/* ============================================
   Clear Suite Apps – Liquid Glass Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Light Mode (default) */
    --bg: #F5F5F7;
    --surface: #FFFFFF;
    --text-primary: #1D1D1F;
    --text-secondary: #6E6E73;
    --text-tertiary: #AEAEB2;
    --accent: #007AFF;
    --accent-hover: #0056CC;
    --divider: rgba(0, 0, 0, 0.08);
    --hero-glow: rgba(0, 122, 255, 0.04);

    /* Liquid Glass Tokens – Light */
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-border-bottom: rgba(0, 0, 0, 0.04);
    --glass-highlight: rgba(255, 255, 255, 0.9);
    --glass-shadow: 0 2px 16px rgba(0, 0, 0, 0.06), 0 8px 40px rgba(0, 0, 0, 0.04);
    --glass-shadow-hover: 0 4px 24px rgba(0, 0, 0, 0.1), 0 12px 48px rgba(0, 0, 0, 0.06);
    --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.8);
    --glass-blur: blur(40px) saturate(200%);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1C1C1E;
        --surface: #2C2C2E;
        --text-primary: #F5F5F7;
        --text-secondary: #A1A1A6;
        --text-tertiary: #636366;
        --accent: #0A84FF;
        --accent-hover: #409CFF;
        --divider: rgba(255, 255, 255, 0.08);
        --hero-glow: rgba(10, 132, 255, 0.06);

        /* Liquid Glass Tokens – Dark */
        --glass-bg: rgba(44, 44, 46, 0.5);
        --glass-bg-strong: rgba(44, 44, 46, 0.65);
        --glass-border: rgba(255, 255, 255, 0.1);
        --glass-border-bottom: rgba(0, 0, 0, 0.2);
        --glass-highlight: rgba(255, 255, 255, 0.06);
        --glass-shadow: 0 2px 16px rgba(0, 0, 0, 0.2), 0 8px 40px rgba(0, 0, 0, 0.16);
        --glass-shadow-hover: 0 4px 24px rgba(0, 0, 0, 0.3), 0 12px 48px rgba(0, 0, 0, 0.2);
        --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.06);
        --glass-blur: blur(40px) saturate(180%);
    }
}

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

[hidden] {
    display: none !important;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    background-color: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

/* --- Utility --- */
.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Liquid Glass Component --- */
.glass {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-bottom-color: var(--glass-border-bottom);
    box-shadow: var(--glass-shadow), var(--glass-inset);
}

/* Specular highlight – top light reflex */
.glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    border-radius: inherit;
    pointer-events: none;
    z-index: 1;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 24px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav.scrolled {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-inset);
}

.nav-inner {
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 9px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 12px;
    transition: color 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                background 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--divider);
}

.nav-link.active {
    color: var(--accent);
}

/* Legal Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 12px;
    font-family: inherit;
    transition: color 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                background 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-dropdown-trigger:hover {
    color: var(--text-primary);
    background: var(--divider);
}

.nav-dropdown-trigger .chevron {
    font-size: 10px;
    transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-dropdown.open .chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    padding: 6px;
    border-radius: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.96);
    transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.nav-dropdown-menu a {
    display: block;
    padding: 10px 14px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 10px;
    transition: color 0.15s, background 0.15s;
}

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

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    background: var(--divider);
    border-radius: 10px;
    padding: 2px;
    gap: 0;
}

.lang-btn {
    background: none;
    border: none;
    padding: 6px 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 8px;
    font-family: inherit;
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.lang-btn.active {
    background: var(--surface);
    color: var(--text-primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

/* Mobile Menu */
.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 10px;
    transition: background 0.2s;
}

.nav-mobile-toggle:hover {
    background: var(--divider);
}

.nav-mobile-toggle svg {
    width: 22px;
    height: 22px;
    display: block;
}

/* --- Hero Section --- */
.hero {
    padding: 140px 24px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Subtle ambient glow */
.hero::before {
    content: '';
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--hero-glow) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.hero p {
    font-size: clamp(18px, 2.5vw, 22px);
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.5;
}

/* --- Apps Section --- */
.apps-section {
    padding: 40px 24px 100px;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.apps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 520px;
    margin: 0 auto;
}

.app-card {
    border-radius: 24px;
    padding: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
    transition: box-shadow 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                border-color 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.app-card:hover {
    box-shadow: var(--glass-shadow-hover), var(--glass-inset);
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.5);
}

@media (prefers-color-scheme: dark) {
    .app-card:hover {
        border-color: rgba(255, 255, 255, 0.14);
    }
}

.app-icon {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.app-name {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.app-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.badge {
    display: inline-block;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    border-radius: 20px;
    background: rgba(0, 122, 255, 0.1);
    color: var(--accent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 12px rgba(0, 122, 255, 0.25);
    transition: background 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn-download:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.35);
    color: #fff;
}

.btn-download:active {
    transform: scale(0.98);
}

.apps-note {
    text-align: center;
    margin-top: 40px;
    font-size: 15px;
    color: var(--text-tertiary);
    font-weight: 400;
}

/* --- Legal Pages --- */
.page-content {
    padding: 120px 24px 80px;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: 48px;
}

.page-header h1 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.legal-content {
    max-width: 720px;
    margin: 0 auto;
    border-radius: 24px;
    padding: 40px;
}

.legal-content h2 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.legal-content ul {
    padding-left: 20px;
    margin-bottom: 12px;
}

.legal-content li {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 4px;
}

.legal-content .placeholder {
    color: var(--accent);
    font-weight: 600;
    background: rgba(0, 122, 255, 0.08);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 14px;
}

/* --- Support Page --- */
.support-grid {
    max-width: 720px;
    margin: 0 auto;
    display: grid;
    gap: 32px;
}

.support-card {
    border-radius: 24px;
    padding: 40px;
}

.support-card h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

/* Contact Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-family: inherit;
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 12px rgba(0, 122, 255, 0.25);
    transition: background 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.35);
}

.btn-primary:active {
    transform: scale(0.98);
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid var(--divider);
    padding: 16px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    padding: 4px 0;
    font-family: inherit;
}

.faq-question .chevron {
    font-size: 12px;
    color: var(--text-tertiary);
    transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    flex-shrink: 0;
    margin-left: 12px;
}

.faq-item.open .faq-question .chevron {
    transform: rotate(180deg);
}

.faq-answer {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                opacity 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    opacity: 1;
}

.faq-answer p {
    padding-top: 10px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--divider);
    padding: 32px 24px;
}

.footer-inner {
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    list-style: none;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

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

.footer-copy {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger child animations */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: 16px 24px;
        gap: 4px;
        background: var(--glass-bg-strong);
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
        border-bottom: 1px solid var(--glass-border);
        box-shadow: var(--glass-shadow);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-mobile-toggle {
        display: flex;
    }

    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        min-width: 0;
        padding: 4px 0 4px 16px;
        background: none;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        box-shadow: none;
        display: none;
    }

    .nav-dropdown-menu::before {
        display: none;
    }

    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }

    .hero {
        padding: 120px 24px 60px;
    }

    .legal-content {
        padding: 24px;
    }

    .support-card {
        padding: 24px;
    }

    .lang-toggle {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 17px;
    }

    .app-card {
        padding: 24px;
    }
}