/* ==========================================================================
   ACERO SHOP V1 - Main Stylesheet
   Professional, modern, clean, mobile-first design
   Compatible: 320px - 1920px
   Version: 1.0.0
   ========================================================================== */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Primary Palette */
    --color-primary: #EE4D2D;
    --color-primary-dark: #D03D1F;
    --color-primary-light: #FF6B4A;
    --color-primary-bg: #FFF0ED;

    /* Secondary Palette */
    --color-secondary: #0055AA;
    --color-secondary-dark: #003D7A;
    --color-secondary-light: #0077DD;
    --color-secondary-bg: #E8F4FD;

    /* Neutral Palette */
    --color-white: #FFFFFF;
    --color-black: #1A1A1A;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #E0E0E0;
    --color-gray-400: #BDBDBD;
    --color-gray-500: #9E9E9E;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;

    /* Semantic Colors */
    --color-success: #00B74A;
    --color-success-bg: #E6F9EF;
    --color-warning: #FFA900;
    --color-warning-bg: #FFF8E6;
    --color-error: #F93154;
    --color-error-bg: #FDE8EC;
    --color-info: #39C0ED;
    --color-info-bg: #E8F9FD;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Borders */
    --border-radius-sm: 4px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-full: 9999px;
    --border-width: 1px;
    --border-color: var(--color-gray-300);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --header-height-mobile: 56px;
    --header-height-desktop: 72px;
    --bottom-nav-height: 56px;
    --sidebar-width: 250px;
    --container-max-width: 1200px;
    --content-padding: var(--space-4);

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-toast: 600;
    --z-tooltip: 700;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-secondary-dark);
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

/* --- Container --- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    background: var(--color-white);
    border-bottom: var(--border-width) solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    height: var(--header-height-mobile);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
    flex-shrink: 0;
}

.header-logo img {
    height: 32px;
    width: auto;
}

.header-search {
    flex: 1;
    max-width: 600px;
    margin: 0 var(--space-4);
    position: relative;
}

.header-search input {
    width: 100%;
    padding: var(--space-2) var(--space-4);
    padding-right: var(--space-10);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    outline: none;
    transition: border-color var(--transition-fast);
    background: var(--color-gray-50);
}

.header-search input:focus {
    border-color: var(--color-primary);
    background: var(--color-white);
}

.header-search button {
    position: absolute;
    right: var(--space-1);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--space-2) var(--space-3);
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.header-search button:hover {
    background: var(--color-primary-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.header-action-btn {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2);
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.header-action-btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.header-action-btn svg,
.header-action-btn .icon {
    width: 24px;
    height: 24px;
}

/* --- Bottom Navigation (Mobile) --- */
.bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: var(--color-white);
    border-top: var(--border-width) solid var(--color-gray-200);
    box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.05);
    height: var(--bottom-nav-height);
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-1);
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

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

.bottom-nav-item svg,
.bottom-nav-item .nav-icon {
    width: 24px;
    height: 24px;
}

.bottom-nav-item .badge {
    position: absolute;
    top: 2px;
    right: 50%;
    transform: translateX(18px);
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: var(--border-radius-full);
    font-size: 11px;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    background: var(--color-primary);
    line-height: 1;
}

.badge-active {
    display: inline-flex;
}

.badge:empty,
.badge:not(.badge-active) {
    display: none;
}

.badge-success { background: var(--color-success); }
.badge-warning { background: var(--color-warning); color: var(--color-gray-900); }
.badge-danger { background: var(--color-error); }
.badge-info { background: var(--color-info); }
.badge-primary { background: var(--color-primary); }
.badge-secondary { background: var(--color-gray-500); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary-bg);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-700);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
}

.btn-danger {
    background: var(--color-error);
    color: var(--color-white);
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background: #D92644;
}

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
    border-color: var(--color-success);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--space-3) var(--space-8);
    font-size: var(--font-size-lg);
}

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

.btn-icon {
    padding: var(--space-2);
    min-width: 40px;
    min-height: 40px;
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    margin-bottom: var(--space-1);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
    background: var(--color-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(238, 77, 45, 0.1);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-input.error {
    border-color: var(--color-error);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(249, 49, 84, 0.1);
}

.form-error {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--color-error);
}

.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
    background: var(--color-white);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23757575' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(238, 77, 45, 0.1);
}

.form-textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
    background: var(--color-white);
    resize: vertical;
    outline: none;
    font-family: inherit;
}

.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(238, 77, 45, 0.1);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.form-hint {
    display: block;
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* --- Cards --- */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: var(--space-4);
}

.card-header {
    padding: var(--space-4);
    border-bottom: var(--border-width) solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-footer {
    padding: var(--space-4);
    border-top: var(--border-width) solid var(--color-gray-200);
}

/* --- Product Card --- */
.product-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.product-card-image {
    position: relative;
    width: 100%;
    padding-top: 100%;
    background: var(--color-gray-100);
    overflow: hidden;
}

.product-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-card-image img {
    transform: scale(1.05);
}

.product-card-badge {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    z-index: 1;
}

.product-card-wishlist {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    z-index: 1;
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-full);
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-gray-500);
    font-size: 18px;
}

.product-card-wishlist:hover,
.product-card-wishlist.wishlisted {
    color: var(--color-error);
}

.product-card-body {
    padding: var(--space-3);
}

.product-card-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    color: var(--color-gray-900);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-2);
    min-height: 2.5em;
}

.product-card-price {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-1);
}

.product-card-price-current {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.product-card-price-original {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-decoration: line-through;
}

.product-card-price-discount {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-error);
    background: var(--color-error-bg);
    padding: 1px 4px;
    border-radius: var(--border-radius-sm);
}

.product-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.product-card-rating {
    display: flex;
    align-items: center;
    gap: 2px;
    color: var(--color-warning);
}

.product-card-rating span {
    color: var(--color-gray-500);
    margin-left: 2px;
}

/* --- Grid Layouts --- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    padding: var(--space-3);
}

@media (min-width: 480px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
        padding: var(--space-4);
    }
}

@media (min-width: 768px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1366px) {
    .product-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* --- Star Rating --- */
.star-rating {
    display: inline-flex;
    align-items: center;
    gap: 1px;
}

.star {
    font-size: 14px;
    line-height: 1;
}

.star-filled {
    color: #FFA900;
}

.star-half {
    color: #FFA900;
    position: relative;
}

.star-empty {
    color: var(--color-gray-300);
}

/* --- Toast Notifications --- */
.toast {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + var(--space-4));
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    z-index: var(--z-toast);
    min-width: 280px;
    max-width: 90vw;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
    color: var(--color-white);
}

.toast-show {
    transform: translateX(-50%) translateY(0);
}

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

.toast-error {
    background: var(--color-error);
}

.toast-warning {
    background: var(--color-warning);
    color: var(--color-gray-900);
}

.toast-info {
    background: var(--color-info);
    color: var(--color-gray-900);
}

/* --- Loading Spinner --- */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-10);
    color: var(--color-gray-500);
    gap: var(--space-3);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-4);
    color: var(--color-gray-500);
    text-align: center;
    gap: var(--space-3);
}

.empty-icon {
    font-size: 48px;
    opacity: 0.5;
}

.empty-state p {
    font-size: var(--font-size-sm);
}

/* --- Error State --- */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-4);
    color: var(--color-error);
    text-align: center;
    gap: var(--space-3);
}

.error-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-error-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: var(--font-weight-bold);
}

/* --- Dialog / Modal --- */
.dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal-backdrop);
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn 0.2s ease;
}

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

.dialog-confirm {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-xl);
}

.dialog-content p {
    margin-bottom: var(--space-4);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* --- Pagination --- */
.pagination {
    display: flex;
    justify-content: center;
    padding: var(--space-4);
}

.pagination-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: var(--border-width) solid var(--color-gray-300);
    background: var(--color-white);
}

.pagination-link:hover {
    background: var(--color-gray-100);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination-link.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination-ellipsis {
    padding: var(--space-1) var(--space-2);
    color: var(--color-gray-500);
}

/* --- Order Timeline --- */
.order-timeline {
    display: flex;
    overflow-x: auto;
    padding: var(--space-4) 0;
    gap: 0;
    position: relative;
}

.timeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    min-width: 80px;
    flex: 1;
    position: relative;
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    text-align: center;
}

.timeline-step::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    right: -50%;
    height: 2px;
    background: var(--color-gray-300);
    z-index: 0;
}

.timeline-step:last-child::before {
    display: none;
}

.timeline-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-gray-300);
    z-index: 1;
    position: relative;
}

.timeline-completed .timeline-dot {
    background: var(--color-success);
}

.timeline-completed::before {
    background: var(--color-success);
}

.timeline-active .timeline-dot {
    background: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-bg);
}

.timeline-active .timeline-label {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.timeline-completed .timeline-label {
    color: var(--color-success);
}

.timeline-cancelled .timeline-dot {
    background: var(--color-error);
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-gray-500); }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

.w-full { width: 100%; }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.relative { position: relative; }
.absolute { position: absolute; }

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

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

/* --- Scroll Sentinel --- */
.scroll-sentinel {
    height: 1px;
    width: 100%;
}

/* --- Responsive: Tablet & Desktop --- */
@media (min-width: 768px) {
    :root {
        --content-padding: var(--space-6);
    }

    .header {
        height: var(--header-height-desktop);
    }

    .bottom-nav {
        display: none;
    }

    body {
        padding-bottom: 0;
    }

    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 1024px) {
    :root {
        --content-padding: var(--space-8);
    }

    .container {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}

@media (min-width: 1440px) {
    .container {
        padding-left: 0;
        padding-right: 0;
    }
}

/* --- Print Styles --- */
@media print {
    .header,
    .bottom-nav,
    .toast,
    .dialog-overlay {
        display: none !important;
    }

    body {
        background: white;
    }
}