/* ==================== VARIABLES ==================== */
:root {
    --bg-primary: #0B0E11;
    --bg-secondary: #161A1E;
    --bg-tertiary: #1E2329;
    --text-primary: #EAECEF;
    --text-secondary: #848E9C;
    --accent-green: #0ECB81;
    --accent-red: #F6465D;
    --accent-yellow: #F0B90B;
    --border-color: #2B3139;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding-bottom: 80px;
}

/* ==================== HEADER ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-green);
}

.refresh-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s;
}

.refresh-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ==================== NAVIGATION ==================== */
.nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
    z-index: 100;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    transition: all 0.3s;
}

.nav-btn.active {
    color: var(--accent-yellow);
}

.nav-icon {
    width: 24px;
    height: 24px;
}

.nav-text {
    font-size: 12px;
}

/* ==================== CONTENT ==================== */
.content {
    margin-top: 72px;
    padding: 16px;
}

.tab-content {
    display: none;
}

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

/* ==================== CARDS ==================== */
.card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

/* ==================== AI STATUS ==================== */
.ai-status-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.ai-status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #848E9C;
}

.status-text {
    font-size: 16px;
    font-weight: 600;
}

.ai-status-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ==================== TOGGLE BUTTON (iOS STYLE) ==================== */
.toggle-btn {
    width: 51px;
    height: 31px;
    background: #E5E5EA;
    border-radius: 16px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.3s ease;
    border: none;
    padding: 0;
}

.toggle-btn.active {
    background: #34C759;
}

.toggle-slider {
    width: 27px;
    height: 27px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-btn.active .toggle-slider {
    transform: translateX(20px);
}

/* ==================== BALANCE CARDS ==================== */
.balance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.balance-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.balance-card-highlight {
    border-color: var(--accent-yellow);
}

.balance-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.balance-value {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

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

.balance-change.profit {
    color: var(--accent-green);
}

.balance-change.loss {
    color: var(--accent-red);
}

/* ==================== CHART ==================== */
.chart-container {
    position: relative;
    height: 200px;
}

.chart-period-btns {
    display: flex;
    gap: 8px;
}

.period-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.period-btn.active {
    background: var(--accent-yellow);
    border-color: var(--accent-yellow);
    color: var(--bg-primary);
}

/* ==================== STATS GRID ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-icon {
    font-size: 24px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 18px;
    font-weight: 600;
}

/* ==================== POSITION CARD ==================== */
.position-card,
.signal-card,
.history-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}

.position-header,
.signal-header,
.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.position-symbol,
.signal-symbol,
.history-symbol {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
}

.coin-icon {
    font-size: 20px;
}

.position-pnl,
.history-pnl {
    font-size: 14px;
    font-weight: 600;
}

.position-pnl.profit,
.history-pnl.profit {
    color: var(--accent-green);
}

.position-pnl.loss,
.history-pnl.loss {
    color: var(--accent-red);
}

.position-details,
.signal-details,
.history-details {
    margin-bottom: 12px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

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

.detail-value {
    font-size: 12px;
    font-weight: 600;
}

.detail-value.profit {
    color: var(--accent-green);
}

.detail-value.loss {
    color: var(--accent-red);
}

/* ==================== BUTTONS ==================== */
.btn {
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

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

.btn-primary:hover {
    background: #0db574;
}

.btn-danger {
    background: var(--accent-red);
    color: white;
}

.btn-danger:hover {
    background: #e0405b;
}

.position-actions,
.signal-actions {
    display: flex;
    gap: 8px;
}

/* ==================== SIGNAL BADGES ==================== */
.signal-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.signal-card.signal-buy {
    border-color: var(--accent-green);
}

.signal-card.signal-buy .signal-badge {
    background: rgba(14, 203, 129, 0.2);
    color: var(--accent-green);
}

.signal-card.signal-sell {
    border-color: var(--accent-red);
}

.signal-card.signal-sell .signal-badge {
    background: rgba(246, 70, 93, 0.2);
    color: var(--accent-red);
}

.signal-card.signal-hold {
    border-color: var(--accent-yellow);
}

.signal-card.signal-hold .signal-badge {
    background: rgba(240, 185, 11, 0.2);
    color: var(--accent-yellow);
}

/* ==================== EMPTY STATE ==================== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.empty-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ==================== ANIMATIONS ==================== */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.refresh-btn:active {
    animation: spin 0.5s ease;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 480px) {
    .balance-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}