@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: rgba(20, 30, 48, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 134, 137, 0.15);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --color-accent: #008689;
    --color-accent-hover: #006d6f;
    --color-accent-gradient: linear-gradient(135deg, #008689 0%, #00b4b8 100%);
    --color-accent-glow: 0 0 20px rgba(0, 134, 137, 0.4);
    
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    
    --font-heading: 'Be Vietnam Pro', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-body);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Natural page loading transition */
main {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

body.page-entered main {
    opacity: 1;
    transform: translateY(0);
}

body.page-leaving main {
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.18s ease-in, transform 0.18s ease-in;
}

/* Background Gradients */
body::before {
    content: '';
    position: fixed;
    top: -200px;
    left: -200px;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 134, 137, 0.15) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -150px;
    right: -150px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 180, 184, 0.12) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
}

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

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

/* Header & Navigation */
header {
    background: rgba(11, 15, 25, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    background: var(--color-accent-gradient);
    -webkit-background-clip: unset;
    -webkit-text-fill-color: white;
    padding: 0.5rem;
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
}

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

.nav-link:hover, .nav-link.active {
    color: #ffffff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 134, 137, 0.3);
}

.btn-primary:hover {
    box-shadow: var(--color-accent-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: var(--color-error);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* Main Container */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Glassmorphism Card */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: #ffffff;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 134, 137, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

/* Modern Tables */
.table-container {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background: rgba(255, 255, 255, 0.02);
    padding: 0.85rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    vertical-align: middle;
}

td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.85rem;
    white-space: nowrap;
    vertical-align: middle;
    line-height: 1.5;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: 5rem 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #ffffff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-gradient-text {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

/* Feature Cards Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 25px rgba(0, 134, 137, 0.1);
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--color-accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: white;
}

/* Pricing Section */
.pricing-section {
    padding: 4rem 0;
}

.pricing-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    width: 100%;
    max-width: 380px;
}

.pricing-card.featured {
    border-color: var(--color-accent);
    box-shadow: 0 0 30px rgba(0, 134, 137, 0.15);
}

.pricing-card.featured::before {
    content: 'POPULAR';
    position: absolute;
    top: -12px;
    right: 25px;
    background: var(--color-accent-gradient);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    letter-spacing: 0.05em;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.price {
    font-size: 2.25rem;
    font-weight: 800;
    margin: 1.5rem 0;
    font-family: var(--font-heading);
}

.price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
    flex-grow: 1;
}

.pricing-features li {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features li i {
    color: var(--color-success);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding: 3rem 2rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* QR Code & Checkout */
.checkout-container {
    max-width: 800px;
    margin: 0 auto;
}

.qr-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.qr-image {
    max-width: 250px;
    width: 100%;
    border-radius: var(--radius-md);
    background: white;
    padding: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    margin: 1.5rem 0;
}

/* UT Link Container */
.ut-profile-card {
    background: linear-gradient(135deg, rgba(0, 134, 137, 0.08) 0%, rgba(0, 180, 184, 0.08) 100%);
    border: 1px solid rgba(0, 134, 137, 0.2);
}

.avatar-container {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-left {
    transform: translateX(-40px);
}

.reveal-right {
    transform: translateX(40px);
}

.reveal-left.revealed, .reveal-right.revealed {
    transform: translateX(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Pulsing Background Glow --- */
@keyframes glowPulse {
    0% { transform: scale(1); opacity: 0.15; }
    50% { transform: scale(1.1); opacity: 0.22; }
    100% { transform: scale(1); opacity: 0.15; }
}

body::before {
    animation: glowPulse 10s infinite alternate ease-in-out;
}

/* --- Hover and Micro-interactions --- */
.btn {
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1), background 0.2s ease;
}

.btn:active {
    transform: scale(0.96) !important;
}

.feature-card, .pricing-card, .card {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-card:hover, .pricing-card:hover {
    transform: translateY(-8px) scale(1.015);
    border-color: rgba(0, 134, 137, 0.35);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 25px rgba(0, 134, 137, 0.15);
}

/* Custom interactive input focus glow */
.form-control {
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

/* --- Custom Confirmation Modal Styles --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-icon {
    width: 60px;
    height: 60px;
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.5rem;
}

.modal-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.modal-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-actions .btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
}

/* Copyable License Key / Text Styles */
.copyable-license, .copyable-text {
    cursor: pointer;
    transition: all 0.2s ease;
}
.copyable-license:hover, .copyable-text:hover {
    color: var(--color-accent) !important;
}
.copyable-license i, .copyable-text i {
    opacity: 0.5;
    margin-left: 0.5rem;
    transition: opacity 0.2s, color 0.2s;
}
.copyable-license:hover i, .copyable-text:hover i {
    opacity: 1;
    color: var(--color-accent);
}