:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --error: #ef4444;
    --success: #22c55e;
    --pending: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.2s;
}

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

.user-email {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary);
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: background 0.2s;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-logout {
    color: var(--error) !important;
}

/* Auth Cards */
.auth-card {
    max-width: 400px;
    margin: 4rem auto;
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    border: 1px solid var(--border);
}

.auth-card h1 {
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: 1.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

.btn-submit {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Dashboard */
.dashboard-header {
    margin: 2rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.symbol-selector {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.symbol-selector select {
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 3rem;
    height: 500px;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-error {
    background: #fef2f2;
    color: var(--error);
    border: 1px solid #fee2e2;
}

.alert-success {
    background: #f0fdf4;
    color: var(--success);
    border: 1px solid #dcfce7;
}

/* Footer */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: auto;
}

/* Admin */
.admin-section {
    margin: 2rem 0;
}

.table-wrapper {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f8fafc;
    font-weight: 600;
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.approved { background: #dcfce7; color: var(--success); }
.status-badge.pending { background: #fef3c7; color: var(--pending); }

.btn-approve { background: var(--success); color: white; border: none; padding: 4px 8px; border-radius: 4px; cursor: pointer; }
.btn-reject { background: var(--error); color: white; border: none; padding: 4px 8px; border-radius: 4px; cursor: pointer; }

/* Loading Spinner */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Active Symbols List */
.active-symbols {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.symbol-tag {
    background: #e2e8f0;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.symbol-tag .remove-btn {
    cursor: pointer;
    font-weight: 700;
    color: var(--text-muted);
    transition: color 0.1s;
    border: none;
    background: transparent;
}

.symbol-tag .remove-btn:hover {
    color: var(--error);
}