/* ======================================
   AISHOP — Landing Page Premium UI
   Light theme with Navy Blue accent
   ====================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary: #3B4FBF;
    --primary-light: #5B6FDF;
    --primary-dark: #2A3A9E;
    --primary-glow: rgba(59, 79, 191, 0.25);
    --accent-steel: #A3C5F1;
    --accent-sky: #83A2CD;
    --bg-white: #ffffff;
    --bg-light: #f7f9fc;
    --bg-section: #f0f4fa;
    --text-dark: #1a1a2e;
    --text-body: #4a5568;
    --text-muted: #718096;
    --border-light: rgba(59, 79, 191, 0.12);
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --radius: 16px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-white);
    color: var(--text-dark);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ====== NAVIGATION ====== */
.landing-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    transition: all 0.35s ease;
    border-bottom: 1px solid transparent;
}
.landing-nav.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
.nav-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 32px;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: var(--text-dark);
}
.nav-logo i { font-size: 2rem; color: var(--primary); }
.nav-logo-name { font-size: 1.3rem; font-weight: 800; letter-spacing: 2px; color: var(--primary); }
.nav-logo-tagline { font-size: 0.7rem; color: var(--text-muted); font-weight: 400; display: block; margin-top: -2px; }
.nav-menu {
    list-style: none; display: flex; gap: 8px;
}
.nav-link {
    text-decoration: none; color: var(--text-body);
    padding: 8px 18px; border-radius: 10px;
    font-weight: 500; font-size: 0.92rem;
    transition: all 0.25s ease;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: rgba(59,79,191,0.06); }
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-btn-outline {
    text-decoration: none; color: var(--primary);
    border: 1.5px solid var(--primary); padding: 9px 20px;
    border-radius: 10px; font-weight: 600; font-size: 0.88rem;
    transition: all 0.3s ease;
}
.nav-btn-outline:hover { background: rgba(59,79,191,0.06); transform: translateY(-1px); }
.nav-btn-solid {
    text-decoration: none; color: #fff;
    background: var(--primary); padding: 9px 20px;
    border-radius: 10px; font-weight: 600; font-size: 0.88rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px var(--primary-glow);
}
.nav-btn-solid:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px var(--primary-glow); }
.nav-hamburger {
    display: none; background: none; border: 1px solid var(--border-light);
    color: var(--text-dark); font-size: 1.5rem; padding: 6px 10px;
    border-radius: 8px; cursor: pointer;
}

/* ====== HERO ====== */
.hero-section {
    position: relative; padding: 160px 32px 80px;
    text-align: center; overflow: hidden;
    background: linear-gradient(180deg, #fff 0%, var(--bg-light) 100%);
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-shape {
    position: absolute; border-radius: 50%; opacity: 0.06;
    background: var(--primary);
}
.hero-shape-1 { width: 600px; height: 600px; top: -200px; right: -150px; animation: shapeFloat 20s ease-in-out infinite; }
.hero-shape-2 { width: 400px; height: 400px; bottom: -100px; left: -100px; animation: shapeFloat 25s ease-in-out infinite reverse; }
.hero-shape-3 { width: 200px; height: 200px; top: 40%; left: 60%; animation: shapeFloat 15s ease-in-out infinite 5s; }
@keyframes shapeFloat {
    0%,100% { transform: translate(0,0) scale(1); }
    50% { transform: translate(30px,-20px) scale(1.1); }
}
.hero-container { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; }
.hero-title {
    font-size: 3.2rem; font-weight: 800; line-height: 1.2;
    color: var(--text-dark); margin-bottom: 24px;
}
.hero-highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; font-style: italic;
}
.hero-subtitle {
    font-size: 1.05rem; color: var(--text-body); max-width: 620px;
    margin: 0 auto 36px; line-height: 1.7; font-weight: 400;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; margin-bottom: 60px; }
.hero-btn-primary {
    text-decoration: none; background: var(--primary); color: #fff;
    padding: 14px 32px; border-radius: 50px; font-weight: 700;
    font-size: 0.95rem; transition: all 0.3s ease;
    box-shadow: 0 6px 24px var(--primary-glow);
}
.hero-btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 30px var(--primary-glow); }
.hero-btn-secondary {
    text-decoration: none; color: var(--text-body);
    padding: 14px 32px; border-radius: 50px; font-weight: 600;
    font-size: 0.95rem; border: 1.5px solid #ddd;
    transition: all 0.3s ease;
}
.hero-btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* Hero Stats */
.hero-stats {
    display: flex; justify-content: center; align-items: center; gap: 40px;
    opacity: 0; transform: translateY(20px); transition: all 0.6s ease;
}
.hero-stats.visible { opacity: 1; transform: translateY(0); }
.hero-stat { text-align: center; }
.hero-stat-value { font-size: 2.2rem; font-weight: 800; color: var(--text-dark); }
.hero-stat-plus { font-size: 1.6rem; font-weight: 700; color: var(--text-dark); }
.hero-stat-label { display: block; font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; font-weight: 400; }
.hero-stat-divider { width: 1px; height: 50px; background: #e2e8f0; }

/* ====== SECTIONS COMMON ====== */
.section-container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.section-title {
    text-align: center; font-size: 2.2rem; font-weight: 800;
    color: var(--text-dark); margin-bottom: 12px;
}
.section-subtitle {
    text-align: center; font-size: 1rem; color: var(--text-muted);
    max-width: 500px; margin: 0 auto 50px; line-height: 1.6;
}

/* ====== FEATURES ====== */
.features-section { padding: 90px 32px; background: var(--bg-light); }
.features-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
    background: var(--bg-white); border-radius: var(--radius);
    padding: 32px 28px; border: 1px solid #eef1f6;
    transition: all 0.35s ease;
    opacity: 0; transform: translateY(20px);
}
.feature-card.visible { opacity: 1; transform: translateY(0); }
.feature-card:hover {
    transform: translateY(-6px); box-shadow: var(--shadow-md);
    border-color: rgba(59,79,191,0.15);
}
.feature-icon {
    width: 52px; height: 52px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; margin-bottom: 18px;
}
.feature-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.feature-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ====== PRICING ====== */
.pricing-section { padding: 90px 32px; background: var(--bg-white); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.pricing-card {
    background: var(--bg-white); border-radius: var(--radius);
    padding: 36px 28px; border: 1.5px solid #eef1f6;
    text-align: center; position: relative;
    transition: all 0.35s ease;
    opacity: 0; transform: translateY(20px);
}
.pricing-card.visible { opacity: 1; transform: translateY(0); }
.pricing-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.pricing-badge {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--success); color: #fff; padding: 4px 18px;
    border-radius: 20px; font-size: 0.78rem; font-weight: 700;
}
.pricing-featured {
    border-color: var(--primary); box-shadow: 0 8px 30px var(--primary-glow);
    transform: scale(1.03);
}
.pricing-featured.visible { transform: scale(1.03); }
.pricing-featured:hover { transform: scale(1.03) translateY(-6px); }
.pricing-name { font-size: 1.15rem; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; }
.pricing-name-long { font-size: 0.95rem; }
.pricing-amount { font-size: 2.4rem; font-weight: 800; color: var(--primary); }
.pricing-period { font-size: 0.9rem; color: var(--text-muted); font-weight: 400; }
.pricing-price { margin-bottom: 24px; }
.pricing-features {
    list-style: none; text-align: left; margin-bottom: 28px;
    display: flex; flex-direction: column; gap: 10px;
}
.pricing-features li {
    display: flex; align-items: center; gap: 10px;
    font-size: 0.9rem; color: var(--text-body);
}
.pricing-features li i { color: var(--primary); font-size: 1.1rem; flex-shrink: 0; }
.pricing-btn {
    display: block; text-decoration: none;
    background: var(--primary); color: #fff;
    padding: 13px 24px; border-radius: 10px;
    font-weight: 700; font-size: 0.92rem;
    transition: all 0.3s ease;
}
.pricing-btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px var(--primary-glow); }

/* ====== CONTACT ====== */
.contact-section { padding: 60px 32px; background: var(--bg-light); }
.contact-card {
    max-width: 700px; margin: 0 auto;
    background: var(--bg-white); border-radius: var(--radius);
    padding: 40px; text-align: center;
    border: 1px solid #eef1f6;
    box-shadow: var(--shadow-sm);
    opacity: 0; transform: translateY(20px); transition: all 0.5s ease;
}
.contact-card.visible { opacity: 1; transform: translateY(0); }
.contact-title { font-size: 1.4rem; font-weight: 700; color: var(--text-dark); margin-bottom: 24px; }
.contact-items { display: flex; justify-content: center; gap: 32px; margin-bottom: 12px; flex-wrap: wrap; }
.contact-item {
    display: flex; align-items: center; gap: 8px;
    color: var(--text-body); font-size: 0.92rem;
}
.contact-item i { font-size: 1.2rem; color: var(--primary); }

/* ====== CTA ====== */
.cta-section {
    padding: 90px 32px; text-align: center;
    background: var(--bg-white);
    opacity: 0; transform: translateY(20px); transition: all 0.5s ease;
}
.cta-section.visible { opacity: 1; transform: translateY(0); }
.cta-title { font-size: 2rem; font-weight: 800; color: var(--text-dark); margin-bottom: 12px; }
.cta-subtitle { font-size: 1rem; color: var(--text-muted); margin-bottom: 32px; }
.cta-btn {
    display: inline-block; text-decoration: none;
    background: var(--primary); color: #fff;
    padding: 15px 36px; border-radius: 12px;
    font-weight: 700; font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 6px 24px var(--primary-glow);
}
.cta-btn:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 10px 35px var(--primary-glow); }

/* ====== FOOTER ====== */
.landing-footer {
    background: var(--bg-light); border-top: 1px solid #eef1f6;
    padding: 24px 32px;
}
.footer-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
}
.footer-left {
    display: flex; align-items: center; gap: 8px;
    color: var(--text-muted); font-size: 0.85rem;
}
.footer-left i { font-size: 1.1rem; color: var(--primary); }
.footer-right { font-size: 0.82rem; color: var(--text-muted); }

/* ====== FLOATING SOCIALS ====== */
.floating-socials {
    position: fixed; bottom: 24px; right: 24px; z-index: 999;
    display: flex; flex-direction: column; gap: 10px;
}
.floating-btn {
    width: 48px; height: 48px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 1.3rem; text-decoration: none;
    transition: all 0.3s ease; box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}
.floating-btn:hover { transform: scale(1.12); }
.floating-telegram { background: #0088cc; }
.floating-zalo { background: #0068ff; }
.floating-phone { background: var(--success); }

/* ====== SCROLL TOP ====== */
.scroll-top {
    position: fixed; bottom: 24px; left: 24px; z-index: 999;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: #fff; border: none;
    font-size: 1.2rem; cursor: pointer;
    opacity: 0; pointer-events: none;
    transform: translateY(10px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--primary-glow);
}
.scroll-top.visible { opacity: 1; pointer-events: all; transform: translateY(0); }
.scroll-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ====== RESPONSIVE ====== */
@media (max-width: 900px) {
    .nav-menu { display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: #fff; flex-direction: column; padding: 16px; gap: 4px;
        border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-md);
    }
    .nav-menu.open { display: flex; }
    .nav-actions { display: none; }
    .nav-hamburger { display: flex; align-items: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .pricing-featured { transform: none; }
    .pricing-featured.visible { transform: none; }
    .pricing-featured:hover { transform: translateY(-6px); }
    .hero-title { font-size: 2.2rem; }
    .hero-stats { flex-wrap: wrap; gap: 20px; }
    .hero-stat-divider { display: none; }
    .footer-container { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 600px) {
    .nav-container { padding: 12px 16px; }
    .hero-section { padding: 130px 16px 60px; }
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 0.92rem; }
    .hero-cta { flex-direction: column; align-items: center; }
    .hero-stat-value { font-size: 1.6rem; }
    .features-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.6rem; }
    .features-section, .pricing-section, .cta-section { padding: 60px 16px; }
    .contact-card { padding: 24px; }
    .contact-items { flex-direction: column; gap: 12px; align-items: center; }
}

/* ====== 2-COL PRICING ====== */
.pricing-grid-2 { grid-template-columns: repeat(2, 1fr); max-width: 800px; margin: 0 auto; }

/* ====== PAYMENT MODAL ====== */
.pay-overlay {
    position: fixed; inset: 0; z-index: 2000;
    background: rgba(0,0,0,0.55); backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.pay-overlay.active { opacity: 1; pointer-events: all; }
.pay-modal {
    background: #fff; border-radius: 20px; padding: 36px 32px;
    width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto;
    position: relative;
    transform: translateY(30px); transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    box-shadow: 0 30px 80px rgba(0,0,0,0.18);
}
.pay-overlay.active .pay-modal { transform: translateY(0); }
.pay-close {
    position: absolute; top: 16px; right: 16px;
    background: #f0f4fa; border: none; border-radius: 50%;
    width: 34px; height: 34px; font-size: 1.1rem;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    color: #718096; transition: all 0.2s;
}
.pay-close:hover { background: #e2e8f0; color: #e53e3e; }
.pay-header { text-align: center; margin-bottom: 20px; }
.pay-header-icon {
    width: 60px; height: 60px; border-radius: 50%;
    background: linear-gradient(135deg, #3B4FBF, #5B6FDF);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; color: #fff; margin: 0 auto 14px;
}
.pay-header h2 { font-size: 1.4rem; font-weight: 700; color: #1a1a2e; margin-bottom: 4px; }
.pay-plan-label { font-size: 0.88rem; color: #3B4FBF; font-weight: 600; background: rgba(59,79,191,0.07); padding: 5px 14px; border-radius: 20px; display: inline-block; }
.pay-bank-info {
    background: #f7f9fc; border-radius: 12px; padding: 14px 18px;
    margin-bottom: 20px; border: 1px solid #e2e8f0;
}
.pay-bank-row {
    display: flex; align-items: center; gap: 10px;
    padding: 7px 0; border-bottom: 1px solid #eee; font-size: 0.88rem; color: #4a5568;
}
.pay-bank-row:last-child { border-bottom: none; }
.pay-bank-row i { color: #3B4FBF; font-size: 1rem; flex-shrink: 0; }
.pay-amount-row { font-weight: 700; }
.pay-amount-val { color: #3B4FBF; font-size: 1.05rem; font-weight: 800; }
.pay-qr-area { text-align: center; padding: 10px 0 2px; }
.pay-form-group { margin-bottom: 14px; display: flex; flex-direction: column; gap: 5px; }
.pay-form-group label { font-size: 0.85rem; font-weight: 600; color: #4a5568; }
.pay-form-group input {
    border: 1.5px solid #e2e8f0; border-radius: 10px;
    padding: 11px 14px; font-size: 0.92rem; font-family: 'Outfit', sans-serif;
    outline: none; transition: border-color 0.25s; color: #1a1a2e;
}
.pay-form-group input:focus { border-color: #3B4FBF; }
.pay-error { color: #e53e3e; font-size: 0.82rem; min-height: 18px; margin-bottom: 8px; text-align: center; }
.pay-submit-btn {
    width: 100%; padding: 13px; background: linear-gradient(135deg, #3B4FBF, #5B6FDF);
    color: #fff; border: none; border-radius: 12px; font-size: 0.95rem;
    font-weight: 700; cursor: pointer; font-family: 'Outfit', sans-serif;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: all 0.3s; box-shadow: 0 4px 14px rgba(59,79,191,0.3);
}
.pay-submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(59,79,191,0.35); }
.pay-submit-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.pay-success-icon { font-size: 4rem; color: #10b981; margin-bottom: 12px; }
.pay-success-title { font-size: 1.3rem; font-weight: 700; color: #1a1a2e; margin-bottom: 10px; }
.pay-success-msg { font-size: 0.92rem; color: #4a5568; line-height: 1.6; margin-bottom: 16px; }
.pay-success-contact {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(59,79,191,0.07); border-radius: 10px; padding: 10px 18px;
    font-size: 0.9rem; color: #3B4FBF;
}
.pay-success-contact i { font-size: 1.1rem; }
@media (max-width: 600px) {
    .pricing-grid-2 { grid-template-columns: 1fr; }
    .pay-modal { padding: 24px 18px; }
}

/* ====== ANIMATIONS ====== */
@keyframes spin {
    to { transform: rotate(360deg); }
}
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(59, 79, 191, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
.refreshing {
    animation: spin 0.8s linear infinite;
}