/* ========== GlowHaven TradeZone - Premium Glass UI (Responsive) ========== */
/* Last Updated: 2026-04-26 | Version: 2.0 */

/* ================== CSS VARIABLES ================== */
:root {
    /* Color Palette */
    --primary: #22c55e;
    --primary-hover: #16a34a;
    --primary-light: #86efac;
    --primary-dark: #15803d;
    
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fca5a5;
    --danger-dark: #b91c1c;
    
    --success: #34d399;
    --warning: #fbbf24;
    --info: #60a5fa;
    
    /* Backgrounds */
    --bg-primary: #0f172a;
    --bg-secondary: #020617;
    --bg-gradient: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    --bg-overlay: rgba(0, 0, 0, 0.6);
    
    /* Text Colors */
    --text: #ffffff;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-hover: rgba(255, 255, 255, 0.2);
    
    /* Typography */
    --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Layout */
    --sidebar-width: 240px;
    --bottom-nav-height: 65px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --content-max-width: 1400px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --duration-fast: 0.15s;
    --duration-normal: 0.25s;
    --duration-slow: 0.35s;
    --easing-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --easing-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 4px 12px rgba(34, 197, 94, 0.1);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

/* Dark mode alternative (future-proofing) */
@media (prefers-color-scheme: dark) {
    :root {
        --text-secondary: #a0aec0;
    }
}

/* ================== RESET & BASE STYLES ================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg-gradient);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-tap-highlight-color: transparent;
    overflow-x: hidden;
}

/* Smooth transitions for reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================== SCROLLBAR STYLES ================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    transition: background var(--duration-fast) ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) rgba(0, 0, 0, 0.2);
}

/* ================== GLASS MORPHISM COMPONENT ================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: 
        transform var(--duration-normal) var(--easing-smooth),
        border-color var(--duration-normal) ease,
        background var(--duration-normal) ease;
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
}

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

.hover-lift:active {
    transform: translateY(-2px);
}

/* ================== BUTTON COMPONENT ================== */
.btn {
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: white;
    transition: all var(--duration-normal) var(--easing-smooth);
    position: relative;
    overflow: hidden;
    user-select: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: scale(0.96);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-buy {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    box-shadow: var(--shadow-glow);
}

.btn-buy:hover {
    box-shadow: 0 4px 20px rgba(34, 197, 94, 0.3);
}

.btn-sell {
    background: linear-gradient(135deg, var(--danger), var(--danger-hover));
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.1);
}

.btn-sell:hover {
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

/* ================== TEXT & TYPOGRAPHY ================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 28px; }
h2 { font-size: 24px; }
h3 { font-size: 20px; }
h4 { font-size: 18px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Price Colors */
.price-up {
    color: var(--primary-light);
    font-weight: 700;
}

.price-down {
    color: var(--danger-light);
    font-weight: 700;
}

.price-neutral {
    color: var(--text-secondary);
}

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

.text-tertiary {
    color: var(--text-tertiary);
}

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

.text-danger {
    color: var(--danger);
}

.text-mono {
    font-family: var(--font-mono);
    font-size: 14px;
}

/* ================== ALERT COMPONENT ================== */
.alert {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    animation: slideDown var(--duration-slow) var(--easing-smooth);
}

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

.alert-icon {
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-content {
    flex: 1;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--primary-light);
}

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

.alert-warning {
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fde047;
}

.alert-info {
    background: rgba(96, 165, 250, 0.1);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: #93c5fd;
}

/* ================== LAYOUT - SIDEBAR ================== */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border-right: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar-header {
    margin-bottom: var(--spacing-xl);
}

.sidebar .logo {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: block;
    letter-spacing: -0.5px;
    transition: color var(--duration-normal) ease;
}

.sidebar .logo:hover {
    color: var(--primary-hover);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
}

.sidebar a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--duration-normal) ease;
    position: relative;
}

.sidebar a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
    transition: height var(--duration-normal) var(--easing-smooth);
}

.sidebar a:hover {
    background: rgba(34, 197, 94, 0.1);
    color: var(--primary);
    padding-left: 20px;
}

.sidebar a.active {
    background: rgba(34, 197, 94, 0.15);
    color: var(--primary);
    padding-left: 20px;
}

.sidebar a.active::before {
    height: 24px;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
}

/* ================== LAYOUT - MAIN CONTENT ================== */
.main {
    margin-left: var(--sidebar-width);
    padding: var(--spacing-lg);
    min-height: 100vh;
    max-width: calc(100% - var(--sidebar-width));
}

.main-content {
    max-width: var(--content-max-width);
}

/* ================== TOPBAR ================== */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-md);
}

.topbar-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.greeting {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

.greeting strong {
    color: var(--text);
    font-weight: 700;
}

.balance-box {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 16px;
    color: var(--primary);
    box-shadow: var(--shadow-glow);
    transition: all var(--duration-normal) ease;
}

.balance-box:hover {
    background: rgba(34, 197, 94, 0.25);
    transform: translateY(-2px);
}

/* ================== INDICES BAR ================== */
.indices-bar {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding: var(--spacing-md) 0 var(--spacing-lg);
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
}

.indices-bar::-webkit-scrollbar {
    height: 4px;
}

.index-card {
    flex: 0 0 auto;
    width: 180px;
    padding: var(--spacing-lg);
    text-align: center;
    scroll-snap-align: start;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: all var(--duration-normal) var(--easing-smooth);
    cursor: pointer;
}

.index-card:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-4px);
    border-color: var(--glass-border-hover);
}

.index-name {
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.index-value {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    font-variant-numeric: tabular-nums;
}

.index-change {
    font-size: 14px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* ================== CATEGORY TABS ================== */
.category-tabs {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-lg);
    scroll-behavior: smooth;
}

.category-tabs::-webkit-scrollbar {
    height: 4px;
    display: none;
}

.cat-tab {
    flex: 0 0 auto;
    padding: 10px 24px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--duration-normal) var(--easing-smooth);
    white-space: nowrap;
}

.cat-tab:hover {
    background: var(--glass-bg-hover);
    color: var(--text);
    border-color: var(--glass-border-hover);
}

.cat-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #000;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
}

/* ================== STOCK GRID & CARD ================== */
.stock-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    animation: fadeIn var(--duration-slow) var(--easing-smooth);
}

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

.stock-card {
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--easing-smooth);
}

.stock-card:hover {
    transform: translateY(-4px);
}

.stock-info {
    flex: 1;
}

.stock-info h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
}

.stock-info h4 span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.sector {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.stock-price {
    font-size: 18px;
    font-weight: 700;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.stock-change {
    font-size: 13px;
    font-weight: 600;
    text-align: right;
    margin-top: var(--spacing-xs);
}

/* ================== FORM COMPONENTS ================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 14px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    transition: all var(--duration-normal) ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.4);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-error {
    color: var(--danger);
    font-size: 12px;
    margin-top: 4px;
}

/* ================== MODAL ================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--easing-smooth);
    padding: var(--spacing-md);
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.trade-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--easing-smooth);
    padding: var(--spacing-md);
}

.trade-modal.active {
    display: flex;
    opacity: 1;
}

.modal-content,
.trade-modal-content {
    background: var(--bg-gradient);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: all var(--duration-normal) var(--easing-smooth);
}

.trade-modal.active .trade-modal-content,
.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--duration-normal) ease;
}

.modal-close:hover {
    background: var(--glass-bg);
    color: var(--text);
}

.modal-body {
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
}

/* Mobile Slide-Up Drawer */
@media (max-width: 768px) {
    .trade-modal,
    .modal-overlay {
        align-items: flex-end;
    }

    .modal-content,
    .trade-modal-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
        padding-bottom: calc(var(--spacing-lg) + var(--safe-bottom));
        transform: translateY(100%);
    }

    .trade-modal.active .trade-modal-content,
    .modal-overlay.active .modal-content {
        transform: translateY(0);
    }
}

/* ================== MOBILE RESPONSIVE ================== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }

    .sidebar {
        display: none;
    }

    .main {
        margin-left: 0;
        padding: var(--spacing-md);
        padding-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + var(--spacing-lg));
    }

    .topbar {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
        margin-bottom: var(--spacing-md);
    }

    .topbar-left {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .greeting {
        font-size: 14px;
    }

    .balance-box {
        width: auto;
        text-align: center;
        padding: 10px 20px;
        font-size: 14px;
    }

    /* Stock Grid */
    .stock-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }

    .stock-card {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
        padding: 14px;
    }

    .stock-price {
        font-size: 18px;
        width: 100%;
        text-align: left;
    }

    .stock-change {
        width: 100%;
        text-align: left;
    }

    /* Index Cards */
    .index-card {
        width: 150px;
        padding: 14px;
        font-size: 14px;
    }

    .index-value {
        font-size: 20px;
    }

    /* Category Tabs */
    .category-tabs {
        padding-bottom: var(--spacing-md);
    }

    .cat-tab {
        padding: 8px 16px;
        font-size: 12px;
    }

    /* Bottom Navigation */
    .bottom-nav {
        display: block;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 1px solid var(--glass-border);
        z-index: 150;
        padding-bottom: var(--safe-bottom);
    }

    .bottom-nav-inner {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: var(--bottom-nav-height);
    }

    .bottom-nav a {
        text-decoration: none;
        color: var(--text-secondary);
        font-size: 11px;
        font-weight: 600;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
        flex: 1;
        transition: color var(--duration-normal) ease;
        text-align: center;
    }

    .bottom-nav a:active {
        transform: scale(0.95);
    }

    .bottom-nav a.active {
        color: var(--primary);
    }

    .bottom-nav-icon {
        font-size: 20px;
        display: block;
    }

    .bottom-nav-label {
        display: block;
    }
}

/* ================== TABLET RESPONSIVE ================== */
@media (max-width: 1024px) and (min-width: 769px) {
    :root {
        --sidebar-width: 200px;
    }

    .sidebar {
        width: var(--sidebar-width);
        padding: var(--spacing-md);
    }

    .stock-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .main {
        padding: var(--spacing-md);
    }
}

/* ================== UTILITY CLASSES ================== */
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.px-xs { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.py-xs { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { justify-content: center; align-items: center; }
.flex-between { justify-content: space-between; }
.flex-gap-sm { gap: var(--spacing-sm); }
.flex-gap-md { gap: var(--spacing-md); }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.hidden { display: none; }
.invisible { visibility: hidden; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.overflow-hidden { overflow: hidden; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* ================== LOADING STATE ================== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.skeleton {
    background: linear-gradient(90deg, var(--glass-bg), var(--glass-bg-hover), var(--glass-bg));
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* ================== ACCESSIBILITY ================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: more) {
    .glass-card {
        border-width: 2px;
    }
    
    .btn {
        border: 2px solid transparent;
    }
}

/* Focus Visible for Better Accessibility */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}