:root {
    --primary-dark: #1a1a1a;
    --secondary-dark: #222423;
    --accent-gold: #ad954e;
    --accent-orange: #b19f63;
    --text-light: #ecf0f1;
    --text-muted: #bdc3c7;
    --success-green: #27ae60;
    --error-red: #e74c3c;
    --card-bg: rgba(26, 26, 26, 0.95);
    --card-hover: rgba(34, 36, 35, 0.95);
    --border-color: rgba(173, 149, 78, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #0a0a0a;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.2) 2px,
            rgba(0, 0, 0, 0.2) 4px
        ),
        linear-gradient(135deg, #1a1a1a 0%, #222423 100%);
    background-attachment: fixed;
    color: var(--text-light);
    min-height: 100vh;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--accent-gold);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-gold);
    text-decoration: none;
}

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

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-donate {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    color: white !important;
}

.nav-donate:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(243, 156, 18, 0.3);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(180deg, rgba(0,0,0,0.2) 0%, transparent 100%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.donation-wrapper {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

/* Left Section */
.left-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Amount Grid */
.amount-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.amount-btn {
    padding: 1rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.amount-btn:hover {
    background: var(--card-hover);
    border-color: var(--accent-gold);
    transform: translateY(-2px);
}

.amount-btn.active {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    border-color: var(--accent-gold);
    color: white;
    box-shadow: 0 5px 15px rgba(173, 149, 78, 0.3);
}

/* Form Section */
.form-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.donation-form h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--accent-gold);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-light);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: rgba(0,0,0,0.4);
}

.form-control option {
    background: var(--secondary-dark);
    color: var(--text-light);
}

/* Token Display */
.token-display {
    text-align: center;
    margin: 1.5rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(243, 156, 18, 0.1), rgba(230, 126, 34, 0.1));
    border: 2px solid var(--border-color);
    border-radius: 16px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.token-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.token-icon {
    font-size: 3rem;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(10deg); }
}

.token-value {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    min-width: 200px;
    display: inline-block;
    text-align: center;
}

.token-label {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-light);
}

.token-breakdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem 0;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
}

.base-amount {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.bonus-separator {
    color: var(--accent-gold);
    font-weight: 700;
    font-size: 1.2rem;
}

.bonus-amount {
    color: var(--accent-gold);
    font-size: 0.95rem;
    font-weight: 600;
}

.price-tag {
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 25px;
    display: inline-block;
}

.price-tag span {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 600;
}

.price-tag #currentAmount {
    color: var(--accent-gold);
    font-weight: 800;
}

/* Old amount display removed */
.amount-display {
    text-align: center;
    margin: 1.5rem 0;
}

.amount-value {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slider-container {
    margin: 2rem 0;
    padding: 3rem 1rem 3rem 1rem;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
}

/* Ion Range Slider Customization */
.irs--flat {
    height: 60px;
}

.irs--flat .irs-line {
    height: 8px;
    background: rgba(173, 149, 78, 0.2);
    border-radius: 8px;
}

.irs--flat .irs-bar {
    height: 8px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-orange));
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(173, 149, 78, 0.3);
}

.irs--flat .irs-handle {
    width: 28px;
    height: 28px;
    top: 18px;
    background: white;
    border: 4px solid var(--accent-gold);
    box-shadow: 0 4px 12px rgba(173, 149, 78, 0.4);
    cursor: pointer;
    border-radius: 50%;
}

.irs--flat .irs-handle>i:first-child {
    display: none;
}

.irs--flat .irs-handle:hover {
    transform: scale(1.1);
}

.irs--flat .irs-min, .irs--flat .irs-max {
    background: var(--accent-gold);
    color: white;
    padding: 3px 8px;
    border-radius: 8px;
    font-weight: 600;
}

.irs--flat .irs-from, .irs--flat .irs-to, .irs--flat .irs-single {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    padding: 4px 10px;
    border-radius: 8px;
    font-weight: 600;
}

.irs--flat .irs-from:before, .irs--flat .irs-to:before, .irs--flat .irs-single:before {
    border-top-color: var(--accent-gold);
}

.irs--flat .irs-grid-text {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    bottom: -30px;
}

.irs--flat .irs-grid-pol {
    background: var(--border-color);
}

/* Position bonus labels above slider */
.irs--flat .irs-single {
    background: var(--accent-gold);
    color: white;
    font-weight: 600;
    font-size: 12px;
    padding: 4px 8px;
    top: -35px;
}

.irs--flat .irs-single:before {
    border-top-color: var(--accent-gold);
}

/* Old amount grid removed */
.amount-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.amount-btn {
    padding: 1rem;
    background: rgba(0,0,0,0.3);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.amount-btn:hover {
    background: rgba(243, 156, 18, 0.1);
    border-color: var(--accent-gold);
    transform: translateY(-2px);
}

.amount-btn.active {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    border-color: var(--accent-gold);
    color: white;
}

/* Rewards Display */
.rewards-display {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.reward-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.reward-label {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.reward-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-light);
}

.reward-item.bonus .reward-value {
    color: var(--accent-gold);
}

.reward-item.total {
    padding-top: 1rem;
    margin-top: 0.5rem;
    border-top: 2px solid var(--accent-gold);
}

.reward-item.total .reward-label {
    font-weight: 600;
    color: var(--text-light);
    font-size: 1.1rem;
}

.reward-item.total .reward-value {
    font-size: 1.5rem;
    color: var(--accent-gold);
}

/* Checkbox */
.checkbox-group {
    margin: 1.5rem 0;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-gold);
}

.checkbox-label span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.link {
    color: var(--accent-gold);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* Loading Indicator */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(243, 156, 18, 0.1);
    border: 1px solid var(--accent-gold);
    border-radius: 8px;
    margin: 1rem 0;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(243, 156, 18, 0.3);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Error Message */
.error-message {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error-red);
    border-radius: 8px;
    padding: 1rem;
    color: var(--error-red);
    margin: 1rem 0;
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    border: 2px solid var(--accent-gold);
    border-radius: 8px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(173, 149, 78, 0.4);
    background: linear-gradient(135deg, #c0a860, var(--accent-gold));
}

.submit-btn:active {
    transform: translateY(0);
}

.secure-note {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--secondary-dark);
    margin: 5% auto;
    padding: 2rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--accent-gold);
}

.success-modal {
    text-align: center;
    padding: 3rem;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    margin: 0 auto 1.5rem;
}

.success-modal h2 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.success-modal p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.modal-btn {
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.modal-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(243, 156, 18, 0.3);
}

/* Responsive Design */
@media (max-width: 968px) {
    .donation-wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .amount-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .amount-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-section {
        padding: 1.5rem;
    }
}