:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 480px;
}

.auth-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.5s ease;
}

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

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
margin-bottom: 5px;
    font-size: 26px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.logo i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 15px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 0;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--primary-color);
}

.form-group input {
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--light-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.password-input {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input input {
    flex: 1;
    padding-right: 48px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 10px;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f3f4f6;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #e5e7eb;
    transform: scale(1.02);
}

.auth-footer {
    margin-top: 30px;
    text-align: center;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.auth-footer p {
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

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

.demo-credentials {
    margin-top: 30px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: 12px;
    border: 2px dashed var(--primary-color);
}

.demo-credentials h3 {
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.demo-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.demo-item {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 8px 12px;
    background: white;
    border-radius: 8px;
}

.demo-item strong {
    color: var(--text-primary);
}

/* Toast Notification */
.toast {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    right: auto;
    bottom: auto;
    background: white;
    color: var(--text-primary);
    padding: 20px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 10001;
    transition: top 0.4s ease, opacity 0.4s ease;
    border-left: 5px solid var(--primary-color);
    min-width: 300px;
    max-width: 90%;
    opacity: 0;
    pointer-events: none;
}

.toast.show {
    top: 30px;
    opacity: 1;
    pointer-events: auto;
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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

/* Forgot Password Link */
.forgot-password-link {
    text-align: center;
    margin-top: 15px;
}

.forgot-password-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
}

.forgot-password-link a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Info Box */
.info-box {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: 12px;
    padding: 15px 20px;
    margin-bottom: 25px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.info-box i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 2px;
}

.info-box p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0;
}

/* Profile Picture Upload */
.profile-picture-upload {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.profile-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--border-color);
    margin: 0 auto;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.profile-preview:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.profile-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-input-wrapper input[type="file"] {
    display: none;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.file-input-label:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transform: scale(1.02);
}

.file-input-label:active {
    transform: scale(0.98);
}

/* Mobile-specific improvements for file upload */
@media (max-width: 768px) {
    .file-input-label {
        min-height: 44px;
        touch-action: manipulation;
        -webkit-touch-callout: none;
    }
    
    .file-input-wrapper {
        position: relative;
    }
}

.file-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .auth-card {
        padding: 20px 12px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .toast {
        right: 10px;
        left: 10px;
        min-width: auto;
    }

    .toast.show {
        bottom: 10px;
    }
    
    .profile-preview {
        width: 100px;
        height: 100px;
    }
}

/* ============================================
   Logout Confirmation Modal
   ============================================ */
.confirm-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.confirm-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.confirm-modal-content {
    position: relative;
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
    overflow: hidden;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.confirm-modal-header {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: 24px 28px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.confirm-modal-header i {
    font-size: 28px;
    animation: pulse 2s ease infinite;
}

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

.confirm-modal-header h3 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.confirm-modal-header-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
}

.confirm-modal-body {
    padding: 32px 28px;
}

.confirm-modal-body p {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.confirm-modal-footer {
    padding: 20px 28px 28px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.confirm-modal-footer button {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 120px;
    justify-content: center;
}

.btn-cancel {
    background: #e5e7eb;
    color: #374151;
}

.btn-cancel:hover {
    background: #d1d5db;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-confirm {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.btn-confirm:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.4);
}

.btn-confirm:active,
.btn-cancel:active {
    transform: scale(0.98);
}

/* Responsive */
@media (max-width: 768px) {
    /* Toast notification - mobile adjustments */
    .toast {
        top: -100px;
        left: 50%;
        transform: translateX(-50%);
        right: auto;
        bottom: auto;
        min-width: auto;
        max-width: calc(100% - 30px);
        width: auto;
        padding: 15px 20px;
        font-size: 14px;
    }
    
    .toast.show {
        top: 20px;
        bottom: auto;
        opacity: 1;
    }
    
    .confirm-modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .confirm-modal-header {
        padding: 20px;
    }
    
    .confirm-modal-header h3 {
        font-size: 1.2rem;
    }
    
    .confirm-modal-body {
        padding: 24px 20px;
    }
    
    .confirm-modal-body p {
        font-size: 1rem;
    }
    
    .confirm-modal-footer {
        padding: 16px 20px 20px;
        flex-direction: row;
    }
    
    .confirm-modal-footer button {
        width: 100%;
    }
}