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

:root {
    /* Modern Color Palette */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-bg: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    
    --bg-dark: #1a1a2e;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    
    --text-primary: #ffffff;
    --text-secondary: #b8b8d1;
    --text-muted: #8888a8;
    
    --primary-color: #667eea;
    --primary-hover: #5568d3;
    --accent-color: #f5576c;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(102, 126, 234, 0.5);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    background: var(--gradient-bg);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background Elements */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* Navbar */
.navbar {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.brand {
    font-size: 1.75rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform var(--transition-fast);
}

.brand:hover {
    transform: scale(1.05);
}

.brand::before {
    content: '💪';
    font-size: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.5));
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(102, 126, 234, 0.1);
}

.nav-links a:hover::after {
    width: 80%;
}

/* Cards */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 30px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(102, 126, 234, 0.3);
}

.card h2 {
    margin-top: 0;
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease backwards;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-body);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

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

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px var(--border-focus);
    transform: translateY(-2px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* Login Page */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    padding: 40px 20px;
}

.login-card {
    width: 100%;
    max-width: 450px;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

.stat-card {
    text-align: center;
    padding: 40px 30px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

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

.stat-number {
    font-size: 4rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 10px 0;
    position: relative;
    z-index: 1;
    animation: countUp 1s ease;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-label {
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* Alert Messages */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-weight: 500;
    animation: slideInRight 0.4s ease;
    border-left: 4px solid;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border-color: #10b981;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-color: #ef4444;
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .brand {
        font-size: 1.5rem;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 2s ease-in-out infinite;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
}

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