/* Global Design Tokens & Variables */
:root {
    /* Color Palette - Modern Clean HSL Colors */
    --primary-h: 215;
    --primary-s: 85%;
    --primary-l: 50%;
    --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
    --primary-hover: hsl(var(--primary-h), var(--primary-s), calc(var(--primary-l) - 8%));
    --primary-light: hsl(var(--primary-h), var(--primary-s), 95%);
    --primary-glow: hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.15);

    --success: #10b981;
    --success-light: #ecfdf5;
    --success-glow: rgba(16, 185, 129, 0.15);
    
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --warning-glow: rgba(245, 158, 11, 0.15);
    
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --danger-glow: rgba(239, 68, 68, 0.15);
    
    --info: #06b6d4;
    --info-light: #ecfeff;
    --info-glow: rgba(6, 182, 212, 0.15);

    /* Light Theme Defaults */
    --bg-app: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-nested: #f1f5f9;
    --border-color: #e2e8f0;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.05);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-family: 'IBM Plex Sans Thai', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark Theme Variables override */
[data-theme="dark"] {
    --bg-app: #0b0f19;
    --bg-surface: #131c2e;
    --bg-surface-nested: #1e293b;
    --border-color: #2e3b52;
    
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    
    --primary-light: hsl(var(--primary-h), var(--primary-s), 12%);
    --success-light: rgba(16, 185, 129, 0.1);
    --warning-light: rgba(245, 158, 11, 0.1);
    --danger-light: rgba(239, 68, 68, 0.1);
    --info-light: rgba(6, 182, 212, 0.1);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: transform var(--transition-fast), background-color var(--transition-normal), border-color var(--transition-normal);
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
}

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

[data-theme="dark"] .sun-icon {
    display: block;
}
[data-theme="dark"] .moon-icon {
    display: none;
}
[data-theme="light"] .sun-icon {
    display: none;
}
[data-theme="light"] .moon-icon {
    display: block;
}

/* Button & UI Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
    font-weight: 500;
    font-size: 14px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-white);
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    color: var(--text-white);
    box-shadow: var(--primary-glow);
}

.btn-secondary {
    background-color: var(--bg-surface-nested);
    color: var(--text-main);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--danger);
    color: var(--text-white);
}
.btn-danger:hover {
    background-color: #dc2626;
    box-shadow: var(--danger-glow);
}

.btn-success {
    background-color: var(--success);
    color: var(--text-white);
}
.btn-success:hover {
    background-color: #059669;
    box-shadow: var(--success-glow);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: var(--radius-sm);
}

/* Form Controls */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-family);
    font-size: 14px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

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

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* Badge System */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
}

/* Priority Badges */
.badge-priority-low {
    background-color: var(--bg-surface-nested);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}
.badge-priority-medium {
    background-color: var(--info-light);
    color: var(--info);
}
.badge-priority-high {
    background-color: var(--warning-light);
    color: var(--warning);
}
.badge-priority-urgent {
    background-color: var(--danger-light);
    color: var(--danger);
    animation: pulse 2s infinite;
}

/* Status Badges */
.badge-status-pending {
    background-color: var(--warning-light);
    color: var(--warning);
}
.badge-status-progress {
    background-color: var(--info-light);
    color: var(--info);
}
.badge-status-completed {
    background-color: var(--success-light);
    color: var(--success);
}
.badge-status-cancelled {
    background-color: var(--danger-light);
    color: var(--danger);
}

/* Source Badges */
.badge-source-email {
    background-color: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}
.badge-source-teams {
    background-color: #f5f3ff;
    color: #5b21b6;
    border: 1px solid #ddd6fe;
}
.badge-source-line {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}
.badge-source-phone {
    background-color: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}
.badge-source-other {
    background-color: var(--bg-surface-nested);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.03); opacity: 0.85; }
    100% { transform: scale(1); opacity: 1; }
}

/* Alert Boxes */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid transparent;
}

.alert-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.15);
}

.alert-danger svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert-success {
    background-color: var(--success-light);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.15);
}

.alert-success svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}