:root {
    /* Main Palette - Light Mode */
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --sidebar-bg: #1e293b;
    --sidebar-text: #f8fafc;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Main Palette - Dark Mode */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #60a5fa;
    --sidebar-bg: #0b0f19;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Typography elements */
h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.25rem; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
p { color: var(--text-secondary); font-size: 0.9rem; }

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    transition: all 0.3s ease;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #fff;
}

.logo-icon {
    color: var(--accent-blue);
    width: 28px;
    height: 28px;
}

.nav-links {
    list-style: none;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-links li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #cbd5e1;
}

.nav-links li:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: #fff;
    transform: translateX(4px);
}

.nav-links li.active {
    background-color: var(--accent-blue);
    color: #fff;
    font-weight: 500;
}

.nav-links li.highlight-nav {
    border: 1px solid rgba(255,255,255,0.1);
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    position: relative;
    overflow: hidden;
}

.nav-links li.highlight-nav::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    to { left: 150%; }
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name { font-size: 0.9rem; font-weight: 500; color: #fff;}
.user-role { font-size: 0.75rem; color: #94a3b8; }

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    position: relative;
}

/* Header */
.top-header {
    height: 70px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 5;
}

.header-search {
    display: flex;
    align-items: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    padding: 0.5rem 1rem;
    width: 300px;
    transition: all 0.3s ease;
}

.header-search:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.header-search i {
    color: var(--text-secondary);
    width: 18px;
    height: 18px;
}

.header-search input {
    border: none;
    background: transparent;
    outline: none;
    padding-left: 0.75rem;
    width: 100%;
    color: var(--text-primary);
    font-family: inherit;
}

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

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s ease;
    position: relative;
}

.icon-btn:hover {
    background-color: var(--bg-secondary);
    transform: translateY(-2px);
}

.notification-btn .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background-color: var(--accent-red);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-secondary);
}

/* Views */
.view-container {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.view {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.view.active-view {
    display: block;
}

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

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

/* Glass Panels */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.metric-icon {
    width: 54px;
    height: 54px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.blue-bg { background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%); }
.purple-bg { background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%); }
.green-bg { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }

.metric-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

/* Task List Widget */
.widget {
    padding: 1.5rem;
}

.widget h3 {
    margin-bottom: 1.25rem;
}

.task-list {
    list-style: none;
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.task-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.task-item.urgent { border-left: 3px solid var(--accent-red); padding-left: 1rem; }
.task-item.warning { border-left: 3px solid #f59e0b; padding-left: 1rem; }

/* Buttons */
.primary-btn {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 0.65rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.primary-btn:hover {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
}

.secondary-btn {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.65rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

/* Crypto Dashboard Overrides */
.crypto-dashboard {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    padding: 2rem;
}

.crypto-balance {
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-right: 1px solid var(--border-color);
    padding-right: 2rem;
}

.crypto-balance h2 {
    font-size: 2.25rem;
    color: var(--text-primary);
    margin: 0.5rem 0;
}

.crypto-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.crypto-payees {
    padding-left: 1rem;
}

.payee-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.payee-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: transform 0.2s ease;
}

.payee-item:hover {
    transform: translateX(4px);
    border-color: var(--accent-blue);
}

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

.payee-info p {
    font-size: 0.75rem;
    font-family: monospace;
    background: var(--bg-primary);
    padding: 0.1rem 0.4rem;
    border-radius: 0.25rem;
    margin-top: 0.2rem;
}

.pay-btn {
    background: transparent;
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pay-btn:hover {
    background: var(--accent-blue);
    color: white;
}

.batch-pay-container {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
}

.bulk-pay-btn {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    border: none;
}

@media (max-width: 900px) {
    .crypto-dashboard {
        grid-template-columns: 1fr;
    }
    .crypto-balance {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: 2rem;
    }
    .crypto-payees {
        padding-left: 0;
    }
}