intro {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.contact-buttons-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.contact-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.9rem 1.75rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    flex: 1;
    min-width: 220px;
    text-align: center;
    font-size: 1rem;
}

/* Email Button - High Contrast (8.2:1) */
.email-btn {
    background-color: var(--color-surface-subtle);
    color: var(--color-primary-dark);
    border: 1.5px solid var(--color-primary-dark);
}

.email-btn:hover {
    background-color: #e2f0f0;
    color: #003838;
}

/* WhatsApp Button - High Contrast Dark Teal (5.1:1 on white text) */
.whatsapp-btn {
    background-color: #0d7367;
    color: #ffffff;
    border: 1.5px solid #0d7367;
}

.whatsapp-btn:hover {
    background-color: #09544b;
    border-color: #09544b;
}

.contact-form {
    background-color: var(--color-surface-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    text-align: left;
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-weight: 700;
    color: var(--color-text-main);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    background-color: #ffffff;
    color: var(--color-text-main);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 122, 0.2);
}

.submit-form-btn {
    background-color: var(--color-surface-dark);
    color: #ffffff;
    border: 2px solid transparent;
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
}

.submit-form-btn:hover {
    background-color: var(--color-primary-dark);
}

@media (min-width: 768px) {
    .submit-form-btn {
        width: auto;
    }
}

/* ==========================================================================
   7. UNIFIED SITE FOOTER
   ========================================================================== */
.site-footer {
    background-color: var(--color-surface-dark);
    color: var(--color-text-inverse-muted);
    padding: 3.5rem 1.5rem 2.5rem;
    border-top: 4px solid var(--color-primary);
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.75rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem 2.25rem;
}

.footer-links a {
    color: #c2d5d8;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--color-accent);
    text-decoration: underline;
}

.footer-copyright {
    font-size: 0.9rem;
    text-align: center;
    color: #8fa5a8;
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .footer-links {
        justify-content: flex-start;
    }
    
    .footer-copyright {
        text-align: right;
    }
}

/* ==========================================================================
   8. SHARED COMPONENTS (CARDS, BADGES, HIGHLIGHT BOXES, TABLES)
   ========================================================================== */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.highlight-box {
    background: var(--color-surface-subtle);
    border-left: 4px solid var(--color-primary);
    padding: 1.5rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.5rem 0;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success-border);
}

.badge-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger-border);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning-border);
}

/* Accessible Table System */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    background: var(--color-surface);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    text-align: left;
}

th {
    background: var(--color-surface-subtle);
    color: var(--color-text-main);
    padding: 12px 16px;
    font-weight: 700;
    border-bottom: 2px solid var(--color-border);
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-subtle);
    color: var(--color-text-main);
}

tr:hover td {
    background: var(--color-surface-subtle);
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}