/**
 * STDENT Core - Main Stylesheet
 * Optimized for Performance
 * 
 * @package STDENT_Core
 * @version 1.0.0
 */

/* ===================================
   CSS VARIABLES (Brand Colors)
   =================================== */
:root {
    /* Primary Colors */
    --stdent-dark: #0E0E0E;
    --stdent-red-dark: #B21739;
    --stdent-red-vibrant: #E3264F;
    
    /* Complementary Colors */
    --stdent-purple: #AA00AA;
    --stdent-blue: #279AF1;
    --stdent-light: #F1F1F1;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #E3264F 0%, #B21739 100%);
    --gradient-rpg: linear-gradient(135deg, #AA00AA 0%, #B21739 100%);
    --gradient-skywars: linear-gradient(135deg, #279AF1 0%, #AA00AA 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--stdent-dark);
    color: var(--stdent-light);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   BUTTONS
   =================================== */
.stdent-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    transform: translateZ(0);
    will-change: transform;
}

.stdent-btn-primary {
    background: var(--gradient-primary);
    color: var(--stdent-light);
    box-shadow: 0 4px 15px rgba(227, 38, 79, 0.4);
}

.stdent-btn-primary:hover {
    transform: translateY(-2px) translateZ(0);
    box-shadow: 0 6px 20px rgba(227, 38, 79, 0.6);
}

.stdent-btn-xbox {
    background: #107C10;
    color: white;
    box-shadow: 0 4px 15px rgba(16, 124, 16, 0.4);
}

.stdent-btn-xbox:hover {
    background: #0e6b0e;
    transform: translateY(-2px) translateZ(0);
    box-shadow: 0 6px 20px rgba(16, 124, 16, 0.6);
}

.stdent-btn svg {
    width: 20px;
    height: 20px;
}

/* ===================================
   CARDS
   =================================== */
.stdent-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.stdent-card:hover {
    border-color: var(--stdent-red-vibrant);
    box-shadow: 0 8px 32px rgba(227, 38, 79, 0.2);
    transform: translateY(-4px);
}

.stdent-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stdent-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   SERVER STATUS
   =================================== */
.stdent-server-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stdent-server-status.online .status-indicator {
    width: 12px;
    height: 12px;
    background: #00FF00;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.stdent-server-status.offline .status-indicator {
    width: 12px;
    height: 12px;
    background: #FF0000;
    border-radius: 50%;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.status-text {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    opacity: 0.8;
}

.players-count {
    color: var(--stdent-blue);
}

/* ===================================
   PLAYER PROFILE
   =================================== */
.stdent-profile-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.stdent-profile-avatar {
    width: 128px;
    height: 128px;
    border: 4px solid var(--stdent-light);
    border-radius: var(--radius-md);
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

.stdent-profile-info h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.stdent-profile-rank {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===================================
   STATISTICS
   =================================== */
.stdent-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stdent-stat-item {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--stdent-red-vibrant);
}

.stdent-stat-label {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-bottom: var(--spacing-xs);
}

.stdent-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--stdent-red-vibrant);
}

.stdent-stat-item.skywars {
    border-left-color: var(--stdent-blue);
}

.stdent-stat-item.skywars .stdent-stat-value {
    color: var(--stdent-blue);
}

.stdent-stat-item.rpg {
    border-left-color: var(--stdent-purple);
}

.stdent-stat-item.rpg .stdent-stat-value {
    color: var(--stdent-purple);
}

/* ===================================
   LEADERBOARD
   =================================== */
.stdent-leaderboard {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.stdent-leaderboard-header {
    padding: var(--spacing-md);
    background: var(--gradient-primary);
    font-weight: 700;
}

.stdent-leaderboard-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-fast);
}

.stdent-leaderboard-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.stdent-leaderboard-rank {
    font-size: 1.5rem;
    font-weight: 700;
    min-width: 40px;
    text-align: center;
}

.stdent-leaderboard-rank.rank-1 { color: #FFD700; }
.stdent-leaderboard-rank.rank-2 { color: #C0C0C0; }
.stdent-leaderboard-rank.rank-3 { color: #CD7F32; }

.stdent-leaderboard-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    image-rendering: pixelated;
}

.stdent-leaderboard-player {
    flex: 1;
}

.stdent-leaderboard-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.stdent-leaderboard-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--stdent-red-vibrant);
}

/* ===================================
   ACHIEVEMENTS
   =================================== */
.stdent-achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.stdent-achievement {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.stdent-achievement.unlocked {
    border-color: var(--stdent-red-vibrant);
    background: rgba(227, 38, 79, 0.1);
}

.stdent-achievement.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.stdent-achievement-icon {
    font-size: 2.5rem;
}

.stdent-achievement-info {
    flex: 1;
}

.stdent-achievement-name {
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stdent-achievement-description {
    font-size: 0.875rem;
    opacity: 0.7;
}

.stdent-achievement-points {
    color: var(--stdent-red-vibrant);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===================================
   LOADING ANIMATION
   =================================== */
.stdent-loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--stdent-red-vibrant);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    .stdent-profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .stdent-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stdent-achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .stdent-leaderboard-rank {
        min-width: 30px;
        font-size: 1.25rem;
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.stdent-text-center { text-align: center; }
.stdent-text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stdent-mb-sm { margin-bottom: var(--spacing-sm); }
.stdent-mb-md { margin-bottom: var(--spacing-md); }
.stdent-mb-lg { margin-bottom: var(--spacing-lg); }
.stdent-mt-sm { margin-top: var(--spacing-sm); }
.stdent-mt-md { margin-top: var(--spacing-md); }
.stdent-mt-lg { margin-top: var(--spacing-lg); }

/* ===================================
   ACCESSIBILITY
   =================================== */
.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;
}

/* Focus styles */
a:focus,
button:focus,
input:focus {
    outline: 2px solid var(--stdent-red-vibrant);
    outline-offset: 2px;
}