/* ============================================
   iHrb.shop Design System — Apple-style
   ============================================ */

/* --- Design Tokens --- */
:root {
    /* Colors — Apple System palette */
    --color-primary: #34C759;
    --color-primary-dark: #248A3D;
    --color-primary-light: #A8E6B4;
    --color-primary-bg: rgba(52, 199, 89, 0.08);
    --color-accent: #FF9500;
    --color-accent-dark: #C93400;
    --color-accent-bg: rgba(255, 149, 0, 0.1);

    --color-bg: #F2F2F7;
    --color-surface: #FFFFFF;
    --color-surface-secondary: #F9F9FB;
    --color-text: #1C1C1E;
    --color-text-secondary: #8E8E93;
    --color-text-tertiary: #AEAEB2;
    --color-separator: #E5E5EA;
    --color-separator-light: #F0F0F5;
    --color-destructive: #FF3B30;
    --color-destructive-bg: rgba(255, 59, 48, 0.1);
    --color-warning: #FF9500;
    --color-info: #007AFF;
    --color-star: #FF9500;

    /* Typography */
    --font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 15px;
    --font-size-md: 17px;
    --font-size-lg: 20px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 34px;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.2;
    --line-height-normal: 1.47;
    --line-height-relaxed: 1.6;

    /* Spacing */
    --space-2: 2px;
    --space-4: 4px;
    --space-6: 6px;
    --space-8: 8px;
    --space-10: 10px;
    --space-12: 12px;
    --space-16: 16px;
    --space-20: 20px;
    --space-24: 24px;
    --space-32: 32px;
    --space-40: 40px;
    --space-48: 48px;

    /* Border Radius */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 0.5px 1px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-float: 0 20px 60px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.06);

    /* Transitions */
    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 0.15s;
    --duration-normal: 0.25s;
    --duration-slow: 0.35s;
    --transition-fast: 0.15s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-normal: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);

    /* Z-index scale */
    --z-base: 1;
    --z-header: 100;
    --z-dropdown: 200;
    --z-modal: 500;
    --z-toast: 1000;

    /* Translucent surfaces (for blur backgrounds) */
    --color-header-bg: rgba(255, 255, 255, 0.85);
    --color-bottom-nav-bg: rgba(255, 255, 255, 0.88);
    --color-preloader-bg: rgba(255, 255, 255, 0.96);
    --color-overlay-bg: rgba(0, 0, 0, 0.4);
    --color-toast-bg: rgba(60, 60, 67, 0.95);
    --color-search-field-bg: rgba(118, 118, 128, 0.12);
    --color-search-field-focus: rgba(118, 118, 128, 0.18);
    --color-dropdown-bg: rgba(255, 255, 255, 0.96);
    --color-modal-bg: rgba(255, 255, 255, 0.95);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #1C1C1E;
        --color-surface: #2C2C2E;
        --color-surface-secondary: #3A3A3C;
        --color-text: #F2F2F7;
        --color-text-secondary: #98989D;
        --color-text-tertiary: #636366;
        --color-separator: #38383A;
        --color-separator-light: #2C2C2E;
        --color-primary-bg: rgba(52, 199, 89, 0.15);
        --color-destructive-bg: rgba(255, 59, 48, 0.15);
        --color-accent-bg: rgba(255, 149, 0, 0.15);

        --color-header-bg: rgba(28, 28, 30, 0.85);
        --color-bottom-nav-bg: rgba(28, 28, 30, 0.88);
        --color-preloader-bg: rgba(28, 28, 30, 0.96);
        --color-overlay-bg: rgba(0, 0, 0, 0.6);
        --color-toast-bg: rgba(58, 58, 60, 0.95);
        --color-search-field-bg: rgba(118, 118, 128, 0.24);
        --color-search-field-focus: rgba(118, 118, 128, 0.36);
        --color-dropdown-bg: rgba(44, 44, 46, 0.96);
        --color-modal-bg: rgba(44, 44, 46, 0.95);

        --shadow-xs: 0 0.5px 1px rgba(0, 0, 0, 0.2);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.2);
        --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.2);
        --shadow-float: 0 20px 60px rgba(0, 0, 0, 0.5), 0 4px 16px rgba(0, 0, 0, 0.25);
    }
}

/* --- Base Reset --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

input, select, textarea {
    font-family: inherit;
    font-size: 16px;
    border: none;
    outline: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* --- Utility Classes --- */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
}

/* --- Shared Components --- */

/* Cards */
.ds-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* Grouped List (iOS Settings-style) */
.ds-grouped-list {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ds-grouped-list-item {
    padding: var(--space-12) var(--space-16);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 0.5px solid var(--color-separator);
    min-height: 44px;
}

.ds-grouped-list-item:last-child {
    border-bottom: none;
}

.ds-grouped-list-label {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.ds-grouped-list-value {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    text-align: right;
}

/* Section Title */
.ds-section-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    letter-spacing: -0.3px;
    margin-bottom: var(--space-16);
}

.ds-section-subtitle {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-regular);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-8);
    padding-left: var(--space-4);
}

/* Buttons */
.ds-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    -webkit-appearance: none;
    white-space: nowrap;
}

.ds-btn:active {
    transform: scale(0.97);
    opacity: 0.85;
}

.ds-btn-primary {
    background: var(--color-primary);
    color: #FFFFFF;
    padding: var(--space-12) var(--space-24);
    font-size: var(--font-size-md);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(52, 199, 89, 0.2);
}

.ds-btn-primary:hover {
    background: var(--color-primary-dark);
}

.ds-btn-primary-lg {
    padding: var(--space-16) var(--space-32);
    font-size: var(--font-size-md);
    border-radius: var(--radius-md);
    width: 100%;
}

.ds-btn-secondary {
    background: var(--color-primary-bg);
    color: var(--color-primary);
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-base);
}

.ds-btn-ghost {
    background: transparent;
    color: var(--color-primary);
    padding: var(--space-8) var(--space-12);
    font-size: var(--font-size-base);
}

.ds-btn-accent {
    background: var(--color-accent);
    color: #FFFFFF;
    padding: var(--space-12) var(--space-24);
    font-size: var(--font-size-md);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(255, 149, 0, 0.2);
}

.ds-btn-destructive {
    background: var(--color-destructive-bg);
    color: var(--color-destructive);
    padding: var(--space-10) var(--space-16);
    font-size: var(--font-size-base);
}

/* Pill Buttons */
.ds-pill {
    border-radius: var(--radius-full);
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.ds-pill:active {
    transform: scale(0.95);
}

/* Inputs */
.ds-input {
    width: 100%;
    height: 44px;
    padding: 0 var(--space-16);
    background: var(--color-separator);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

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

.ds-input:focus {
    background: var(--color-surface);
    box-shadow: 0 0 0 3px var(--color-primary-bg), var(--shadow-sm);
}

/* Search Input (Apple-style) */
.ds-search {
    position: relative;
}

.ds-search-input {
    width: 100%;
    height: 36px;
    padding: 0 var(--space-12) 0 36px;
    background: rgba(118, 118, 128, 0.12);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

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

.ds-search-icon {
    position: absolute;
    left: var(--space-10);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    font-size: 14px;
    pointer-events: none;
}

/* Badge */
.ds-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    background: var(--color-destructive);
    color: #FFFFFF;
}

/* Toast Notification */
.ds-toast {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%) translateY(-120%);
    background: var(--color-toast-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: #FFFFFF;
    padding: var(--space-10) var(--space-20);
    border-radius: var(--radius-full);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-toast);
    transition: transform 0.4s var(--ease-spring);
    display: flex;
    align-items: center;
    gap: var(--space-8);
    max-width: calc(100vw - 32px);
    pointer-events: none;
}

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

.ds-toast-success {
    background: rgba(52, 199, 89, 0.95);
}

.ds-toast i {
    font-size: 16px;
}

/* Header */
.ds-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--color-header-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--color-separator);
}

.ds-header-inner {
    display: flex;
    align-items: center;
    gap: var(--space-10);
    padding: var(--space-8) var(--space-16);
    min-height: 44px;
}

.ds-header-btn {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--color-primary);
    font-size: 18px;
    transition: background var(--transition-fast);
    flex-shrink: 0;
}

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

.ds-header-btn:active {
    background: rgba(52, 199, 89, 0.15);
}

.ds-header-btn img {
    width: 22px;
    height: 22px;
}

/* Search in header */
.ds-header-search {
    flex: 1;
    position: relative;
}

.ds-header-search-input {
    width: 100%;
    height: 36px;
    padding: 0 40px 0 36px;
    background: var(--color-search-field-bg);
    border-radius: 10px;
    font-size: var(--font-size-md);
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.ds-header-search-input::placeholder {
    color: var(--color-text-tertiary);
}

.ds-header-search-input:focus {
    background: var(--color-search-field-focus);
}

.ds-header-search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    font-size: 14px;
    pointer-events: none;
}

.ds-header-search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--color-primary);
    color: #FFFFFF;
    font-size: 13px;
    transition: all var(--transition-fast);
}

.ds-header-search-btn:active {
    transform: translateY(-50%) scale(0.9);
}

/* Bottom Nav */
.ds-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: var(--color-bottom-nav-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 0.5px solid var(--color-separator);
    padding: var(--space-10) var(--space-16);
    padding-bottom: max(var(--space-10), env(safe-area-inset-bottom));
}

/* Quantity Controls */
.ds-qty {
    display: inline-flex;
    align-items: center;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    overflow: hidden;
    height: 34px;
}

.ds-qty-btn {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 14px;
    transition: background var(--transition-fast);
}

.ds-qty-btn:hover {
    background: var(--color-primary-bg);
}

.ds-qty-btn:active {
    background: rgba(52, 199, 89, 0.15);
}

.ds-qty-value {
    width: 36px;
    height: 34px;
    text-align: center;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    border: none;
    background: transparent;
}

/* Separator */
.ds-separator {
    height: 0.5px;
    background: var(--color-separator);
    margin: 0 var(--space-16);
}

/* Empty state */
.ds-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-48) var(--space-24);
    text-align: center;
}

.ds-empty-icon {
    font-size: 48px;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-16);
}

.ds-empty-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-8);
}

.ds-empty-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 280px;
    line-height: var(--line-height-relaxed);
}

/* Modal / Popup overlay */
.ds-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-overlay-bg);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.ds-overlay.active {
    opacity: 1;
    visibility: visible;
}

.ds-modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    max-width: 340px;
    width: calc(100% - 32px);
    box-shadow: var(--shadow-float);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.ds-overlay.active .ds-modal {
    transform: scale(1);
}

.ds-modal-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    margin-bottom: var(--space-8);
}

.ds-modal-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-20);
    line-height: var(--line-height-relaxed);
}

.ds-modal-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 0;
    height: 0;
}

/* Safe area support */
@supports (padding: env(safe-area-inset-bottom)) {
    .ds-bottom-nav {
        padding-bottom: max(var(--space-10), env(safe-area-inset-bottom));
    }
}