/* ============================================
   Wasle Mail — Design System
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Light Theme - Power & Elegance */
    --wasle-canvas: #fafbfc;
    --wasle-surface: #ffffff;
    --wasle-surface-raised: #ffffff;
    --wasle-surface-pressed: #f8fafc;
    --wasle-surface-alt: #f7f8fa;
    
    --wasle-text: #0a0e27;
    --wasle-text-secondary: #4a5568;
    --wasle-text-disabled: #718096;
    --wasle-text-inverse: #ffffff;
    --wasle-text-accent: #1a202c;
    
    /* Primary Brand - Powerful Orange */
    --wasle-primary: #ff6b35;
    --wasle-primary-hover: #e55a2b;
    --wasle-primary-active: #cc4a24;
    --wasle-primary-bg: rgba(255, 107, 53, 0.08);
    --wasle-primary-border: rgba(255, 107, 53, 0.15);
    --wasle-primary-gradient: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    
    /* Sophisticated Palette */
    --wasle-accent: #6366f1;
    --wasle-accent-hover: #5558e3;
    --wasle-success: #10b981;
    --wasle-success-bg: rgba(16, 185, 129, 0.08);
    --wasle-warning: #f59e0b;
    --wasle-warning-bg: rgba(245, 158, 11, 0.08);
    --wasle-danger: #ef4444;
    --wasle-danger-bg: rgba(239, 68, 68, 0.08);
    --wasle-info: #3b82f6;
    --wasle-info-bg: rgba(59, 130, 246, 0.08);
    
    /* Premium Gradients */
    --wasle-gradient-primary: linear-gradient(135deg, #ff6b35 0%, #f7931e 50%, #ff8c42 100%);
    --wasle-gradient-surface: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    --wasle-gradient-dark: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #2d3748 100%);
    --wasle-gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* Elegant Borders */
    --wasle-border: #e2e8f0;
    --wasle-border-strong: #cbd5e1;
    --wasle-divider: #f1f5f9;
    --wasle-outline: #cbd5e1;
    --wasle-border-subtle: rgba(0, 0, 0, 0.05);
    --wasle-border-focus: var(--wasle-primary);

    --wasle-text-disabled: #a19f9d;
    --wasle-text-hyperlink: #0078d4;

    /* Premium Shadows — Multi-layered depth */
    --wasle-shadow-sm: 0 1px 2px rgba(10, 14, 39, 0.04), 0 1px 4px rgba(10, 14, 39, 0.06);
    --wasle-shadow-md: 0 2px 4px rgba(10, 14, 39, 0.04), 0 4px 16px rgba(10, 14, 39, 0.08);
    --wasle-shadow-lg: 0 4px 8px rgba(10, 14, 39, 0.04), 0 8px 32px rgba(10, 14, 39, 0.10);
    --wasle-shadow-xl: 0 8px 16px rgba(10, 14, 39, 0.06), 0 24px 64px rgba(10, 14, 39, 0.14);
    --wasle-shadow-2xl: 0 16px 32px rgba(10, 14, 39, 0.08), 0 48px 96px rgba(10, 14, 39, 0.16);
    --wasle-shadow-hover: 0 4px 12px rgba(10, 14, 39, 0.06), 0 12px 40px rgba(10, 14, 39, 0.12);
    --wasle-shadow-press: 0 2px 4px rgba(10, 14, 39, 0.08), inset 0 1px 2px rgba(0, 0, 0, 0.06);
    --wasle-shadow-glow: 0 0 0 1px rgba(255, 107, 53, 0.2), 0 0 20px rgba(255, 107, 53, 0.15);
    --wasle-inner-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);

    /* Radii — Enterprise square edges */
    --wasle-radius-none: 0;
    --wasle-radius-sm: 2px;
    --wasle-radius-md: 3px;
    --wasle-radius-lg: 4px;
    --wasle-radius-xl: 6px;
    --wasle-radius-full: 9999px;

    /* Spacing (base 4px) */
    --wasle-space-1: 4px;
    --wasle-space-2: 8px;
    --wasle-space-3: 12px;
    --wasle-space-4: 16px;
    --wasle-space-5: 20px;
    --wasle-space-6: 24px;
    --wasle-space-8: 32px;

    /* Typography */
    --wasle-font-heading: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
    --wasle-font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --wasle-font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', ui-monospace, monospace;

    /* Transitions — Apple spring physics */
    --wasle-transition-fast: 200ms cubic-bezier(0.22, 1, 0.36, 1);
    --wasle-transition-normal: 350ms cubic-bezier(0.22, 1, 0.36, 1);
    --wasle-transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    --wasle-transition-slow: 600ms cubic-bezier(0.22, 1, 0.36, 1);

    /* Backdrop blur */
    --wasle-blur-sm: 8px;
    --wasle-blur-md: 20px;
    --wasle-blur-lg: 40px;

    /* Layout */
    --wasle-sidebar-width: 240px;
    --wasle-list-width: 360px;

    /* Semantic */
    --wasle-success: #107c10;
    --wasle-danger: #d13438;
    --wasle-warning: #ff8c00;
    --wasle-info: #0078d4;
    --wasle-attention: #ffaa44;

    /* Categories */
    --wasle-category-red: #e74856;
    --wasle-category-orange: #ff8c00;
    --wasle-category-yellow: #f9a825;
    --wasle-category-green: #107c10;
    --wasle-category-blue: #0078d4;
    --wasle-category-purple: #8764b8;
    --wasle-category-gray: #605e5c;

    /* Grid */
    --wasle-grid-columns: 12;
    --wasle-grid-gutter: 16px;

    /* Button sizing — Enterprise scale */
    --wasle-btn-height: 48px;
    --wasle-btn-height-sm: 40px;
    --wasle-btn-height-lg: 56px;
    --wasle-btn-font-size: 15px;
    --wasle-btn-padding-x: 24px;
    --wasle-btn-padding-y: 14px;

    /* Density: normal (default) — Bigger enterprise rows */
    --wasle-density-row-height: 64px;
    --wasle-density-font-size: 14px;
    --wasle-density-padding: 16px;
}

/* --- Dark Theme — Powerful & Sophisticated --- */
[data-theme="dark"] {
    --wasle-canvas: #0a0e27;
    --wasle-surface: #1a1f3a;
    --wasle-surface-raised: #232946;
    --wasle-surface-pressed: #2d3748;
    --wasle-surface-alt: #1e2139;
    --wasle-sidebar: #16162a;
    
    --wasle-text: #f7fafc;
    --wasle-text-secondary: #a0aec0;
    --wasle-text-disabled: #718096;
    --wasle-text-inverse: #0a0e27;
    --wasle-text-accent: #e2e8f0;
    
    /* Primary Brand - Vibrant in Dark */
    --wasle-primary: #ff8c42;
    --wasle-primary-hover: #ff9d5c;
    --wasle-primary-active: #e67e3a;
    --wasle-primary-bg: rgba(255, 140, 66, 0.1);
    --wasle-primary-border: rgba(255, 140, 66, 0.2);
    --wasle-primary-gradient: linear-gradient(135deg, #ff8c42 0%, #ffa94d 100%);
    
    /* Sophisticated Dark Palette */
    --wasle-accent: #818cf8;
    --wasle-accent-hover: #9ca3f5;
    --wasle-success: #34d399;
    --wasle-success-bg: rgba(52, 211, 153, 0.1);
    --wasle-warning: #fbbf24;
    --wasle-warning-bg: rgba(251, 191, 36, 0.1);
    --wasle-danger: #f87171;
    --wasle-danger-bg: rgba(248, 113, 113, 0.1);
    --wasle-info: #60a5fa;
    --wasle-info-bg: rgba(96, 165, 250, 0.1);
    
    /* Premium Dark Gradients */
    --wasle-gradient-primary: linear-gradient(135deg, #ff8c42 0%, #ffa94d 50%, #ffb366 100%);
    --wasle-gradient-surface: linear-gradient(145deg, #1a1f3a 0%, #232946 100%);
    --wasle-gradient-dark: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #2d3748 100%);
    --wasle-gradient-accent: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    
    /* Elegant Dark Borders */
    --wasle-border: #2d3748;
    --wasle-border-strong: #4a5568;
    --wasle-divider: #1a1f3a;
    --wasle-outline: #4a5568;
    --wasle-border-subtle: rgba(255, 255, 255, 0.05);
    --wasle-border-focus: var(--wasle-primary);
    
    /* Premium Dark Shadows */
    --wasle-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2), 0 1px 6px rgba(0, 0, 0, 0.3);
    --wasle-shadow-md: 0 2px 4px rgba(0, 0, 0, 0.2), 0 6px 20px rgba(0, 0, 0, 0.35);
    --wasle-shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.25), 0 12px 40px rgba(0, 0, 0, 0.4);
    --wasle-shadow-xl: 0 8px 16px rgba(0, 0, 0, 0.25), 0 24px 64px rgba(0, 0, 0, 0.45);
    --wasle-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.25), 0 16px 48px rgba(0, 0, 0, 0.4);
    --wasle-shadow-glow: 0 0 0 1px rgba(255, 140, 66, 0.3), 0 0 20px rgba(255, 140, 66, 0.2);
}

/* --- Density: Compact --- */
[data-density="compact"] {
    --wasle-density-row-height: 48px;
    --wasle-density-font-size: 13px;
    --wasle-density-padding: 12px;
}

/* --- Density: Comfortable --- */
[data-density="comfortable"] {
    --wasle-density-row-height: 72px;
    --wasle-density-font-size: 15px;
    --wasle-density-padding: 18px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-20px, -20px) rotate(1deg); }
    66% { transform: translate(20px, -10px) rotate(-1deg); }
}

/* ============================================
   Base Reset & Typography
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--wasle-font-body);
    font-size: var(--wasle-density-font-size);
    color: var(--wasle-text);
    background: var(--wasle-canvas);
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

h1, h2, h3 {
    font-family: var(--wasle-font-heading);
    font-weight: 700;
    line-height: 1.25;
}
h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }

code, pre {
    font-family: var(--wasle-font-mono);
    font-size: 12px;
}

a {
    color: var(--wasle-primary);
    text-decoration: none;
}
a:hover {
    color: var(--wasle-primary-hover);
}

/* Loading spinner animation */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   Layout: 3-Column Mail Shell
   ============================================ */
.wasle-shell {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.wasle-sidebar {
    width: var(--wasle-sidebar-width);
    min-width: var(--wasle-sidebar-width);
    background: rgba(248, 249, 250, 0.85);
    backdrop-filter: saturate(180%) blur(var(--wasle-blur-md));
    -webkit-backdrop-filter: saturate(180%) blur(var(--wasle-blur-md));
    border-right: 1px solid var(--wasle-divider);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: width var(--wasle-transition-slow), min-width var(--wasle-transition-slow), background var(--wasle-transition-normal);
}
[data-theme="dark"] .wasle-sidebar {
    background: rgba(22, 22, 42, 0.8);
}

.wasle-list-pane {
    width: var(--wasle-list-width);
    min-width: var(--wasle-list-width);
    background: var(--wasle-surface);
    border-right: 1px solid var(--wasle-divider);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.wasle-reading-pane {
    flex: 1;
    background: var(--wasle-surface);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* Responsive: 2-column on medium screens */
@media (max-width: 1024px) {
    .wasle-sidebar { width: 56px; min-width: 56px; }
    .wasle-sidebar .nav-label { display: none; }
}

/* Responsive: 1-column on small screens */
@media (max-width: 768px) {
    .wasle-sidebar { display: none; }
    .wasle-list-pane { width: 100%; min-width: 100%; }
    .wasle-reading-pane { display: none; }
    .wasle-shell.reading-active .wasle-list-pane { display: none; }
    .wasle-shell.reading-active .wasle-reading-pane { display: flex; }
}

/* ============================================
   Sidebar
   ============================================ */
.wasle-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: var(--wasle-space-4) var(--wasle-space-4);
    font-family: var(--wasle-font-heading);
    font-weight: 600;
    font-size: 18px;
    color: var(--wasle-text);
}

.wasle-logo .logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.wasle-logo img {
    width: 28px;
    height: 28px;
    border-radius: var(--wasle-radius-sm);
}

.wasle-compose-btn {
    margin: var(--wasle-space-2) var(--wasle-space-3);
    padding: var(--wasle-btn-padding-y) var(--wasle-btn-padding-x);
    height: var(--wasle-btn-height);
    background: var(--wasle-primary);
    color: #fff;
    border: none;
    border-radius: var(--wasle-radius-sm);
    font-family: var(--wasle-font-body);
    font-size: var(--wasle-btn-font-size);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--wasle-space-2);
    transition: all var(--wasle-transition-fast);
}
.wasle-compose-btn:hover {
    background: var(--wasle-primary-hover);
    box-shadow: var(--wasle-shadow-md);
    transform: translateY(-2px);
}
.wasle-compose-btn:active {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--wasle-shadow-sm);
}

.wasle-nav-item {
    display: flex;
    align-items: center;
    gap: var(--wasle-space-3);
    padding: var(--wasle-space-3) var(--wasle-space-4);
    color: var(--wasle-text-secondary);
    font-size: var(--wasle-density-font-size);
    font-weight: 400;
    border-radius: var(--wasle-radius-sm);
    margin: 1px var(--wasle-space-2);
    cursor: pointer;
    transition: all var(--wasle-transition-fast);
}
.wasle-nav-item:hover {
    background: var(--wasle-primary-light);
    color: var(--wasle-text);
    transform: translateX(2px);
}
.wasle-nav-item:active {
    transform: scale(0.97) translateX(2px);
}
.wasle-nav-item.active {
    background: var(--wasle-primary-light);
    color: var(--wasle-primary);
    font-weight: 600;
    border-left: 3px solid var(--wasle-primary);
}

.wasle-nav-badge {
    margin-left: auto;
    background: var(--wasle-primary);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--wasle-radius-sm);
    min-width: 20px;
    text-align: center;
}

/* ============================================
   Message List
   ============================================ */
.wasle-msg-row {
    display: flex;
    align-items: center;
    gap: var(--wasle-space-3);
    padding: var(--wasle-density-padding) var(--wasle-space-4);
    min-height: var(--wasle-density-row-height);
    border-bottom: 1px solid var(--wasle-divider);
    cursor: pointer;
    transition: background var(--wasle-transition-fast);
}
.wasle-msg-row:hover {
    background: var(--wasle-primary-light);
    box-shadow: var(--wasle-shadow-sm);
    transform: translateX(2px);
}
.wasle-msg-row:active {
    transform: scale(0.995);
}
.wasle-msg-row.active {
    background: var(--wasle-primary-light);
    border-left: 3px solid var(--wasle-primary);
    box-shadow: inset 3px 0 0 var(--wasle-primary), var(--wasle-shadow-sm);
}
.wasle-msg-row.unread .msg-sender {
    font-weight: 700;
    color: var(--wasle-text);
}

.msg-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--wasle-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    flex-shrink: 0;
}

.msg-content {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.msg-sender {
    font-size: 13px;
    font-weight: 500;
    color: var(--wasle-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.msg-subject {
    font-size: 13px;
    color: var(--wasle-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.msg-preview {
    font-size: 12px;
    color: var(--wasle-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.msg-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    flex-shrink: 0;
}

.msg-date {
    font-size: 11px;
    color: var(--wasle-text-secondary);
    white-space: nowrap;
}

/* Priority badges */
.priority-badge {
    font-size: 10px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: var(--wasle-radius-sm);
}
.priority-badge.high { background: rgba(209, 52, 56, 0.1); color: var(--wasle-danger); }
.priority-badge.normal { background: rgba(0, 120, 212, 0.1); color: var(--wasle-info); }
.priority-badge.low { background: rgba(96, 94, 92, 0.1); color: var(--wasle-text-secondary); }

/* ============================================
   Reading Pane
   ============================================ */
.wasle-reading-header {
    padding: var(--wasle-space-6);
    border-bottom: 1px solid var(--wasle-divider);
}

.wasle-reading-subject {
    font-family: var(--wasle-font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--wasle-text);
    margin-bottom: var(--wasle-space-3);
}

.wasle-reading-body {
    padding: var(--wasle-space-6);
    font-size: 14px;
    line-height: 1.7;
    color: var(--wasle-text);
}

/* ============================================
   Toolbar
   ============================================ */
.wasle-toolbar {
    display: flex;
    align-items: center;
    gap: var(--wasle-space-1);
    padding: var(--wasle-space-2) var(--wasle-space-3);
    border-bottom: 1px solid var(--wasle-divider);
    background: var(--wasle-surface);
}

.wasle-toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--wasle-space-2);
    padding: var(--wasle-space-1) var(--wasle-space-3);
    font-size: 12px;
    font-weight: 400;
    color: var(--wasle-text-secondary);
    background: none;
    border: 1px solid transparent;
    border-radius: var(--wasle-radius-sm);
    cursor: pointer;
    transition: all var(--wasle-transition-fast);
}
.wasle-toolbar-btn:hover {
    background: var(--wasle-surface-raised);
    border-color: var(--wasle-border);
    color: var(--wasle-text);
    transform: translateY(-1px);
}
.wasle-toolbar-btn:active {
    background: var(--wasle-primary-light);
    border-color: var(--wasle-primary);
    transform: scale(0.95);
}
.wasle-toolbar-btn.danger:hover {
    background: rgba(209, 52, 56, 0.08);
    color: var(--wasle-danger);
    border-color: rgba(209, 52, 56, 0.3);
}

/* ============================================
   Search Bar
   ============================================ */
.wasle-search {
    position: relative;
    margin: var(--wasle-space-2) var(--wasle-space-3);
}

.wasle-search input {
    width: 100%;
    padding: var(--wasle-space-2) var(--wasle-space-3) var(--wasle-space-2) 36px;
    font-family: var(--wasle-font-body);
    font-size: 13px;
    color: var(--wasle-text);
    background: var(--wasle-surface);
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    outline: none;
    transition: all var(--wasle-transition-fast);
}
.wasle-search input:focus {
    border-color: var(--wasle-border-focus);
    box-shadow: 0 0 0 3px var(--wasle-primary-ring);
    background: var(--wasle-surface);
}
.wasle-search input::placeholder {
    color: var(--wasle-text-disabled);
}

/* ============================================
   Apple-Style Animations & Keyframes
   ============================================ */

/* --- Core keyframes --- */
@keyframes wasle-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes wasle-fade-out {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(8px); }
}

@keyframes wasle-slide-in-right {
    from { opacity: 0; transform: translateX(24px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes wasle-slide-out-right {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(24px); }
}

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

@keyframes wasle-slide-down {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --- Modal / overlay --- */
@keyframes wasle-modal-in {
    from { opacity: 0; transform: scale(0.92) translateY(12px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes wasle-modal-out {
    from { opacity: 1; transform: scale(1) translateY(0); }
    to   { opacity: 0; transform: scale(0.95) translateY(8px); }
}

@keyframes wasle-overlay-in {
    from { opacity: 0; backdrop-filter: blur(0); }
    to   { opacity: 1; backdrop-filter: saturate(180%) blur(var(--wasle-blur-md)); }
}

/* --- Spring / bounce --- */
@keyframes wasle-scale-in {
    0%   { opacity: 0; transform: scale(0.85); }
    60%  { transform: scale(1.02); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes wasle-bounce-in {
    0%   { opacity: 0; transform: scale(0.6); }
    50%  { transform: scale(1.08); }
    70%  { transform: scale(0.96); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes wasle-check-pop {
    0%   { transform: scale(0); }
    50%  { transform: scale(1.25); }
    75%  { transform: scale(0.9); }
    100% { transform: scale(1); }
}

/* --- Utility --- */
@keyframes wasle-pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

@keyframes wasle-glow-pulse {
    0%, 100% { box-shadow: 0 0 0 0 var(--wasle-primary-ring); }
    50%      { box-shadow: 0 0 0 6px transparent; }
}

@keyframes wasle-shake {
    0%, 100% { transform: translateX(0); }
    15%      { transform: translateX(-6px); }
    30%      { transform: translateX(5px); }
    45%      { transform: translateX(-4px); }
    60%      { transform: translateX(3px); }
    75%      { transform: translateX(-2px); }
}

@keyframes wasle-blur-in {
    from { opacity: 0; filter: blur(8px); }
    to   { opacity: 1; filter: blur(0); }
}

@keyframes wasle-float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

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

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

@keyframes wasle-skeleton {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* --- Utility classes --- */
.animate-fade-in     { animation: wasle-fade-in 350ms cubic-bezier(0.22, 1, 0.36, 1) both; }
.animate-fade-out    { animation: wasle-fade-out 250ms cubic-bezier(0.22, 1, 0.36, 1) both; }
.animate-slide-in    { animation: wasle-slide-in-right 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-slide-up    { animation: wasle-slide-up 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-scale-in    { animation: wasle-scale-in 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-bounce-in   { animation: wasle-bounce-in 500ms cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-check       { animation: wasle-check-pop 400ms cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-blur-in     { animation: wasle-blur-in 400ms cubic-bezier(0.22, 1, 0.36, 1) both; }
.animate-shake       { animation: wasle-shake 500ms cubic-bezier(0.22, 1, 0.36, 1); }
.animate-float       { animation: wasle-float 3s ease-in-out infinite; }

/* ============================================
   Scrollbar — macOS thin style
   ============================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.15);
    border-radius: var(--wasle-radius-full);
    border: 2px solid transparent;
    background-clip: content-box;
    transition: background 0.2s;
}
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.3); background-clip: content-box; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); background-clip: content-box; }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.3); background-clip: content-box; }

/* ============================================
   Keyboard Shortcut Overlay
   ============================================ */
.wasle-kbd-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.wasle-kbd-panel {
    background: var(--wasle-surface);
    border-radius: var(--wasle-radius-sm);
    box-shadow: var(--wasle-shadow-xl);
    padding: var(--wasle-space-6);
    max-width: 480px;
    width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--wasle-border);
}

.wasle-kbd-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--wasle-space-2) 0;
    border-bottom: 1px solid var(--wasle-divider);
}

kbd {
    display: inline-block;
    padding: 2px 8px;
    font-family: var(--wasle-font-mono);
    font-size: 12px;
    font-weight: 600;
    background: var(--wasle-surface-raised);
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    box-shadow: 0 1px 0 var(--wasle-border);
}

/* ============================================
   Enterprise Components
   ============================================ */

/* Grid System */
.wasle-grid {
    display: grid;
    grid-template-columns: repeat(var(--wasle-grid-columns), 1fr);
    gap: var(--wasle-grid-gutter);
}

.wasle-col-span-1 { grid-column: span 1; }
.wasle-col-span-2 { grid-column: span 2; }
.wasle-col-span-3 { grid-column: span 3; }
.wasle-col-span-4 { grid-column: span 4; }
.wasle-col-span-6 { grid-column: span 6; }
.wasle-col-span-8 { grid-column: span 8; }
.wasle-col-span-12 { grid-column: span 12; }

/* Card Component */
.wasle-card {
    background: var(--wasle-surface);
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    box-shadow: var(--wasle-shadow-sm);
    overflow: hidden;
}

.wasle-card-header {
    padding: var(--wasle-space-4) var(--wasle-space-5);
    background: var(--wasle-surface-raised);
    border-bottom: 1px solid var(--wasle-border);
    font-weight: 600;
    font-size: 14px;
}

.wasle-card-body {
    padding: var(--wasle-space-5);
}

/* Button Variants */
.wasle-btn {
    padding: var(--wasle-space-2) var(--wasle-space-4);
    font-size: 13px;
    font-weight: 400;
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    cursor: pointer;
    transition: all var(--wasle-transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--wasle-space-2);
}

.wasle-btn-primary {
    background: var(--wasle-primary);
    color: #fff;
    border-color: var(--wasle-primary);
}
.wasle-btn-primary:hover {
    background: var(--wasle-primary-hover);
    border-color: var(--wasle-primary-hover);
    box-shadow: 0 2px 8px rgba(234, 88, 12, 0.3);
    transform: translateY(-1px);
}
.wasle-btn-primary:active {
    transform: scale(0.97);
    box-shadow: none;
}

.wasle-btn-secondary {
    background: var(--wasle-surface);
    color: var(--wasle-text);
}
.wasle-btn-secondary:hover {
    background: var(--wasle-surface-raised);
    border-color: var(--wasle-border-focus);
    transform: translateY(-1px);
}
.wasle-btn-secondary:active {
    transform: scale(0.97);
}

.wasle-btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--wasle-text-secondary);
}
.wasle-btn-ghost:hover {
    background: var(--wasle-primary-light);
    color: var(--wasle-primary);
    transform: translateY(-1px);
}
.wasle-btn-ghost:active {
    transform: scale(0.96);
}

/* Form Controls */
.wasle-input {
    padding: var(--wasle-space-2) var(--wasle-space-3);
    font-size: 13px;
    font-family: var(--wasle-font-body);
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    background: var(--wasle-surface);
    color: var(--wasle-text);
    outline: none;
    transition: all var(--wasle-transition-fast);
}

.wasle-input:focus {
    border-color: var(--wasle-border-focus);
    box-shadow: 0 0 0 3px var(--wasle-primary-ring);
}

.wasle-input:disabled {
    background: var(--wasle-surface-raised);
    color: var(--wasle-text-disabled);
    cursor: not-allowed;
}

.wasle-select {
    padding: var(--wasle-space-2) var(--wasle-space-3);
    font-size: 13px;
    font-family: var(--wasle-font-body);
    border: 1px solid var(--wasle-border);
    border-radius: var(--wasle-radius-sm);
    background: var(--wasle-surface);
    color: var(--wasle-text);
    cursor: pointer;
    outline: none;
    transition: all var(--wasle-transition-fast);
}

.wasle-select:focus {
    border-color: var(--wasle-border-focus);
    box-shadow: 0 0 0 3px var(--wasle-primary-ring);
}

.wasle-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Tables */
.wasle-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.wasle-table th {
    text-align: left;
    padding: var(--wasle-space-3);
    background: var(--wasle-surface-raised);
    border-bottom: 1px solid var(--wasle-border);
    font-weight: 600;
    color: var(--wasle-text);
}

.wasle-table td {
    padding: var(--wasle-space-3);
    border-bottom: 1px solid var(--wasle-divider);
}

.wasle-table tr {
    transition: background var(--wasle-transition-fast), transform var(--wasle-transition-fast);
}
.wasle-table tr:hover {
    background: var(--wasle-primary-light);
}

.wasle-table tr.selected {
    background: var(--wasle-primary-light);
    border-left: 3px solid var(--wasle-primary);
}

/* Status Indicators */
.wasle-status {
    display: inline-flex;
    align-items: center;
    gap: var(--wasle-space-1);
    font-size: 12px;
    font-weight: 500;
}

.wasle-status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: var(--wasle-radius-sm);
}

.wasle-status.online::before {
    background: var(--wasle-success);
}

.wasle-status.offline::before {
    background: var(--wasle-text-disabled);
}

.wasle-status.busy::before {
    background: var(--wasle-warning);
}

/* Loading States */
.wasle-skeleton {
    background: linear-gradient(90deg, var(--wasle-surface-raised) 25%, var(--wasle-surface) 50%, var(--wasle-surface-raised) 75%);
    background-size: 200% 100%;
    animation: wasle-skeleton 1.5s infinite;
    border-radius: var(--wasle-radius-sm);
}

@keyframes wasle-skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.wasle-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--wasle-border);
    border-top-color: var(--wasle-primary);
    border-radius: 50%;
    animation: wasle-spin 0.8s linear infinite;
}

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

/* ============================================
   Phase D: Enterprise Animation System
   Apple-level tactile feedback & spring physics
   ============================================ */

/* Button press effect — tactile feedback */
.wasle-btn-press {
    transition: all var(--wasle-transition-fast);
}
.wasle-btn-press:hover {
    transform: translateY(-2px);
    box-shadow: var(--wasle-shadow-hover);
}
.wasle-btn-press:active {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--wasle-shadow-sm);
}

/* Card hover lift */
.wasle-card-lift {
    transition: all var(--wasle-transition-normal);
}
.wasle-card-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--wasle-shadow-xl);
}

/* Icon size for enterprise scale */
.hgi-stroke {
    font-size: 20px;
    width: 20px;
    height: 20px;
}

/* Larger icons for buttons */
.wasle-compose-btn .hgi-stroke,
.wasle-btn-lg .hgi-stroke {
    font-size: 22px;
    width: 22px;
    height: 22px;
}

/* Focus ring animation */
.wasle-focus-ring:focus-visible {
    outline: 2px solid var(--wasle-primary);
    outline-offset: 2px;
    animation: wasle-focus-pulse 0.3s ease-out;
}

@keyframes wasle-focus-pulse {
    0% { outline-offset: 0; }
    100% { outline-offset: 2px; }
}