/* ===== reset & base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* رنگ‌های تم روشن - بهینه شده */
    --light-bg: #f0f2f5;
    --light-surface: #ffffff;
    --light-card: #f8fafc;
    --light-text: #1e293b;
    --light-text-secondary: #64748b;
    --light-border: #e2e8f0;
    --light-primary: #3b82f6;
    --light-primary-hover: #2563eb;
    --light-success: #10b981;
    --light-danger: #ef4444;
    --light-warning: #f59e0b;
    --light-info: #6366f1;
    --light-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --light-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* رنگ‌های تم تیره - بهینه شده */
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-card: #334155;
    --dark-text: #f1f5f9;
    --dark-text-secondary: #cbd5e1;
    --dark-border: #475569;
    --dark-primary: #60a5fa;
    --dark-primary-hover: #3b82f6;
    --dark-success: #34d399;
    --dark-danger: #f87171;
    --dark-warning: #fbbf24;
    --dark-info: #818cf8;
    --dark-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --dark-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Vazir', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===== تم روشن ===== */
body.theme-light {
    background-color: var(--light-bg);
    color: var(--light-text);
}

body.theme-light .login-container,
body.theme-light .dashboard-header,
body.theme-light .dashboard-section,
body.theme-light .modal-content,
body.theme-light .settings-container {
    background-color: var(--light-surface);
    border: 1px solid var(--light-border);
    box-shadow: var(--light-shadow);
}

body.theme-light .note-item,
body.theme-light .file-item {
    background-color: var(--light-card);
    border: 1px solid var(--light-border);
    box-shadow: var(--light-shadow);
}

body.theme-light .note-item:hover,
body.theme-light .file-item:hover {
    box-shadow: var(--light-shadow-hover);
}

body.theme-light .add-form {
    background-color: var(--light-card);
    border: 1px solid var(--light-border);
}

body.theme-light .form-group input,
body.theme-light .form-group textarea,
body.theme-light .form-group select {
    background-color: var(--light-surface);
    border: 1px solid var(--light-border);
    color: var(--light-text);
}

body.theme-light .form-group input:focus,
body.theme-light .form-group textarea:focus {
    border-color: var(--light-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ===== تم تیره ===== */
body.theme-dark {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

body.theme-dark .login-container,
body.theme-dark .dashboard-header,
body.theme-dark .dashboard-section,
body.theme-dark .modal-content,
body.theme-dark .settings-container {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
    box-shadow: var(--dark-shadow);
}

body.theme-dark .note-item,
body.theme-dark .file-item {
    background-color: var(--dark-card);
    border: 1px solid var(--dark-border);
    box-shadow: var(--dark-shadow);
}

body.theme-dark .note-item:hover,
body.theme-dark .file-item:hover {
    box-shadow: var(--dark-shadow-hover);
}

body.theme-dark .add-form {
    background-color: var(--dark-card);
    border: 1px solid var(--dark-border);
}

body.theme-dark .form-group input,
body.theme-dark .form-group textarea,
body.theme-dark .form-group select {
    background-color: var(--dark-bg);
    border: 1px solid var(--dark-border);
    color: var(--dark-text);
}

body.theme-dark .form-group input:focus,
body.theme-dark .form-group textarea:focus {
    border-color: var(--dark-primary);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

body.theme-dark .btn-secondary {
    background-color: var(--dark-card);
    border: 1px solid var(--dark-border);
    color: var(--dark-text);
}

body.theme-dark .btn-secondary:hover {
    background-color: var(--dark-border);
}

/* ===== container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== login page ===== */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    border-radius: 16px;
}

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

.login-header h1 {
    font-size: 28px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--light-primary), var(--light-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-dark .login-header h1 {
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header p {
    color: var(--light-text-secondary);
    font-size: 14px;
}

.theme-dark .login-header p {
    color: var(--dark-text-secondary);
}

/* ===== alerts ===== */
.alert {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 14px;
    animation: slideIn 0.3s ease;
}

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

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--light-danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.theme-dark .alert-error {
    color: var(--dark-danger);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--light-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.theme-dark .alert-success {
    color: var(--dark-success);
}

/* ===== forms ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 14px;
    transition: all 0.3s;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    max-height: 500px;
}

.form-text {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--light-text-secondary);
}

.theme-dark .form-text {
    color: var(--dark-text-secondary);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* ===== buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

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

.theme-dark .btn-primary {
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--light-primary);
}

.theme-dark .btn-primary:hover {
    box-shadow: 0 10px 20px -10px var(--dark-primary);
}

.btn-success {
    background: linear-gradient(135deg, var(--light-success), #059669);
    color: white;
}

.theme-dark .btn-success {
    background: linear-gradient(135deg, var(--dark-success), #10b981);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--light-success);
}

.btn-danger {
    background: linear-gradient(135deg, var(--light-danger), #dc2626);
    color: white;
}

.theme-dark .btn-danger {
    background: linear-gradient(135deg, var(--dark-danger), #ef4444);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--light-danger);
}

.btn-secondary {
    background-color: var(--light-card);
    border: 1px solid var(--light-border);
    color: var(--light-text);
}

.theme-dark .btn-secondary {
    background-color: var(--dark-card);
    border: 1px solid var(--dark-border);
    color: var(--dark-text);
}

.btn-secondary:hover {
    background-color: var(--light-border);
}

.theme-dark .btn-secondary:hover {
    background-color: var(--dark-border);
}

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

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 20px;
    transition: all 0.3s;
    background: transparent;
    border: none;
    cursor: pointer;
}

.btn-icon:hover {
    background-color: rgba(0, 0, 0, 0.05);
    transform: scale(1.1);
}

.theme-dark .btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* ===== dashboard ===== */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    border-radius: 20px;
    margin-bottom: 30px;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-title h1 {
    font-size: 24px;
    background: linear-gradient(135deg, var(--light-primary), var(--light-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-dark .header-title h1 {
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-message {
    padding: 6px 12px;
    background: linear-gradient(135deg, var(--light-primary), var(--light-info));
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.theme-dark .welcome-message {
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
}

.header-actions {
    display: flex;
    gap: 10px;
}

.dashboard-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.dashboard-section {
    border-radius: 24px;
    padding: 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-border);
}

.theme-dark .section-header {
    border-bottom-color: var(--dark-border);
}

.section-header h2 {
    font-size: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ===== notes ===== */
.add-form {
    margin-bottom: 30px;
    padding: 25px;
    border-radius: 20px;
    animation: slideDown 0.3s ease;
}

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

.notes-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.note-item {
    padding: 20px;
    border-radius: 16px;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    height: fit-content;
    max-width: 100%;
}

.note-item:hover {
    transform: translateY(-4px);
}

.note-content {
    margin-bottom: 15px;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 15px;
    line-height: 1.7;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;
}

/* اسکرول بار سفارشی */
.note-content::-webkit-scrollbar {
    width: 6px;
}

.note-content::-webkit-scrollbar-track {
    background: transparent;
}

.note-content::-webkit-scrollbar-thumb {
    background: var(--light-border);
    border-radius: 20px;
}

.theme-dark .note-content::-webkit-scrollbar-thumb {
    background: var(--dark-border);
}

.note-content::-webkit-scrollbar-thumb:hover {
    background: var(--light-text-secondary);
}

.theme-dark .note-content::-webkit-scrollbar-thumb:hover {
    background: var(--dark-text-secondary);
}

.note-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--light-border);
    margin-top: auto;
}

.theme-dark .note-meta {
    border-top-color: var(--dark-border);
}

.note-actions {
    display: flex;
    gap: 8px;
}

.note-date {
    color: var(--light-text-secondary);
    font-size: 12px;
    background: var(--light-border);
    padding: 4px 10px;
    border-radius: 20px;
}

.theme-dark .note-date {
    color: var(--dark-text-secondary);
    background: var(--dark-border);
}

/* ===== files ===== */
.files-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px;
    border-radius: 16px;
    transition: all 0.3s;
}

.file-item:hover {
    transform: translateY(-4px);
}

.file-icon {
    font-size: 32px;
    min-width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-primary);
    color: white;
    border-radius: 12px;
    padding: 8px;
}

.theme-dark .file-icon {
    background: var(--dark-primary);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 15px;
}

.file-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--light-text-secondary);
}

.theme-dark .file-meta {
    color: var(--dark-text-secondary);
}

.file-size, .file-date {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.file-actions {
    display: flex;
    gap: 8px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.file-item:hover .file-actions {
    opacity: 1;
}

/* ===== loading indicator ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--light-primary);
    animation: spin 1s ease-in-out infinite;
}

.theme-dark .loading {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--dark-primary);
}

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

/* ===== empty state ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--light-text-secondary);
    background: var(--light-card);
    border-radius: 20px;
    border: 2px dashed var(--light-border);
}

.theme-dark .empty-state {
    color: var(--dark-text-secondary);
    background: var(--dark-card);
    border-color: var(--dark-border);
}

.empty-state p {
    font-size: 16px;
    margin-top: 10px;
}

.empty-state::before {
    content: '📭';
    font-size: 48px;
    display: block;
    margin-bottom: 15px;
}

/* ===== modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

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

.modal .modal-content {
    position: relative;
    max-width: 700px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 35px;
    border-radius: 24px;
    animation: scaleIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 15px;
    left: 20px;
    font-size: 28px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.modal-close:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--light-danger);
    transform: rotate(90deg);
}

.theme-dark .modal-close:hover {
    color: var(--dark-danger);
}

#modal-image {
    max-width: 100%;
    max-height: 70vh;
    display: block;
    margin: 20px auto 0;
    border-radius: 12px;
}

/* ===== settings page ===== */
.settings-container {
    max-width: 600px;
    margin: 50px auto;
    padding: 40px;
    border-radius: 24px;
}

.settings-header {
    text-align: center;
    margin-bottom: 40px;
}

.settings-header h2 {
    font-size: 28px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--light-primary), var(--light-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-dark .settings-header h2 {
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.settings-form {
    margin-bottom: 35px;
}

.settings-form h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--light-text-secondary);
}

.theme-dark .settings-form h3 {
    color: var(--dark-text-secondary);
}

.theme-selector {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 25px 0;
}

.theme-option {
    flex: 1;
    text-align: center;
    cursor: pointer;
}

.theme-option input[type="radio"] {
    display: none;
}

.theme-option span {
    display: block;
    padding: 15px 20px;
    border: 2px solid var(--light-border);
    border-radius: 16px;
    transition: all 0.3s;
    font-weight: 500;
}

.theme-dark .theme-option span {
    border-color: var(--dark-border);
}

.theme-option input[type="radio"]:checked + span {
    border-color: var(--light-primary);
    background: linear-gradient(135deg, var(--light-primary), var(--light-info));
    color: white;
    transform: scale(1.05);
}

.theme-dark .theme-option input[type="radio"]:checked + span {
    border-color: var(--dark-primary);
    background: linear-gradient(135deg, var(--dark-primary), var(--dark-info));
}

hr {
    margin: 35px 0;
    border: none;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--light-border), transparent);
}

.theme-dark hr {
    background: linear-gradient(to right, transparent, var(--dark-border), transparent);
}

/* ===== responsive ===== */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
        padding: 20px;
    }
    
    .header-title {
        flex-direction: column;
        gap: 10px;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .notes-list,
    .files-list {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    .modal .modal-content {
        width: 95%;
        padding: 25px;
    }
    
    .theme-selector {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .login-container {
        margin: 20px auto;
        padding: 25px;
    }
    
    .note-meta {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
    
    .file-item {
        flex-wrap: wrap;
    }
    
    .file-actions {
        width: 100%;
        justify-content: flex-end;
        opacity: 1;
    }
    
    .dashboard-section {
        padding: 20px;
    }
}
/* ===== copy button styles ===== */
.copy-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text-secondary);
}

.theme-dark .copy-btn {
    color: var(--dark-text-secondary);
}

.copy-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: scale(1.1);
    color: var(--light-primary);
}

.theme-dark .copy-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--dark-primary);
}

.copy-btn.copied {
    color: var(--light-success);
    animation: pop 0.3s ease;
}

.theme-dark .copy-btn.copied {
    color: var(--dark-success);
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.note-actions {
    display: flex;
    gap: 5px;
    align-items: center;
}

.note-actions .btn-icon,
.note-actions .copy-btn {
    width: 36px;
    height: 36px;
}

.copy-tooltip {
    position: relative;
}

.copy-tooltip:hover::after {
    content: 'کپی متن';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    margin-bottom: 5px;
    z-index: 1000;
}

.theme-dark .copy-tooltip:hover::after {
    background: rgba(255, 255, 255, 0.9);
    color: black;
}

.copy-tooltip.copied:hover::after {
    content: 'کپی شد!';
}