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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

html[data-theme="dark"] {
    --primary: #818cf8;
    --primary-dark: #6366f1;
    --secondary: #a78bfa;
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --text-primary: #f3f4f6;
    --text-secondary: #d1d5db;
    --border-color: #374151;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Auth Section */
.auth-section {
    display: none;
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.auth-section.active {
    display: flex;
}

.auth-container {
    max-width: 400px;
    width: 90%;
}

.auth-card {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.auth-logo {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.auth-card h2 {
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.auth-toggle {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-weight: 600;
    text-decoration: underline;
    font-size: 0.95rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.btn-icon:hover {
    background-color: var(--bg-tertiary);
}

/* App Section */
.app-section {
    display: none;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-section.active {
    display: flex;
}

/* Header */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 100%;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#sidebar-toggle {
    display: none;
}

@media (max-width: 768px) {
    #sidebar-toggle {
        display: inline-flex;
    }
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu {
    position: relative;
}

.user-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.user-btn:hover {
    background-color: var(--bg-secondary);
}

.user-email {
    font-size: 0.9rem;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    flex-direction: column;
    z-index: 1000;
    margin-top: 0.5rem;
}

.dropdown-menu.active {
    display: flex;
}

.dropdown-item {
    padding: 0.75rem 1.25rem;
    border: none;
    background: none;
    color: var(--text-primary);
    text-align: right;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-item:hover {
    background-color: var(--bg-secondary);
    color: var(--primary);
}

.btn-logout {
    color: var(--danger);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 60px;
    width: 250px;
    height: calc(100vh - 60px);
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    z-index: 50;
    transition: transform 0.3s;
}

.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 40;
}

.sidebar-backdrop.active {
    display: block;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.active {
        transform: translateX(0);
    }
}

.nav-list {
    list-style: none;
    padding: 1rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border-right: 3px solid transparent;
}

.nav-link:hover {
    color: var(--primary);
    background-color: var(--bg-secondary);
}

.nav-link.active {
    color: var(--primary);
    background-color: rgba(99, 102, 241, 0.1);
    border-right-color: var(--primary);
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    margin-right: 250px;
}

@media (max-width: 768px) {
    .main-content {
        margin-right: 0;
    }
}

/* Pages */
.page {
    display: none;
    animation: fadeIn 0.3s;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 700;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.2s;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    width: 60px;
    height: 60px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Content Cards */
.content-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.content-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Balance Cards */
.balance-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.balance-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.2s;
}

.balance-card:hover {
    box-shadow: var(--shadow-md);
}

.balance-card.highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
}

.balance-card h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.balance-amount {
    font-size: 1.75rem;
    font-weight: 700;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

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

thead {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
}

th {
    padding: 1rem;
    text-align: right;
    font-weight: 600;
    color: var(--text-secondary);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

/* Trades List */
.trades-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.trade-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.trade-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.trade-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.trade-symbol {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.trade-type {
    font-size: 0.85rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
}

.trade-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.trade-item {
    font-size: 0.9rem;
}

.trade-item-label {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.trade-item-value {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.trade-profit {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
}

.trade-profit.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.trade-profit.negative {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* Calendar */
.calendar-widget {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.btn-nav {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-nav:hover {
    background: var(--bg-secondary);
}

.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.calendar-day:hover:not(.disabled) {
    background: var(--bg-secondary);
}

.calendar-day.selected {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.calendar-day.today {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.calendar-day.disabled {
    color: var(--text-secondary);
    cursor: not-allowed;
}

/* Analytics Grid */
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.analytics-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    text-align: center;
}

.analytics-card h3 {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.big-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

/* Settings */
.settings-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.settings-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.settings-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
}

.settings-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.settings-card form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
}

.modal-lg {
    max-width: 700px;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
}

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

.modal-content form {
    padding: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    padding-top: 1rem;
}

.commission-note {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 1rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .settings-container {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .main-content {
        padding: 1rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .stats-grid,
    .balance-cards,
    .analytics-grid {
        grid-template-columns: 1fr;
    }

    .trades-list {
        grid-template-columns: 1fr;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.75rem;
    }
}

/* Utilities */
.hidden { display: none; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }