/* ==========================================================================
   Balloon Hunter Hub - Design System & Global Styles
   ========================================================================== */

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

:root {
    /* Colors */
    --color-sky-light: #6ebcf0;
    --color-sky-mid: #4fa9e8;
    --color-sky-dark: #2980b9;
    --color-text-main: #ffffff;
    --color-text-muted: #e0f2fe;
    --color-card-bg: rgba(255, 255, 255, 0.15);
    --color-card-border: rgba(255, 255, 255, 0.2);
    
    /* Semantic Colors */
    --color-balloon-red: #ff4757;
    --color-balloon-green: #2ed573;
    --color-balloon-yellow: #ffa502;
    --color-balloon-blue: #70a1ff;
    --color-balloon-black: #2f3542;
    --color-bird-pink: #ff7f50;

    /* Status Colors */
    --color-status-done: #2ed573;
    --color-status-wip: #ffa502;
    --color-status-future: #3742fa;

    /* Typography */
    --font-heading: 'Fredoka', sans-serif;
    --font-body: 'Nunito', sans-serif;

    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;

    /* Effects */
    --shadow-soft: 0 8px 32px 0 rgba(31, 38, 135, 0.2);
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --radius-lg: 24px;
    --radius-md: 16px;
}

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

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, #1f5f8b 0%, #3a7ca8 100%);
    background-attachment: fixed;
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(31, 95, 139, 0.9);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--color-card-border);
    padding: var(--space-md) 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-brand img {
    height: 40px;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav-links a {
    font-weight: 600;
    font-size: 1.1rem;
    padding: 5px 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--color-text-main);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================================================
   Components (Cards, Buttons, Badges)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    background: var(--color-balloon-red);
    color: white;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 71, 87, 0.4);
    transition: var(--transition-smooth);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 71, 87, 0.6);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    box-shadow: none;
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
}

.glass-card {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-5px);
    background: rgba(0, 0, 0, 0.3);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge.common { background: rgba(255, 255, 255, 0.2); }
.badge.special { background: var(--color-balloon-blue); }
.badge.legendary { background: var(--color-balloon-black); }
.badge.available { border: 1px solid var(--color-status-done); color: var(--color-status-done); }
.badge.wip { border: 1px solid var(--color-status-wip); color: var(--color-status-wip); }

/* ==========================================================================
   Animations & Backgrounds
   ========================================================================== */
.floating {
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.clouds-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: url('../assets/images/clouds.png') repeat-x center center;
    background-size: cover;
    opacity: 0.3;
    z-index: -1;
    animation: moveClouds 120s linear infinite;
    pointer-events: none;
}

@keyframes moveClouds {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ==========================================================================
   Layout Grids
   ========================================================================== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-lg); }

/* ==========================================================================
   Sections
   ========================================================================== */
.page-header {
    text-align: center;
    padding: var(--space-xl) 0 var(--space-lg);
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: var(--space-sm);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--space-lg) 0;
    margin-top: var(--space-xl);
    border-top: 1px solid var(--color-card-border);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(41, 128, 185, 0.95);
        padding: var(--space-md);
        text-align: center;
    }
    .nav-links.active {
        display: flex;
    }
    .menu-toggle {
        display: block;
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .page-header h1 {
        font-size: 2.5rem;
    }
}