/* ========================================
   সমিতি - Main Stylesheet
   Modern Glassmorphism Design System
======================================== */

/* CSS Custom Properties */
:root {
    /* Primary Colors */
    --primary-hue: 220;
    --primary: hsl(var(--primary-hue), 85%, 55%);
    --primary-light: hsl(var(--primary-hue), 85%, 65%);
    --primary-dark: hsl(var(--primary-hue), 85%, 45%);
    
    /* Secondary Colors */
    --secondary: hsl(260, 85%, 60%);
    --accent: hsl(340, 85%, 60%);
    
    /* Neutral Colors */
    --bg-dark: hsl(230, 25%, 8%);
    --bg-darker: hsl(230, 25%, 5%);
    --surface: hsl(230, 25%, 12%);
    --surface-light: hsl(230, 20%, 18%);
    
    /* Text Colors */
    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(230, 15%, 70%);
    --text-muted: hsl(230, 10%, 50%);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, hsl(30, 90%, 55%) 100%);
    --gradient-success: linear-gradient(135deg, hsl(160, 80%, 45%) 0%, hsl(190, 80%, 50%) 100%);
    --gradient-purple: linear-gradient(135deg, hsl(280, 80%, 55%) 0%, hsl(320, 80%, 55%) 100%);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(var(--primary-hue), 85%, 55%, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Hind Siliguri', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.25rem); }

/* ========================================
   Animated Background
======================================== */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    background: var(--bg-dark);
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    top: 50%;
    right: -150px;
    animation-delay: -5s;
}

.shape-3 {
    width: 350px;
    height: 350px;
    background: var(--accent);
    bottom: -100px;
    left: 30%;
    animation-delay: -10s;
}

.shape-4 {
    width: 300px;
    height: 300px;
    background: hsl(160, 80%, 50%);
    top: 30%;
    left: 50%;
    animation-delay: -15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(50px, 50px) rotate(90deg);
    }
    50% {
        transform: translate(0, 100px) rotate(180deg);
    }
    75% {
        transform: translate(-50px, 50px) rotate(270deg);
    }
}

/* ========================================
   Glass Card Component
======================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.1);
}

/* ========================================
   Login Page Styles
======================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-2xl);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-2xl);
    text-align: center;
}

/* Logo Section */
.logo-section {
    margin-bottom: var(--spacing-2xl);
}

.logo-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: white;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
    }
    50% {
        box-shadow: 0 10px 40px rgba(99, 102, 241, 0.6);
    }
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Login Form */
.login-form {
    margin-bottom: var(--spacing-xl);
}

.form-floating {
    position: relative;
}

.form-floating .form-control {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 1.5rem 1rem 0.5rem;
    height: auto;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-floating .form-control:focus {
    background: var(--surface-light);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    outline: none;
}

.form-floating .form-control::placeholder {
    color: transparent;
}

.form-floating label {
    color: var(--text-secondary);
    padding: 1rem;
    font-size: 0.95rem;
}

.form-floating .form-control:focus ~ label,
.form-floating .form-control:not(:placeholder-shown) ~ label {
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
    color: var(--primary-light);
}

/* Login Button */
.btn-login {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

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

/* Info Section */
.info-section {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.info-item i {
    font-size: 1.25rem;
    color: var(--primary-light);
}

/* Features Row */
.features-row {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
    max-width: 900px;
    width: 100%;
}

.feature-card {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    padding: var(--spacing-xl);
    text-align: center;
    transition: transform var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.5rem;
    color: white;
}

.gradient-1 { background: var(--gradient-primary); }
.gradient-2 { background: var(--gradient-success); }
.gradient-3 { background: var(--gradient-accent); }
.gradient-4 { background: var(--gradient-purple); }

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* ========================================
   Buttons
======================================== */
.btn {
    font-family: 'Hind Siliguri', sans-serif;
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-success {
    background: var(--gradient-success);
    border: none;
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(45, 212, 191, 0.4);
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary-light);
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: white;
}

.btn-outline-danger {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-outline-danger:hover {
    background: var(--accent);
    color: white;
}

/* ========================================
   Form Controls
======================================== */
.form-control,
.form-select {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-family: 'Hind Siliguri', sans-serif;
    transition: all var(--transition-normal);
}

.form-control:focus,
.form-select:focus {
    background: var(--surface-light);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
}

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

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23a0a0a0' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

/* Radio & Checkbox */
.form-check-input {
    background-color: var(--surface);
    border-color: var(--glass-border);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-label {
    color: var(--text-secondary);
}

/* ========================================
   Tables
======================================== */
.custom-table {
    color: var(--text-primary);
    margin: 0;
}

.custom-table thead {
    background: var(--surface);
}

.custom-table thead th {
    font-weight: 600;
    color: var(--text-secondary);
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    white-space: nowrap;
}

.custom-table tbody tr {
    transition: background var(--transition-fast);
}

.custom-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.custom-table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    vertical-align: middle;
}

/* ========================================
   Toast Notifications
======================================== */
.toast {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.toast-header {
    background: var(--surface-light);
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.toast-body {
    color: var(--text-secondary);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--surface-light);
    border-radius: 4px;
}

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

/* ========================================
   Utilities
======================================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-success-gradient {
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 768px) {
    .login-container {
        padding: var(--spacing-md);
    }
    
    .login-card {
        padding: var(--spacing-lg);
    }
    
    .features-row {
        gap: var(--spacing-md);
    }
    
    .feature-card {
        min-width: 100%;
        padding: var(--spacing-lg);
    }
    
    .info-section {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
}

@media (max-width: 576px) {
    .logo-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
}