:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --primary-light: #dbeafe;
    --secondary: #0ea5e9;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Hind Siliguri', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ========== AUTH PAGES (Login, Register) ========== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    background: linear-gradient(135deg, #1e40af 0%, #0ea5e9 100%);
    position: relative;
    overflow: hidden;
}

.auth-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.auth-container {
    margin: auto;
    width: 100%;
    max-width: 450px;
    padding: 24px;
    position: relative;
    z-index: 1;
}

.auth-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.6s ease-out;
}

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

.auth-logo {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 32px;
    box-shadow: 0 10px 20px rgba(30, 64, 175, 0.3);
}

.auth-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.auth-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 15px;
    margin-bottom: 32px;
}

/* ========== FORM ELEMENTS ========== */
.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
    font-size: 14px;
}

.form-control, .form-select {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 15px;
    transition: var(--transition);
    background: white;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
    outline: none;
}

.input-group-text {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-right: none;
    color: var(--gray-500);
    padding: 12px 16px;
}

.input-group .form-control {
    border-left: none;
}

.input-group:focus-within .input-group-text {
    border-color: var(--primary);
    color: var(--primary);
}

/* ========== BUTTONS ========== */
.btn {
    border-radius: var(--radius);
    padding: 12px 24px;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 64, 175, 0.4);
    color: white;
}

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

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

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

/* ========== ALERT/FLASH MESSAGES ========== */
.alert {
    border-radius: var(--radius);
    border: none;
    padding: 14px 18px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--primary);
}

/* ========== AUTH FOOTER LINK ========== */
.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--gray-500);
    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ========== NAVBAR ========== */
.navbar-custom {
    background: white;
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
}

.navbar-brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

/* ========== DASHBOARD ========== */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}

.welcome-banner::before {
    content: '';
    position: absolute;
    right: -50px;
    top: -50px;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 12px;
}

.stat-icon.pending { background: #fef3c7; color: #d97706; }
.stat-icon.confirmed { background: #d1fae5; color: #059669; }
.stat-icon.cancelled { background: #fee2e2; color: #dc2626; }
.stat-icon.total { background: #dbeafe; color: #2563eb; }

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
    line-height: 1;
}

.stat-label {
    color: var(--gray-500);
    font-size: 14px;
    margin-top: 4px;
}

/* ========== BADGE ========== */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
}

/* ========== MOBILE RESPONSIVE ========== */
@media (max-width: 768px) {
    .auth-card {
        padding: 28px 20px;
    }
    
    .auth-title {
        font-size: 20px;
    }
    
    .welcome-banner {
        padding: 20px;
    }
    
    .stat-card {
        padding: 18px;
    }
    
    .stat-value {
        font-size: 22px;
    }
    
    .btn {
        padding: 10px 18px;
        font-size: 14px;
    }
    
    .form-control, .form-select {
        font-size: 16px; /* iOS এ auto-zoom বন্ধ */
    }
}

/* Touch-friendly tap targets */
@media (hover: none) {
    .btn:hover {
        transform: none;
    }
}

/* PIN input বিশেষ স্টাইল */
.pin-input {
    letter-spacing: 8px;
    font-size: 20px;
    text-align: center;
    font-weight: 600;
}

/* Loading spinner */
.spinner-mini {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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