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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252542;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #2a2a4a;
}

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

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Login */
.login-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 1rem;
    padding-top: 12vh;
}

.login-box {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.login-box h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-box .subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.login-box form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-box input {
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
}

.login-box input:focus {
    outline: none;
    border-color: var(--accent);
}

.login-box button {
    padding: 0.875rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.login-box button:hover {
    background: var(--accent-hover);
}

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

.login-box .error {
    color: var(--danger);
    font-size: 0.875rem;
    text-align: center;
}

/* Dashboard */
.dashboard {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    gap: 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

nav button {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
}

nav button:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

nav button.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

.user-info span {
    color: var(--text-secondary);
}

.user-info button {
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
}

.user-info button:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.user-info .refresh-btn {
    font-size: 1.25rem;
    padding: 0.25rem 0.5rem;
    line-height: 1;
}

.user-info .refresh-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.stat .value {
    font-size: 1.5rem;
    font-weight: 600;
}

.stat .value.profit {
    color: var(--success);
}

/* Main Content */
main {
    flex: 1;
    padding: 1.5rem;
}

.tab-content {
    max-width: 1400px;
    margin: 0 auto;
}

.tab-content h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.empty {
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 2rem;
}

thead {
    background: var(--bg-tertiary);
}

th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
}

td {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
}

tr:hover {
    background: var(--bg-tertiary);
}

tr.viable {
    border-left: 3px solid var(--success);
}

tr.profit td {
    background: rgba(16, 185, 129, 0.1);
}

tr.loss td {
    background: rgba(239, 68, 68, 0.1);
}

.profit {
    color: var(--success);
}

.loss {
    color: var(--danger);
}

.spread {
    color: var(--warning);
    font-weight: 600;
}

.address {
    font-family: monospace;
    font-size: 0.8rem;
}

/* Status Badges */
.status {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status.detected { background: rgba(99, 102, 241, 0.2); color: var(--accent); }
.status.executing { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.status.executed, .status.completed { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.status.expired, .status.failed { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
.status.pending { background: rgba(160, 160, 176, 0.2); color: var(--text-secondary); }
.status.buy_confirmed, .status.sell_confirmed { background: rgba(99, 102, 241, 0.2); color: var(--accent); }
.status.active { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.status.inactive { background: rgba(160, 160, 176, 0.2); color: var(--text-secondary); }

/* Settings */
.settings .setting-group {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}

.settings .setting-group h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.settings .setting {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.settings .setting:last-child {
    border-bottom: none;
}

.settings .setting label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    min-width: 150px;
}

.settings .setting input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--accent);
}

.settings .setting input[type="number"] {
    padding: 0.5rem;
    width: 100px;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.settings .setting select {
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    min-width: 180px;
}

.settings .setting select:focus {
    outline: none;
    border-color: var(--accent);
}

.settings .setting select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.settings .setting .hint {
    color: var(--text-secondary);
    font-size: 0.8rem;
    flex: 1;
}

.settings .info {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-wrap: wrap;
    }

    nav {
        display: none;
    }

    .mobile-nav {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        padding: 0.75rem 1rem;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border);
    }

    .mobile-nav button {
        padding: 0.75rem;
        background: var(--bg-tertiary);
        color: var(--text-secondary);
        border: 1px solid var(--border);
        border-radius: 0.5rem;
        font-size: 0.875rem;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.2s;
    }

    .mobile-nav button:hover,
    .mobile-nav button.active {
        background: var(--accent);
        color: white;
        border-color: var(--accent);
    }

    .stats-bar {
        grid-template-columns: repeat(3, 1fr);
    }

    table {
        display: block;
        overflow-x: auto;
    }
}