/* --- CSS Custom Properties (Enhanced Modern Theme) --- */
:root {
    /* Primary Colors */
    --primary-red: #ff0a16;
    --primary-red-hover: #ff3845;
    --primary-red-light: rgba(255, 10, 22, 0.1);
    --primary-red-glow: rgba(255, 10, 22, 0.3);
    
    /* Background Colors */
    --bg-main: #0a0a0a;
    --bg-card: #111111;
    --bg-elevated: #1a1a1a;
    --bg-input: #1f1f1f;
    --bg-overlay: rgba(0, 0, 0, 0.8);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #666666;
    --text-accent: var(--primary-red);
    
    /* Border & Effects */
    --border-primary: #2a2a2a;
    --border-accent: var(--primary-red);
    --border-radius-xs: 6px;
    --border-radius-sm: 10px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Shadows & Glows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --glow-red: 0 0 20px var(--primary-red-glow);
    --glow-soft: 0 0 40px rgba(255, 255, 255, 0.05);
    
    /* Animations */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* --- Global Reset & Base Styles --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--bg-main) 0%, #0d0d0d 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 20px;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background Particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 10, 22, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 10, 22, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.01) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: floatBackground 20s ease-in-out infinite alternate;
}

@keyframes floatBackground {
    0% { transform: translateY(0px) rotate(0deg); }
    100% { transform: translateY(-10px) rotate(1deg); }
}

/* --- Modern Layout --- */
.container {
    max-width: 1000px; /* ลดความกว้างสูงสุดจาก 1200px */
    margin: 0 auto;
}

.header {
    text-align: center;
    padding: 40px 20px; /* ลดระยะห่าง padding */
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--primary-red-glow), transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    z-index: -1;
}

.header h1 {
    font-size: 2.8rem; /* ลดขนาดฟอนต์ h1 */
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-red) 0%, #ff6b75 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    animation: glow 2s ease-in-out infinite alternate;
    color: var(--primary-red);
}

@keyframes glow {
    from { filter: drop-shadow(0 0 5px var(--primary-red-glow)); }
    to { filter: drop-shadow(0 0 15px var(--primary-red-glow)); }
}

.header p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    font-weight: 400;
    opacity: 0.9;
}

.content {
    background: var(--bg-card);
    background-color: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 25px 30px; /* ลดระยะห่าง padding */
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-red), transparent);
    opacity: 0.5;
}

.section-title {
    font-size: 1.6rem; /* ลดขนาดฟอนต์ */
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-red), var(--primary-red-hover));
    border-radius: 2px;
}

/* --- Enhanced Buttons --- */
.nav-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 35px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    text-transform: capitalize;
    letter-spacing: 0.5px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-hover) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-md), var(--glow-red);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--border-primary);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--bg-input);
    border-color: var(--primary-red);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: linear-gradient(135deg, #00c851 0%, #00ff32 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 200, 81, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #666 0%, #888 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #888 0%, #aaa 100%);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, #ffbb33 0%, #ffc107 100%);
    color: #000;
    font-weight: 700;
}

.btn-warning:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.3);
}

/* --- Modern Forms --- */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 35px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group-inline {
    display: flex;
    gap: 15px;
    align-items: end;
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-input);
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 4px var(--primary-red-light);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* --- Enhanced Player Search Grid --- */
.player-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 20px;
    max-height: 450px;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg-elevated);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-primary);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-red) var(--bg-input);
}

.player-list-grid::-webkit-scrollbar {
    width: 6px;
}

.player-list-grid::-webkit-scrollbar-track {
    background: var(--bg-input);
    border-radius: 3px;
}

.player-list-grid::-webkit-scrollbar-thumb {
    background: var(--primary-red);
    border-radius: 3px;
}

.player-card {
    padding: 18px 22px;
    background: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-bounce);
    text-align: center;
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.player-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-red-light), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.player-card:hover::before {
    opacity: 1;
}

.player-card:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--primary-red);
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-md), var(--glow-red);
}

/* --- Modern Calendar --- */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
    margin: 25px 0;
    padding: 20px;
    background: var(--bg-elevated);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-primary);
}

.day-cell {
    aspect-ratio: 1;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
    background: var(--bg-input);
    border: 2px solid var(--border-primary);
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.day-cell::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.day-cell:hover::before {
    opacity: 1;
}

.day-cell:hover { 
    transform: scale(1.1); 
    box-shadow: 0 0 15px var(--shadow-color); 
    z-index: 2; 
}

.day-cell.present { 
    background-color: #28a745;
    border-color: #28a745; 
}

.day-cell.leave { 
    background-color: #ffa500; 
    border-color: #ffa500; 
}
.day-cell.absent { 
    background-color: var(--primary-red);
    border-color: var(--primary-red); 
}
.day-cell.selected { 
    border-color: var(--text-light); 
    transform: scale(1.1); 
    box-shadow: 0 0 15px var(--text-light); 
}

/* --- Enhanced User Cards --- */
.user-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.user-card {
    background: var(--bg-elevated);
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-md);
    padding: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.user-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-red-light), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.user-card:hover::before {
    opacity: 1;
}

.user-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary-red);
    box-shadow: var(--shadow-lg), var(--glow-red);
}

.user-card .player-name {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--text-primary);
    flex-grow: 1;
    z-index: 1;
    position: relative;
}

.user-card .player-name-input {
    font-size: 1.3em;
    font-weight: 700;
    flex-grow: 1;
    margin-right: 15px;
    padding: 12px 16px;
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-smooth);
}

.user-card .player-name-input:focus {
    border-color: var(--primary-red);
    box-shadow: 0 0 0 4px var(--primary-red-light);
}

.user-card .card-actions {
    display: flex;
    gap: 12px;
    z-index: 1;
    position: relative;
}

.card-actions .btn {
    padding: 10px 16px;
    font-size: 14px;
}

/* --- Enhanced Statistics Cards --- */
.summary-card {
    background: var(--bg-elevated);
    padding: 35px;
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-lg);
    margin-bottom: 45px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-red), var(--primary-red-hover), var(--primary-red));
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.summary-item {
    background: var(--bg-card);
    padding: 30px;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 2px solid var(--border-primary);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.summary-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, var(--primary-red-light), transparent 70%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.summary-item:hover::before {
    opacity: 1;
}

.summary-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-red);
    box-shadow: var(--shadow-md);
}

.summary-value {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.summary-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
}

/* --- Enhanced Player Statistics --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
}

.stat-player-card {
    background: var(--bg-elevated);
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-lg);
    padding: 30px 25px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.stat-player-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-red-light), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.stat-player-card:hover::before {
    opacity: 1;
}

.stat-player-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-red);
}

/* Enhanced Ranking Badges */
    .ranking-badge {
        position: absolute;
        top: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
        border-radius: 50%;
        border: 3px solid rgba(255, 255, 255, 0.2);
        font-size: 1.2rem;
        font-weight: 900;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        line-height: 1;
        z-index: 10;
        transition: var(--transition-smooth);
    }

.ranking-badge:hover {
    transform: scale(1.1) rotate(10deg);
}

.ranking-badge.top-1 {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    color: #000;
    box-shadow: 0 0 25px #ffd700;
    animation: goldGlow 2s ease-in-out infinite alternate;
}

@keyframes goldGlow {
    from { box-shadow: 0 0 25px #ffd700; }
    to { box-shadow: 0 0 35px #ffd700, 0 0 50px rgba(255, 215, 0, 0.5); }
}

.ranking-badge.top-3 {
    background: linear-gradient(135deg, #e0e0e0 0%, #c0c0c0 100%);
    color: #000;
    box-shadow: 0 0 20px #c0c0c0;
}

.ranking-badge.top-10 {
    background: linear-gradient(135deg, #cd7f32 0%, #d4af37 100%);
    color: white;
    box-shadow: 0 0 20px #cd7f32;
}

.stat-player-card .player-name {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-primary);
    text-align: left;
    padding-right: 75px;
    position: relative;
    z-index: 1;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    font-size: 1.1em;
    padding: 8px 0;
    position: relative;
    z-index: 1;
}

.stat-value.present {
    color: #00ff32;
    font-weight: 700;
}

.stat-value.leave {
    color: #ffb300;
    font-weight: 700;
}

.stat-value.absent {
    color: var(--primary-red);
    font-weight: 700;
}

.stat-value.percentage {
    color: var(--primary-red);
    font-size: 1.5em;
    font-weight: 900;
    text-shadow: 0 0 10px var(--primary-red-glow);
}

/* Enhanced Ranking Backgrounds */
.stat-player-card.rank-top-1 {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.08), var(--bg-elevated) 70%);
    border-color: #ffd700;
}

.stat-player-card.rank-top-3 {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.08), var(--bg-elevated) 70%);
    border-color: #c0c0c0;
}

.stat-player-card.rank-top-10 {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.08), var(--bg-elevated) 70%);
    border-color: #cd7f32;
}

/* --- Enhanced Messages & Loading --- */
.message-box {
    padding: 25px;
    border-radius: var(--border-radius-md);
    margin: 25px 0;
    border: 2px solid;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.message-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: currentColor;
}

.message-box.error {
    background: rgba(229, 9, 20, 0.1);
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.message-box.success {
    background: rgba(40, 167, 69, 0.1);
    border-color: #28a745;
    color: #28a745;
}

.message-box.warning {
    background: rgba(255, 193, 7, 0.1);
    border-color: #ffc107;
    color: #ffc107;
}

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
    font-size: 1.4em;
    font-weight: 600;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-primary);
    border-top: 4px solid var(--primary-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 25px;
    box-shadow: var(--glow-red);
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- Responsive Enhancements --- */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    .content {
        padding: 25px;
        border-radius: var(--border-radius-md);
    }
    
    .header {
        padding: 40px 15px;
    }
    
    .header h1 {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .nav-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        padding: 16px 24px;
        justify-content: center;
    }
    
    .calendar-grid {
        display: grid;
        /* แก้ไข: กำหนดขนาดคอลัมน์ให้เล็กลงและจัดกลาง */
        grid-template-columns: repeat(7, 60px); 
        justify-content: center;
        gap: 8px;
        margin: 20px 0;
    }
    
    .day-cell {
        aspect-ratio: 1;
        border-radius: var(--border-radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        font-weight: 600;
        font-size: 1rem;
        color: white;
        background-color: var(--bg-input); 
        border: 1px solid var(--border-color);
        transition: all 0.2s ease;
    }
    
    .user-card-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .player-list-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
gap: 12px;
       padding: 15px;
       max-height: 350px;
   }
   
   .ranking-badge {
       width: 45px;
       height: 45px;
       font-size: 1rem;
       top: 15px;
       right: 15px;
   }
   
   .stat-player-card .player-name {
       font-size: 1.4rem;
       padding-right: 60px;
   }
   
   .summary-grid {
       grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
       gap: 20px;
   }
   
   .summary-value {
       font-size: 2.5rem;
   }
}

@media (max-width: 480px) {
   .header h1 {
       font-size: 2rem;
   }
   
   .content {
       padding: 20px;
   }
   
   .form-group-inline {
       flex-direction: column;
       align-items: stretch;
   }
   
   .calendar-grid {
       gap: 6px;
       padding: 10px;
   }
   
   .day-cell {
       font-size: 0.9rem;
   }
   
   .player-list-grid {
       grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
       gap: 10px;
   }
   
   .user-card {
       padding: 20px;
       flex-direction: column;
       gap: 15px;
       text-align: center;
   }
   
   .user-card .player-name,
   .user-card .player-name-input {
       margin-right: 0;
       margin-bottom: 10px;
   }
}

/* --- Advanced Animations & Micro-interactions --- */
@keyframes fadeInUp {
   from {
       opacity: 0;
       transform: translateY(30px);
   }
   to {
       opacity: 1;
       transform: translateY(0);
   }
}

@keyframes fadeInScale {
   from {
       opacity: 0;
       transform: scale(0.8);
   }
   to {
       opacity: 1;
       transform: scale(1);
   }
}

@keyframes slideInRight {
   from {
       opacity: 0;
       transform: translateX(50px);
   }
   to {
       opacity: 1;
       transform: translateX(0);
   }
}

/* Apply animations to elements */
.content {
   animation: fadeInUp 0.6s ease-out;
}

.player-card {
   animation: fadeInScale 0.4s ease-out;
   animation-fill-mode: both;
}

.player-card:nth-child(odd) {
   animation-delay: 0.1s;
}

.player-card:nth-child(even) {
   animation-delay: 0.2s;
}

.day-cell {
   animation: fadeInScale 0.3s ease-out;
   animation-fill-mode: both;
}

.user-card,
.stat-player-card {
   animation: slideInRight 0.5s ease-out;
   animation-fill-mode: both;
}

.summary-item {
   animation: fadeInScale 0.4s ease-out;
   animation-fill-mode: both;
}

.summary-item:nth-child(1) { animation-delay: 0.1s; }
.summary-item:nth-child(2) { animation-delay: 0.2s; }
.summary-item:nth-child(3) { animation-delay: 0.3s; }
.summary-item:nth-child(4) { animation-delay: 0.4s; }

/* --- Custom Scrollbar for all scrollable elements --- */
* {
   scrollbar-width: thin;
   scrollbar-color: var(--primary-red) var(--bg-input);
}

*::-webkit-scrollbar {
   width: 8px;
   height: 8px;
}

*::-webkit-scrollbar-track {
   background: var(--bg-input);
   border-radius: 4px;
}

*::-webkit-scrollbar-thumb {
   background: linear-gradient(135deg, var(--primary-red), var(--primary-red-hover));
   border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
   background: linear-gradient(135deg, var(--primary-red-hover), var(--primary-red));
}

/* --- Enhanced Focus States for Accessibility --- */
.btn:focus,
.form-control:focus,
.player-card:focus,
.day-cell:focus {
   outline: 3px solid rgba(255, 10, 22, 0.5);
   outline-offset: 2px;
}

/* --- Loading States for Better UX --- */
.btn.loading {
   position: relative;
   color: transparent;
   pointer-events: none;
}

.btn.loading::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   width: 20px;
   height: 20px;
   margin: -10px 0 0 -10px;
   border: 2px solid transparent;
   border-top-color: currentColor;
   border-radius: 50%;
   animation: spin 1s linear infinite;
}

/* --- Glassmorphism Effects --- */
.content,
.summary-card,
.stat-player-card,
.user-card {
   backdrop-filter: blur(20px);
   -webkit-backdrop-filter: blur(20px);
}

/* --- Improved Typography Hierarchy --- */
h1, h2, h3, h4, h5, h6 {
   font-weight: 700;
   line-height: 1.2;
   margin-bottom: 1rem;
}

p {
   margin-bottom: 1rem;
   line-height: 1.6;
   color: var(--text-secondary);
}

/* --- Interactive Hover Effects --- */
.interactive-hover {
   transition: var(--transition-smooth);
}

.interactive-hover:hover {
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

/* --- Custom Selection Colors --- */
::selection {
   background: var(--primary-red);
   color: white;
}

::-moz-selection {
   background: var(--primary-red);
   color: white;
}

/* --- Print Styles --- */
@media print {
   body {
       background: white;
       color: black;
   }
   
   .content {
       box-shadow: none;
       border: 1px solid #ccc;
   }
   
   .btn {
       display: none;
   }
}

/* --- Dark Mode Enhancements --- */
@media (prefers-color-scheme: dark) {
   :root {
       --bg-main: #000000;
       --bg-card: #0a0a0a;
       --text-primary: #ffffff;
   }
}

/* --- Reduced Motion Support --- */
@media (prefers-reduced-motion: reduce) {
   *,
   *::before,
   *::after {
       animation-duration: 0.01ms !important;
       animation-iteration-count: 1 !important;
       transition-duration: 0.01ms !important;
   }
}

.day-cell.changed {
    box-shadow: 0 0 0 3px var(--text-light);
    transform: scale(1.05);
}