/**
 * EEUM Building Project - Donation Page Styles
 * Enhanced with Donor Tier System
 */

/* ========================================
   CSS VARIABLES & ROOT SETTINGS
   ======================================== */
:root {
    /* Primary Colors */
    --primary-color: #2C3E50;
    --secondary-color: #3498DB;
    --accent-color: #E74C3C;
    --success-color: #27AE60;
    --warning-color: #F39C12;
    --danger-color: #E74C3C;
    
    /* Text Colors */
    --text-color: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    
    /* Background Colors */
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --bg-dark: #2C3E50;
    
    /* Border & Shadow */
    --border-color: #E0E0E0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-white);
    overflow-x: hidden;
}

/* ========================================
   NAVIGATION BAR
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.btn-home {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white !important;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.btn-home:hover {
    background: var(--secondary-color);
}

.btn-donate-nav {
    padding: 0.5rem 1.5rem;
    background: var(--accent-color);
    color: white !important;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: background var(--transition-fast);
}

.btn-donate-nav:hover {
    background: #C0392B;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.3rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    margin-top: 70px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* Progress Bar */
.progress-container {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    height: 40px;
    overflow: hidden;
    margin: 2rem 0 1rem;
    position: relative;
}

.progress-bar {
    background: linear-gradient(90deg, #27AE60 0%, #2ECC71 100%);
    height: 100%;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    transition: width 1s ease;
    min-width: 60px;
}

.progress-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.progress-stats span {
    font-size: 1rem;
}

.progress-stats strong {
    font-weight: 600;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: #C0392B;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--bg-white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ========================================
   CONTAINER & SECTIONS
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* ========================================
   QUICK DONATE SECTION
   ======================================== */
.quick-donate {
    background: var(--bg-light);
}

.donate-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    max-width: 1000px;
    margin: 0 auto;
}

/* ========================================
   DONOR TIER STYLES
   ======================================== */
.tier-section {
    margin: 3rem 0;
    padding: 2rem 0;
}

.tier-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.tier-intro h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tier-intro p {
    font-size: 1.1rem;
    color: var(--text-light);
}

.tier-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tier-card {
    background: white;
    border: 3px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tier-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--tier-color);
    opacity: 0.8;
}

.tier-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--tier-color);
}

.tier-card.selected {
    border-color: var(--tier-color);
    border-width: 3px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    background: linear-gradient(to bottom, rgba(255,255,255,1) 0%, rgba(255,255,255,0.95) 100%);
}

.tier-card.selected::after {
    content: '✓ SELECTED';
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--tier-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: bold;
}

.tier-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.tier-icon {
    font-size: 2.5rem;
}

.tier-title {
    flex: 1;
}

.tier-title h4 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--tier-color);
}

.tier-range {
    font-size: 1.1rem;
    font-weight: bold;
    color: #333;
    margin-top: 0.3rem;
}

.tier-description {
    font-style: italic;
    color: #666;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.tier-benefits {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tier-benefits li {
    padding: 0.4rem 0;
    color: #555;
    font-size: 0.9rem;
    display: flex;
    align-items: start;
    gap: 0.5rem;
}

.tier-benefits li::before {
    content: '✓';
    color: var(--tier-color);
    font-weight: bold;
    flex-shrink: 0;
}


.tier-benefits {
    display: none;
}

.tier-count {
    display: none;
}



.tier-count {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: #888;
    text-align: center;
}

/* ========================================
   AMOUNT SELECTION SECTION
   ======================================== */
.amount-section {
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    display: none;
}

.amount-section.active {
    display: block;
    animation: slideDown 0.3s ease;
}

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

.selected-tier-display {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--tier-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.selected-tier-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.selected-tier-info .tier-icon {
    font-size: 2rem;
}

.selected-tier-details h4 {
    margin: 0;
    color: var(--tier-color);
}

.selected-tier-details p {
    margin: 0.3rem 0 0 0;
    color: #666;
    font-size: 0.9rem;
}

.change-tier-btn {
    background: none;
    border: 2px solid #ddd;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: #666;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.change-tier-btn:hover {
    border-color: #999;
    color: #333;
    background: rgba(0,0,0,0.02);
}

.suggested-amounts {
    margin: 1.5rem 0;
}

.suggested-amounts label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: #333;
    font-size: 1rem;
}

.amount-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.amount-btn-new {
    padding: 1rem;
    border: 2px solid #ddd;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    color: #333;
    transition: all var(--transition-fast);
}

.amount-btn-new:hover {
    border-color: var(--tier-color);
    background: rgba(0,0,0,0.02);
    transform: translateY(-2px);
}

.amount-btn-new.selected {
    border-color: var(--tier-color);
    background: var(--tier-color);
    color: white;
}

.amount-btn-new.recommended {
    border-color: var(--tier-color);
    position: relative;
}

.amount-btn-new.recommended::after {
    content: 'RECOMMENDED';
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--tier-color);
    color: white;
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
}

.custom-amount-wrapper {
    margin-top: 1rem;
}

.custom-amount-wrapper label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.custom-amount-input {
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid #ddd;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.custom-amount-input:focus-within {
    border-color: var(--tier-color);
}

.custom-amount-input span {
    padding: 1rem;
    background: var(--bg-light);
    color: #666;
    font-weight: bold;
    font-size: 1.2rem;
}

.custom-amount-input input {
    flex: 1;
    border: none;
    padding: 1rem;
    font-size: 1.2rem;
    outline: none;
}

.amount-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.amount-feedback.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.amount-feedback.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.amount-feedback.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* ========================================
   DONOR INFO & FORMS
   ======================================== */
.donor-info-section {
    margin-top: 2rem;
    padding: 2rem;
    background: white;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.donor-info-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

/* ========================================
   PAYMENT SECTION
   ======================================== */
.payment-section {
    margin-top: 2rem;
    padding: 2rem;
    background: white;
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.payment-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.payment-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-light);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--secondary-color);
}

.tab-btn.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

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

.note-box {
    background: #FFF9E6;
    border-left: 4px solid var(--warning-color);
    padding: 1rem;
    margin: 1rem 0;
    border-radius: var(--radius-md);
}

.note-box strong {
    color: var(--warning-color);
}

.copy-box {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
    align-items: center;
}

.copy-box code {
    flex: 1;
    background: var(--bg-light);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
}

.btn-copy {
    padding: 0.75rem 1.5rem;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-fast);
}

.btn-copy:hover {
    background: #2980B9;
}

.bank-info {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.bank-info h4 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.info-item {
    background: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.info-item strong {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
}

.info-item span {
    display: block;
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 600;
}

/* ========================================
   DONATION METHODS SECTION
   ======================================== */
.donation-methods {
    background: white;
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.method-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.method-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.method-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.method-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.method-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq-section {
    background: var(--bg-light);
}

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: bold;
}

.faq-item.active .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
    color: var(--text-light);
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

.faq-answer a {
    color: var(--secondary-color);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-section {
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info h3,
.contact-form h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.contact-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item h4 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.contact-item p {
    margin: 0.3rem 0;
    color: var(--text-light);
}

.contact-item a {
    color: var(--secondary-color);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.resource-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.resource-link {
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-color);
    transition: all var(--transition-fast);
}

.resource-link:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateX(5px);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    font-size: 1.5rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.social-links a:hover {
    transform: scale(1.2);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.subscribe-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.subscribe-form input {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: var(--radius-md);
    outline: none;
}

.subscribe-form button {
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-fast);
}

.subscribe-form button:hover {
    background: #C0392B;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.7);
    margin: 0.5rem 0;
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255,255,255,0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* ========================================
   COPY SUCCESS MESSAGE
   ======================================== */
.copy-success {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--success-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    animation: slideInUp 0.3s ease;
    z-index: 1001;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        display: none;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tier-grid {
        grid-template-columns: 1fr;
    }
    
    .amount-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .donate-card {
        padding: 2rem 1.5rem;
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .selected-tier-display {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 3rem 1rem;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .donate-card {
        padding: 1.5rem 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .amount-buttons {
        grid-template-columns: 1fr;
    }
    
    .tier-card {
        padding: 1rem;
    }
    
    .tier-icon {
        font-size: 2rem;
    }
    
    .payment-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        text-align: center;
    }
    
    .copy-success {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        text-align: center;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.p-1 { padding: 1rem; }
.p-2 { padding: 2rem; }
.p-3 { padding: 3rem; }

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .navbar,
    .hamburger,
    .footer,
    .payment-section,
    .social-links {
        display: none;
    }
    
    .hero {
        background: white;
        color: black;
    }
    
    body {
        font-size: 12pt;
    }
}