/* 
 * Professional Faculty Portal Design System
 * Modern, clean, and corporate styling
 */

:root {
    /* Primary Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-lighter: #60a5fa;
    
    /* Secondary Colors */
    --secondary-color: #8b5cf6;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Layout */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

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

body.faculty-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--gray-900);
    line-height: 1.6;
}

.faculty-container {
    width: 100%;
    max-width: 480px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
}

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

/* Header Styles */
.faculty-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 40px 30px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.faculty-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 15s ease-in-out infinite;
}

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

.faculty-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}

.faculty-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.faculty-header p {
    font-size: 15px;
    opacity: 0.95;
    font-weight: 400;
    position: relative;
    z-index: 1;
}

/* Form Container */
.faculty-content {
    padding: 40px 30px;
}

.form-section {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.form-section.active {
    display: block;
}

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

.section-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.section-description {
    color: var(--gray-600);
    font-size: 14px;
    margin-bottom: 30px;
}

/* Form Groups */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-label .required {
    color: var(--error-color);
    margin-left: 2px;
}

.form-input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    background: var(--gray-50);
    color: var(--gray-900);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.input-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 18px;
    pointer-events: none;
}

.form-input:focus + .input-icon {
    color: var(--primary-color);
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--primary-color);
}

.btn-link {
    background: none;
    color: var(--primary-color);
    text-decoration: none;
    padding: 8px 0;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Alert Messages */
.alert {
    padding: 14px 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 500;
    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(--accent-color);
}

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

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

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-icon {
    font-size: 20px;
    flex-shrink: 0;
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 30px 0;
    color: var(--gray-500);
    font-size: 14px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--gray-200);
}

.divider::before {
    margin-right: 16px;
}

.divider::after {
    margin-left: 16px;
}

/* Footer */
.faculty-footer {
    text-align: center;
    padding: 24px 30px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.faculty-footer p {
    color: var(--gray-600);
    font-size: 14px;
}

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

.faculty-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* OTP Input Section */
.otp-display {
    background: var(--gray-50);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 24px;
    border-left: 4px solid var(--primary-color);
}

.otp-display-label {
    font-size: 13px;
    color: var(--gray-600);
    margin-bottom: 4px;
}

.otp-display-email {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
}

.otp-input-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 24px 0;
}

.otp-input {
    width: 56px;
    height: 64px;
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    background: var(--gray-50);
    transition: var(--transition);
}

.otp-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.resend-otp-section {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.resend-otp-text {
    color: var(--gray-600);
    font-size: 14px;
    margin-bottom: 8px;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--gray-500);
}

.text-small {
    font-size: 13px;
}

.mt-2 {
    margin-top: 16px;
}

.mb-2 {
    margin-bottom: 16px;
}

.hidden {
    display: none !important;
}

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

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

/* Responsive Design */
@media (max-width: 480px) {
    .faculty-container {
        max-width: 100%;
    }
    
    .faculty-content {
        padding: 30px 20px;
    }
    
    .faculty-header {
        padding: 30px 20px;
    }
    
    .otp-input {
        width: 48px;
        height: 56px;
        font-size: 20px;
    }
}

/* Dashboard Specific Styles */
.dashboard-nav {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-nav-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.dashboard-nav-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
}

.user-info {
    text-align: right;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-900);
}

.user-email {
    font-size: 12px;
    color: var(--gray-500);
}

/* Info Box */
.info-box {
    background: var(--gray-50);
    border-left: 4px solid var(--primary-color);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 24px;
}

.info-box-title {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-box-content {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.6;
}