/* ============================================================
   iDayTour Landing Page — Ocean Breeze Theme
   ============================================================ */

:root {
    --primary: #2d8b8b;
    --primary-dark: #1f6b6b;
    --primary-light: #3da8a8;
    --bg: #f5f7fa;
    --white: #ffffff;
    --text-dark: #1a2332;
    --text-muted: #5e808a;
    --text-light: #8ca0aa;
    --gray-100: #e8ecf0;
    --gray-50: #f0f3f5;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --font-sans: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---- Navigation ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: box-shadow 0.3s ease;
}

.nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-dark);
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--gray-100);
    background: var(--white);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.nav-cta {
    display: inline-flex;
    padding: 8px 18px;
    border-radius: 10px;
    background: var(--primary);
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(45,139,139,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(45,139,139,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid rgba(45,139,139,0.3);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(45,139,139,0.05);
}

.btn-white {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(45,139,139,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(45,139,139,0.05) 0%, transparent 50%),
        linear-gradient(180deg, #e8f4f4 0%, var(--bg) 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 10%;
    right: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(45,139,139,0.04);
    filter: blur(80px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(45,139,139,0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: clamp(32px, 6vw, 52px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-dark);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(15px, 2.5vw, 18px);
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 2px;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--gray-100);
}

/* ---- Features ---- */
.features {
    padding: 80px 0;
}

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

.section-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 16px;
    background: rgba(45,139,139,0.08);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    border: 1px solid rgba(0,0,0,0.04);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(45,139,139,0.12);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
    display: block;
}

.feature-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

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

.cta-content {
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-xl);
    padding: 60px 32px;
    box-shadow: 0 12px 48px rgba(45,139,139,0.25);
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
}

.cta-title {
    font-size: clamp(22px, 3.5vw, 30px);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.cta-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 28px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
}

/* ---- Footer ---- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--gray-100);
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.footer-copy {
    font-size: 12px;
    color: var(--text-light);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-value {
        font-size: 22px;
    }

    .cta-content {
        padding: 40px 24px;
    }

    .nav-cta {
        display: none;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .feature-card {
        text-align: left;
        display: flex;
        gap: 16px;
        padding: 20px;
        align-items: flex-start;
    }

    .feature-icon {
        font-size: 32px;
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .hero-ctas .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ---- Animations ---- */
@media (prefers-reduced-motion: no-preference) {
    .feature-card {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeUp 0.5s ease forwards;
    }

    .feature-card:nth-child(1) { animation-delay: 0.1s; }
    .feature-card:nth-child(2) { animation-delay: 0.15s; }
    .feature-card:nth-child(3) { animation-delay: 0.2s; }
    .feature-card:nth-child(4) { animation-delay: 0.25s; }
    .feature-card:nth-child(5) { animation-delay: 0.3s; }
    .feature-card:nth-child(6) { animation-delay: 0.35s; }

    @keyframes fadeUp {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}