/* Import modern font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

:root {
    --primary-purple: #6B46C1;
    --primary-blue: #4C51BF;
    --dark-bg: #0F0A1F;
    --darker-bg: #0A0514;
    --card-bg: rgba(107, 70, 193, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #FFFFFF;
    --text-secondary: #B8B4C7;
    --glow-purple: rgba(107, 70, 193, 0.5);
    --glow-blue: rgba(76, 81, 191, 0.5);
    --success: #48BB78;
    --error: #F56565;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 50%, #1a0f2e 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Header with balances */
.header {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
}

.balance-card {
    flex: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.balance-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(107, 70, 193, 0.2);
}

.balance-icon {
    font-size: 32px;
    filter: drop-shadow(0 0 10px var(--glow-purple));
}

.balance-info {
    flex: 1;
}

.balance-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.balance-value {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #9F7AEA, #667EEA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Game area */
.game-area {
    text-align: center;
    margin-bottom: 40px;
}

.coin-container {
    position: relative;
}

.coin-level {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.coin-level span {
    color: var(--primary-purple);
    font-size: 18px;
}

.coin-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin: 20px auto;
    display: block;
    transition: transform 0.1s ease;
    position: relative;
}

.coin-button:active {
    transform: scale(0.95);
}

.coin {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    box-shadow: 
        0 0 60px var(--glow-purple),
        0 0 100px var(--glow-blue),
        inset 0 0 40px rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.coin-shine {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.4) 0%, transparent 60%);
    border-radius: 50%;
    animation: shine 2s ease-in-out infinite;
}

@keyframes shine {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.coin-symbol {
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.coin-button:active .coin {
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); box-shadow: 0 0 80px var(--glow-purple), 0 0 120px var(--glow-blue); }
}

.click-reward {
    margin-top: 20px;
    font-size: 20px;
    font-weight: 600;
    color: var(--success);
    text-shadow: 0 0 20px var(--success);
}

.passive-income {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Shop section */
.shop {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.shop-title {
    font-size: 24px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #9F7AEA, #667EEA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shop-item {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.shop-item:hover {
    background: rgba(107, 70, 193, 0.15);
    transform: translateX(4px);
}

.shop-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.shop-item-icon {
    font-size: 36px;
    filter: drop-shadow(0 0 10px var(--glow-purple));
}

.shop-item-details {
    text-align: left;
}

.shop-item-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.shop-item-description {
    font-size: 12px;
    color: var(--text-secondary);
}

.shop-button {
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    color: white;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(107, 70, 193, 0.4);
}

.shop-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(107, 70, 193, 0.6);
}

.shop-button:active {
    transform: translateY(0px);
}

.shop-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.shop-button-cost {
    white-space: nowrap;
}

/* Upgrades section */
.upgrades-section {
    margin-top: 30px;
}

.upgrades-title {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.upgrades-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.upgrade-item {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.upgrade-item.current {
    border-color: var(--primary-purple);
    background: rgba(107, 70, 193, 0.2);
    box-shadow: 0 0 20px var(--glow-purple);
}

.upgrade-item.completed {
    opacity: 0.6;
}

.upgrade-info {
    flex: 1;
}

.upgrade-level {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-purple);
    margin-bottom: 4px;
}

.upgrade-stats {
    font-size: 12px;
    color: var(--text-secondary);
}

.upgrade-button {
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue));
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    color: white;
    font-weight: 600;
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.upgrade-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.upgrade-button.completed {
    background: var(--success);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.show {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--glass-border);
    border-top-color: var(--primary-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast notifications */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px 24px;
    font-weight: 600;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
    z-index: 999;
    max-width: 90%;
}

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

.toast.success {
    border-color: var(--success);
    color: var(--success);
}

.toast.error {
    border-color: var(--error);
    color: var(--error);
}