:root {
    --bg-color: #020617;
    --card-bg: rgba(15, 23, 42, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --btc-color: #f7931a;
    --erc-color: #6366f1;
    --success: #10b981;
    --glass-blur: 15px;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background Animations */
.background-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 20% 30%, rgba(247, 147, 26, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
}

.container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
    animation: fadeIn 1s ease-out;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.profile-container {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    position: relative;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--btc-color), var(--erc-color));
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.4);
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-color);
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Donation Grid */
.donation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-bottom: 4rem;
}

/* Card Styling */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.btc-card:hover {
    box-shadow: 0 0 30px rgba(247, 147, 26, 0.1);
}

.erc-card:hover {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.1);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    width: 100%;
}

.icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btc-icon {
    background: rgba(247, 147, 26, 0.15);
    color: var(--btc-color);
}

.erc-icon {
    background: rgba(99, 102, 241, 0.15);
    color: var(--erc-color);
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* QR Code Container */
.qr-container {
    background: white;
    padding: 1rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.qr-container:hover {
    transform: scale(1.05);
}

.qr-container canvas,
.qr-container img {
    display: block;
}

/* Address Box */
.address-box {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.address-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.address-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    word-break: break-all;
    user-select: all;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 8px;
    border-radius: 4px;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s;
}

.copy-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.copy-btn:active {
    transform: scale(0.9);
}

.crypto-note {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

.crypto-note b,
.crypto-note strong {
    color: var(--text-primary);
}

/* Footer */
footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }

    .hero {
        margin-bottom: 2.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    .donation-grid {
        grid-template-columns: 1fr;
    }
}