/* Apple-style Dark Theme - Completely Redesigned */

:root {
    /* Apple Dark Colors */
    --black: #000000;
    --gray-900: #1c1c1e;
    --gray-800: #2c2c2e;
    --gray-700: #3a3a3c;
    --gray-600: #48484a;
    --gray-500: #636366;
    --gray-400: #8e8e93;
    --gray-300: #aeaeb2;
    --gray-200: #c7c7cc;
    --gray-100: #d1d1d6;
    --white: #ffffff;
    
    /* Apple Blue */
    --blue: #007aff;
    --blue-dark: #0051d5;
    
    /* Apple Green */
    --green: #30d158;
    --green-dark: #248a3d;
    
    /* Apple Orange */
    --orange: #ff9500;
    
    /* Semantic Colors */
    --bg-primary: var(--black);
    --bg-secondary: var(--gray-900);
    --bg-tertiary: var(--gray-800);
    --bg-card: var(--gray-800);
    
    --text-primary: var(--white);
    --text-secondary: var(--gray-300);
    --text-tertiary: var(--gray-400);
    
    --border: var(--gray-600);
    --border-light: var(--gray-700);
    
    /* Apple Typography Scale */
    --text-xs: 11px;
    --text-sm: 13px;
    --text-base: 17px;
    --text-lg: 21px;
    --text-xl: 28px;
    --text-2xl: 34px;
    --text-3xl: 48px;
    --text-4xl: 64px;
    
    /* Apple Spacing Scale */
    --space-2: 2px;
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-20: 20px;
    --space-24: 24px;
    --space-32: 32px;
    --space-40: 40px;
    --space-48: 48px;
    --space-64: 64px;
    --space-80: 80px;
    --space-96: 96px;
    
    /* Apple Border Radius */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Apple Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Featured Slider Styles - 완전 재구축 */
.featured-slider-container {
    position: relative;
    width: 100%;
    height: 300px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.featured-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.featured-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease-in-out;
    z-index: 1;
}

.featured-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.slide-background {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.6), rgba(0,0,0,0.1));
}

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    color: white;
    z-index: 3;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.slide-title {
    font-size: 28px;
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: 8px;
    color: #ffffff;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.8);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

.slide-subtitle {
    font-size: 18px;
    font-weight: 500;
    color: #f8f9fa;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.8);
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.5));
}

/* 네비게이션 버튼 */
.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 8px;
    z-index: 10;
    pointer-events: none;
}

.nav-btn {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    user-select: none;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.nav-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.nav-btn:active {
    transform: scale(1.05);
}

/* 인디케이터 */
.slider-indicators {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 10;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.2);
}

.indicator.active {
    background: white;
    border-color: white;
    transform: scale(1.4);
    box-shadow: 0 1px 6px rgba(255, 255, 255, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', Helvetica, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--text-base);
    line-height: 1.47;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Layout */
.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--space-20);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(28, 28, 30, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--border);
    z-index: 9999;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    position: relative;
}

.logo {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.022em;
    z-index: 10;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    cursor: pointer;
    position: relative;
    z-index: 10;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 1px;
    background: var(--text-primary);
    margin: 3px auto;
    transition: 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-32);
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 400;
    letter-spacing: -0.016em;
    transition: color 0.15s ease;
    display: block;
    padding: var(--space-8) 0;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-40);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 9;
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links a {
        font-size: var(--text-xl);
        font-weight: 600;
        padding: var(--space-16) 0;
    }
}

/* Main Content */
main {
    min-height: calc(100vh - 96px);
}

/* Typography */
h1 {
    font-size: var(--text-3xl);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.003em;
    color: var(--text-primary);
    margin-bottom: var(--space-24);
}

h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.003em;
    color: var(--text-primary);
    margin-bottom: var(--space-20);
}

h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: 1.14;
    letter-spacing: -0.003em;
    color: var(--text-primary);
    margin-bottom: var(--space-16);
}

p {
    font-size: var(--text-base);
    line-height: 1.47;
    color: var(--text-secondary);
    margin-bottom: var(--space-20);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    padding: 12px 22px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-weight: 400;
    letter-spacing: -0.022em;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    min-height: 44px;
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 0.5px solid var(--border);
}

.btn-secondary:hover {
    background: var(--gray-700);
    border-color: var(--gray-500);
}

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

.btn-success:hover {
    background: var(--green-dark);
}

/* Button Groups */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-12);
    align-items: center;
    justify-content: center;
}

.filter-btn.active {
    background: var(--blue) !important;
    color: var(--white) !important;
    border-color: var(--blue) !important;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 0.5px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-40);
    transition: all 0.15s ease;
}

.card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-24);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* Forms */
.form-group {
    margin-bottom: var(--space-24);
}

.form-label {
    display: block;
    margin-bottom: var(--space-8);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.016em;
}

.form-input, select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-family: inherit;
    transition: all 0.15s ease;
    min-height: 44px;
}

.form-input:focus, select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-96) 0 var(--space-80) 0;
}

.hero h1 {
    margin-bottom: var(--space-20);
}

.hero p {
    font-size: var(--text-lg);
    max-width: 560px;
    margin: 0 auto var(--space-48) auto;
}

/* Sections */
.section {
    padding: var(--space-80) 0;
}

.section-sm {
    padding: var(--space-48) 0;
}

/* Event Cards */
.event-card {
    background: var(--bg-card);
    border: 0.5px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.15s ease;
    cursor: pointer;
}

.event-card:hover {
    border-color: var(--border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.event-image {
    height: 120px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    border-bottom: 0.5px solid var(--border-light);
}

.event-content {
    padding: var(--space-24);
}

.event-title {
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: 1.19;
    margin-bottom: var(--space-12);
    color: var(--text-primary);
}

.event-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.event-type, .event-status, .event-date {
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.event-type {
    background: rgba(0, 122, 255, 0.15);
    color: var(--blue);
}

.event-status.active {
    background: rgba(48, 209, 88, 0.15);
    color: var(--green);
}

.event-status.ended {
    background: rgba(255, 149, 0, 0.15);
    color: var(--orange);
}

.event-date {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.event-description {
    font-size: var(--text-base);
    line-height: 1.47;
    color: var(--text-secondary);
    margin-bottom: var(--space-20);
}

.event-actions {
    display: flex;
    gap: var(--space-12);
    align-items: center;
}

/* Calculator Styles */
.calculator-header {
    text-align: center;
    padding: var(--space-80) 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-48);
}

.calculator-title {
    color: var(--green);
    margin-bottom: var(--space-16);
}

.calculator-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

.calculator-section {
    background: var(--bg-card);
    border: 0.5px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-48);
    margin-bottom: var(--space-32);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-40);
}

.section-header h2 {
    margin-bottom: var(--space-12);
}

.section-header p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Event Selection */
.event-select-input {
    margin-bottom: var(--space-32);
}

.event-card-mini {
    display: flex;
    align-items: center;
    gap: var(--space-20);
    background: var(--bg-tertiary);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
}

.event-icon {
    font-size: var(--text-xl);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue);
    border-radius: 50%;
    color: var(--white);
    flex-shrink: 0;
}

.event-details h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
}

.event-details p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
}

.event-details p:last-child {
    margin-bottom: 0;
}

/* Goods Grid */
.goods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-24);
}

.goods-item {
    background: var(--bg-tertiary);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    transition: all 0.15s ease;
}

.goods-item:hover {
    border-color: var(--gray-500);
}

.goods-item.selected {
    border-color: var(--green);
    background: rgba(48, 209, 88, 0.05);
}

.goods-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-12);
}

.goods-name {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.goods-price {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--green);
    font-variant-numeric: tabular-nums;
}

.goods-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-20);
    font-size: var(--text-sm);
    line-height: 1.43;
}

.goods-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--space-12);
}

.quantity-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all 0.15s ease;
}

.quantity-btn:hover {
    background: var(--blue);
    color: var(--white);
}

.quantity-input {
    width: 60px;
    text-align: center;
    background: var(--bg-secondary);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: var(--space-8);
    font-size: var(--text-sm);
    font-variant-numeric: tabular-nums;
}

.goods-subtotal {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--green);
    font-variant-numeric: tabular-nums;
}

/* Total Amount Card */
.total-amount-card {
    background: var(--green);
    color: var(--white);
    padding: var(--space-48);
    border-radius: var(--radius-xl);
    text-align: center;
    margin-bottom: var(--space-32);
}

.total-label {
    font-size: var(--text-lg);
    margin-bottom: var(--space-12);
    opacity: 0.9;
}

.total-amount {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-8);
    font-variant-numeric: tabular-nums;
}

.total-items {
    font-size: var(--text-base);
    opacity: 0.9;
}

.result-actions {
    display: flex;
    gap: var(--space-12);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-32);
}

.selected-goods {
    background: var(--bg-tertiary);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-32);
}

.selected-goods h3 {
    margin-bottom: var(--space-24);
}

.selected-goods-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.selected-goods-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-16);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.selected-goods-name {
    font-weight: 600;
    color: var(--text-primary);
}

.selected-goods-details {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--space-2);
}

.selected-goods-price {
    font-weight: 600;
    color: var(--green);
    font-variant-numeric: tabular-nums;
}

/* Feature Cards */
.feature-card {
    text-align: center;
    padding: var(--space-40);
    background: var(--bg-card);
    border: 0.5px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: all 0.15s ease;
}

.feature-card:hover {
    border-color: var(--border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-20);
}

.feature-card h3 {
    margin-bottom: var(--space-12);
    font-size: var(--text-lg);
}

.feature-card p {
    font-size: var(--text-base);
    line-height: 1.47;
    margin-bottom: 0;
}

/* Footer */
.footer {
    border-top: 0.5px solid var(--border);
    padding: var(--space-48) 0;
    margin-top: var(--space-96);
}

.footer-content {
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* Loading & Animations */
.loading {
    text-align: center;
    padding: var(--space-64);
    color: var(--text-secondary);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--bg-tertiary);
    border-radius: 50%;
    border-top-color: var(--blue);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-16);
}

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

.fade-in {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Pagination */
.pagination-btn {
    padding: 8px 16px;
    border: 0.5px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 400;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    margin: 0 var(--space-4);
}

.pagination-btn:hover {
    background: var(--gray-700);
    border-color: var(--gray-500);
}

.pagination-btn.active {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}

/* Empty and Error States */
.empty-state, .error-state {
    text-align: center;
    padding: var(--space-80);
    color: var(--text-secondary);
}

.empty-state h3, .error-state h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-16);
}

.empty-state p, .error-state p {
    margin-bottom: var(--space-24);
}

/* Loading States */
.loading-container {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-64);
    color: var(--text-secondary);
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--bg-tertiary);
    border-radius: 50%;
    border-top-color: var(--blue);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-16);
}

.loading-goods {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-48);
    color: var(--text-secondary);
}

.no-goods {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-64);
    color: var(--text-secondary);
}

.no-goods h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-16);
}

.no-goods p {
    margin-bottom: var(--space-24);
}

/* Calculator Help Section */
.calculator-help {
    background: var(--bg-card);
    border: 0.5px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-48);
    margin-top: var(--space-64);
}

.help-header {
    text-align: center;
    margin-bottom: var(--space-40);
}

.help-header h2 {
    margin-bottom: var(--space-12);
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-32);
}

.help-item {
    text-align: center;
    padding: var(--space-32);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    transition: all 0.15s ease;
}

.help-item:hover {
    background: var(--gray-700);
    transform: translateY(-2px);
}

.help-icon {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-20);
}

.help-item h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-12);
}

.help-item p {
    font-size: var(--text-base);
    line-height: 1.47;
    margin-bottom: 0;
}

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

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

.gap-sm { gap: var(--space-8); }
.gap-md { gap: var(--space-12); }
.gap-lg { gap: var(--space-16); }

.mb-xs { margin-bottom: var(--space-8); }
.mb-sm { margin-bottom: var(--space-12); }
.mb-md { margin-bottom: var(--space-16); }
.mb-lg { margin-bottom: var(--space-24); }
.mb-xl { margin-bottom: var(--space-32); }
.mb-2xl { margin-bottom: var(--space-48); }

.mt-xs { margin-top: var(--space-8); }
.mt-sm { margin-top: var(--space-12); }
.mt-md { margin-top: var(--space-16); }
.mt-lg { margin-top: var(--space-24); }
.mt-xl { margin-top: var(--space-32); }
.mt-2xl { margin-top: var(--space-48); }

.hidden { display: none; }
.block { display: block; }

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--space-16);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: var(--text-2xl);
        line-height: 1.12;
    }
    
    h2 {
        font-size: var(--text-xl);
        line-height: 1.14;
    }
    
    .hero {
        padding: var(--space-64) 0 var(--space-48) 0;
    }
    
    .hero p {
        font-size: var(--text-base);
    }
    
    .calculator-header {
        padding: var(--space-48) 0;
    }
    
    .calculator-section {
        padding: var(--space-32);
    }
    
    .card {
        padding: var(--space-32);
    }
    
    .feature-card {
        padding: var(--space-32);
    }
    
    .btn-group {
        justify-content: center;
        gap: var(--space-8);
    }
    
    .btn-group .btn {
        flex: 1;
        min-width: 0;
        max-width: 200px;
    }
    
    .goods-grid {
        grid-template-columns: 1fr;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .event-card-mini {
        flex-direction: column;
        text-align: center;
        gap: var(--space-16);
    }
    
    .selected-goods-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-8);
    }
    
    .total-amount {
        font-size: var(--text-2xl);
    }
    
    .event-actions {
        flex-direction: column;
        gap: var(--space-8);
    }
    
    .event-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-12);
    }
    
    .hero {
        padding: var(--space-48) 0 var(--space-32) 0;
    }
    
    .calculator-header {
        padding: var(--space-32) 0;
    }
    
    .calculator-section {
        padding: var(--space-24);
    }
    
    .card {
        padding: var(--space-24);
    }
    
    .feature-card {
        padding: var(--space-24);
    }
    
    .section {
        padding: var(--space-48) 0;
    }
    
    .section-sm {
        padding: var(--space-32) 0;
    }
}