/* ==========================================================================
   CouplePlay — Global Styles & Design System
   ========================================================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- Design Tokens ---------- */
:root {
    /* Colors */
    --primary: #FF4F81;
    --primary-light: #FF7BA7;
    --primary-dark: #D63A6A;
    --secondary: #8A5CFF;
    --secondary-light: #A880FF;
    --secondary-dark: #6B3FCC;
    --accent: #FFD700;
    --success: #2ECC71;
    --warning: #F39C12;
    --danger: #E74C3C;
    --info: #3498DB;

    /* Backgrounds */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-card: rgba(255, 255, 255, 0.08);
    --bg-card-hover: rgba(255, 255, 255, 0.12);
    --bg-glass: rgba(255, 255, 255, 0.05);

    /* Text */
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --text-dark: #0F172A;

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.15);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 79, 129, 0.3);
    --shadow-glow-secondary: 0 0 20px rgba(138, 92, 255, 0.3);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF4F81, #8A5CFF);
    --gradient-secondary: linear-gradient(135deg, #8A5CFF, #4ECDC4);
    --gradient-warm: linear-gradient(135deg, #FF4F81, #FF9800);
    --gradient-cool: linear-gradient(135deg, #3498DB, #8A5CFF);
    --gradient-bg: linear-gradient(180deg, #0F172A 0%, #1a1a2e 50%, #0F172A 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02));

    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3rem;
    --fs-5xl: 4rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-toast: 400;
    --z-tooltip: 500;

    /* Navbar */
    --navbar-height: 70px;
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(255, 79, 129, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(138, 92, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(78, 205, 196, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    color: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    border: none;
    outline: none;
    background: none;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); }

p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.page-content {
    position: relative;
    z-index: 1;
    padding-top: calc(var(--navbar-height) + var(--space-2xl));
    padding-bottom: var(--space-4xl);
    min-height: 100vh;
}

.section {
    margin-bottom: var(--space-4xl);
}

.section-header {
    margin-bottom: var(--space-2xl);
    text-align: center;
}

.section-header h2 {
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: var(--fs-md);
}

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-sticky);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-lg);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--fs-xl);
    font-weight: 800;
    color: var(--text-primary);
    transition: var(--transition-base);
}

.navbar-logo:hover {
    transform: scale(1.05);
}

.navbar-logo .logo-icon {
    font-size: var(--fs-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.navbar-menu a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-base);
    position: relative;
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.navbar-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Dark mode toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: var(--fs-lg);
    color: var(--text-secondary);
    transition: var(--transition-base);
    cursor: pointer;
}

.theme-toggle:hover {
    color: var(--accent);
    background: var(--bg-card);
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.menu-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

/* ---------- Glass Card ---------- */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition-base);
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    font-weight: 600;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    white-space: nowrap;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 79, 129, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 79, 129, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--fs-sm);
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--fs-lg);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-sm);
}

/* ---------- Badge ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: rgba(255, 79, 129, 0.15);
    color: var(--primary);
}

.badge-secondary {
    background: rgba(138, 92, 255, 0.15);
    color: var(--secondary);
}

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

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

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    max-width: 500px;
    width: 90%;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-bounce);
    text-align: center;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal h2 {
    margin-bottom: var(--space-md);
}

.modal p {
    margin-bottom: var(--space-xl);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* ---------- Toast ---------- */
.toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + var(--space-md));
    right: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    z-index: var(--z-toast);
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: var(--transition-bounce);
}

.toast.show {
    transform: translateX(0);
}

.toast-icon {
    font-size: var(--fs-xl);
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-info .toast-icon { color: var(--info); }
.toast-warning .toast-icon { color: var(--warning); }

/* ---------- Footer ---------- */
.footer {
    position: relative;
    z-index: 1;
    background: rgba(15, 23, 42, 0.6);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.footer-logo {
    font-size: var(--fs-xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-text {
    color: var(--text-muted);
    font-size: var(--fs-sm);
}

.footer-hearts {
    color: var(--primary);
    animation: heartbeat 1.5s ease infinite;
}

/* ---------- Grid ---------- */
.grid {
    display: grid;
    gap: var(--space-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Focus states for accessibility */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

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

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    h1 { font-size: var(--fs-3xl); }
    h2 { font-size: var(--fs-2xl); }
}

@media (max-width: 768px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: var(--fs-2xl); }
    h2 { font-size: var(--fs-xl); }

    .navbar-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-sm);
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

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

    .navbar-menu a {
        width: 100%;
        padding: var(--space-md);
        border-radius: var(--radius-sm);
    }

    .menu-toggle {
        display: flex;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .page-content {
        padding-top: calc(var(--navbar-height) + var(--space-xl));
    }
}

@media (max-width: 480px) {
    .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }

    h1 { font-size: var(--fs-xl); }
    .btn-lg {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--fs-base);
    }
}

/* Heartbeat animation for footer */
@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}