/* ============================================
   PREMIUM FUN FACTS - MEELO-INSPIRED DESIGN
   ============================================ */

/* Font Face Declarations */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('fonts/Inter-Regular.woff2') format('woff2');
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('fonts/Inter-SemiBold.woff2') format('woff2');
}

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('fonts/Inter-Bold.woff2') format('woff2');
}

/* CSS Variables */
:root {
    /* Colors */
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text-primary: #0F0F0F;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-border: #E5E5E5;
    --color-accent: #0F0F0F;
    --color-accent-hover: #2A2A2A;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;

    /* Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
}

.hero-logo {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin-bottom: var(--space-xl);
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Privacy Page Hero Adjustments */
.hero-small {
    padding: var(--space-2xl) var(--space-lg) var(--space-lg);
}

.hero-logo-small {
    max-width: 250px;
}

.hero-logo-small:hover {
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

/* Main Content */
.main {
    padding: 0 var(--space-lg) var(--space-4xl);
}

.main-container {
    max-width: 700px;
    margin: 0 auto;
}

/* Fact Display Card */
.fact-display {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl) var(--space-xl);
    margin-bottom: var(--space-xl);
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.fact-display:hover {
    border-color: var(--color-text-tertiary);
    box-shadow: var(--shadow-lg);
}

.fact-display-inner {
    text-align: center;
    width: 100%;
}

.fact-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }
}

.fact-text {
    font-size: var(--font-size-2xl);
    line-height: 1.5;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
    font-weight: 400;
}

.fact-meta {
    display: flex;
    justify-content: center;
    margin-top: var(--space-md);
}

.fact-category {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-text-primary);
    color: var(--color-surface);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Loading State */
.btn-loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

.btn-primary.loading .btn-text,
.btn-primary.loading .btn-icon {
    display: none;
}

.btn-primary.loading .btn-loading-spinner {
    display: block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Primary Button */
.btn-primary {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: #ff5e6c;
    color: var(--color-surface);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: var(--space-xl);
}

.btn-primary:hover {
    background: #ff4757;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(255, 94, 108, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-text {
    flex: 1;
}

.btn-icon {
    font-size: var(--font-size-xl);
    transition: transform 0.2s ease;
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

/* Sponsored Section */
.sponsored {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
    background: linear-gradient(135deg, #ffffff 0%, #fff5f7 50%, #ffffff 100%);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: visible;
    box-shadow:
        0 1px 2px rgba(0, 0, 0, 0.04),
        0 4px 8px rgba(0, 0, 0, 0.04),
        0 12px 24px rgba(0, 0, 0, 0.06);
}

.sponsored::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, rgba(255, 94, 108, 0.1), rgba(255, 160, 107, 0.1));
    border-radius: var(--radius-md);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.sponsored:hover {
    transform: translateY(-6px);
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.04),
        0 8px 16px rgba(0, 0, 0, 0.06),
        0 20px 40px rgba(255, 94, 108, 0.15),
        0 0 0 1px rgba(255, 94, 108, 0.1);
    border-color: rgba(255, 94, 108, 0.2);
}

.sponsored:hover::before {
    opacity: 1;
}

.sponsored-tag {
    position: absolute;
    top: -13px;
    right: var(--space-xl);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #FFFFFF;
    background: linear-gradient(135deg, #ff6b9d 0%, #ff5e6c 50%, #ffa06b 100%);
    padding: 0.4rem 0.9rem;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 700;
    box-shadow:
        0 2px 8px rgba(255, 94, 108, 0.3),
        0 8px 16px rgba(255, 94, 108, 0.2);
    z-index: 10;
    transition: all 0.3s ease;
}

.sponsored:hover .sponsored-tag {
    transform: translateY(-2px);
    box-shadow:
        0 4px 12px rgba(255, 94, 108, 0.4),
        0 12px 24px rgba(255, 94, 108, 0.3);
}

.sponsored-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    color: #ff5e6c;
    text-decoration: none;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sponsored-link:hover {
    color: #ff4757;
    transform: scale(1.03);
}

.sponsored-arrow {
    font-size: var(--font-size-2xl);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.8;
}

.sponsored-link:hover .sponsored-arrow {
    transform: translate(6px, -6px) rotate(-15deg);
    opacity: 1;
}

.sponsored-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-weight: 500;
}

/* Footer */
.footer {
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-4xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

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

.footer-author-link {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.footer-author-link:hover {
    color: var(--color-text-primary);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: var(--space-3xl) var(--space-md) var(--space-2xl);
    }

    .hero-logo {
        max-width: 300px;
    }

    .hero-small {
        padding: var(--space-xl) var(--space-md) var(--space-md);
    }

    .hero-logo-small {
        max-width: 200px;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .main {
        padding: 0 var(--space-md) var(--space-3xl);
    }

    .fact-display {
        padding: var(--space-2xl) var(--space-lg);
        min-height: 280px;
    }

    .fact-text {
        font-size: var(--font-size-xl);
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--space-sm) var(--space-md);
    }

    .hero {
        padding: var(--space-2xl) var(--space-sm) var(--space-xl);
    }

    .hero-logo {
        max-width: 250px;
    }

    .hero-small {
        padding: var(--space-lg) var(--space-sm) var(--space-sm);
    }

    .hero-logo-small {
        max-width: 180px;
    }

    .main {
        padding: 0 var(--space-sm) var(--space-2xl);
    }

    .fact-display {
        padding: var(--space-xl) var(--space-md);
        min-height: 240px;
        border-radius: var(--radius-lg);
    }

    .fact-icon {
        font-size: 3rem;
    }

    .fact-text {
        font-size: var(--font-size-lg);
    }

    .btn-primary {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-size-base);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {

    .nav,
    .btn-primary,
    .sponsored,
    .footer {
        display: none;
    }

    .fact-display {
        border: 2px solid var(--color-border);
        box-shadow: none;
    }
}

/* 404 Page */
.error-container {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
}

.error-content {
    max-width: 600px;
    width: 100%;
}

.error-code {
    font-size: clamp(6rem, 15vw, 10rem);
    font-weight: 800;
    line-height: 1;
    color: #ff5e6c;
    margin-bottom: var(--space-md);
    animation: float 3s ease-in-out infinite;
}

.error-fact {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin: var(--space-xl) auto;
    text-align: left;
    box-shadow: var(--shadow-md);
}

.error-fact-label {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-xs);
    font-weight: 600;
}

.error-fact-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.6;
}