:root {
    --bg-page-start: #e0eafc;
    --bg-page-end: #cfdef3;
    --bg-card: rgba(255, 255, 255, 0.6);
    --border-color: rgba(255, 255, 255, 0.3);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --brand-primary: #10b981; /* Modern Green */
    --brand-primary-light: #d1fae5;
    --brand-secondary: #3b82f6; /* Modern Blue */
    --hover-bg: rgba(255, 255, 255, 0.8);
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --shadow-sm: 0 4px 16px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 30px -5px rgba(0,0,0,0.1);
    --glass-blur: blur(12px);
}

body.dark-mode {
    --bg-page-start: #09090b;
    --bg-page-end: #000000;
    --bg-card: rgba(24, 24, 27, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: #fafafa;
    --text-muted: #a1a1aa;
    --hover-bg: rgba(255, 255, 255, 0.05);
    --brand-primary: #10b981;
    --brand-secondary: #0ea5e9;
    --shadow-sm: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-md: 0 20px 40px rgba(0,0,0,0.8);
}

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

/* Remove number input spinners */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

body {
    font-family: var(--font-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    background-color: var(--bg-page-start);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, var(--bg-page-start) 0%, var(--bg-page-end) 100%);
}

.app-container {
    max-width: 1600px;
    width: 100%;
    padding: 0 1rem;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glassmorphism Utilities */
.glass {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
}

/* Top Navigation */
.top-nav {
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 1rem;
    z-index: 100;
    border-radius: var(--radius-lg);
    margin: 1rem 1rem 0;
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-main);
}

.nav-brand i {
    font-size: 2rem;
    color: var(--brand-primary);
    filter: drop-shadow(0 2px 4px rgba(16, 185, 129, 0.3));
}

.nav-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

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

.actions {
    display: flex;
    gap: 0.75rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
    backdrop-filter: var(--glass-blur);
}

.btn-outline:hover {
    background: var(--hover-bg);
    color: var(--brand-secondary);
    transform: translateY(-2px) scale(1.05);
}

.btn-outline:active {
    transform: translateY(0) scale(0.95);
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-secondary), #2563eb);
    color: white;
    border: none;
    height: 42px;
    padding: 0 1.25rem;
    border-radius: 21px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

/* Main Content */
.content {
    flex: 1;
    padding: 2rem 1rem;
}

/* Dashboard Header */
.dashboard-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
    position: relative;
}

/* Global Stats Dashboard */
.global-stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin: 0 auto 3rem auto;
    max-width: 1100px;
}

.global-stat-card {
    padding: 1.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: var(--transition);
}

.global-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.global-stat-card i {
    font-size: 2.2rem;
    color: var(--brand-secondary);
    background: rgba(14, 165, 233, 0.1);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
}

.global-stat-card.highlight i {
    color: var(--brand-primary);
    background: rgba(16, 185, 129, 0.1);
}

.g-stat-info {
    display: flex;
    flex-direction: column;
}

.g-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.g-stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-main);
}

.g-stat-value.positive {
    color: var(--brand-primary);
}

.date-controls {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.date-controls h2 {
    font-size: 1.3rem;
    font-weight: 600;
    min-width: 180px;
    text-align: center;
    color: var(--brand-secondary);
}

.icon-btn {
    background: transparent;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-muted);
    font-size: 1.2rem;
}

.icon-btn:hover {
    background: var(--hover-bg);
    color: var(--text-main);
    transform: scale(1.1);
}

.icon-btn:active {
    transform: scale(0.9);
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--brand-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-text:hover {
    background: rgba(59, 130, 246, 0.1);
}

/* Accounts Grid */
.accounts-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
    margin: 0 auto;
    max-width: 1400px;
    justify-content: center;
}

.account-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.account-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-secondary), var(--brand-primary));
    opacity: 0;
    transition: var(--transition);
}

.account-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.account-card:hover::before {
    opacity: 1;
}

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

.acc-header-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.acc-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.acc-header i {
    color: var(--brand-secondary);
    font-size: 1.6rem;
    background: rgba(59, 130, 246, 0.1);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

.acc-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-history {
    color: var(--brand-secondary);
}

.btn-history:hover, .delete-acc:hover {
    background: transparent;
}

.delete-acc:hover {
    color: #ef4444;
}

.acc-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group-large {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.input-group-large label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.total-points-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid transparent;
    color: var(--text-main);
    font-family: inherit;
    font-weight: 700;
    font-size: 1.8rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.dark-mode .total-points-input {
    background: rgba(0, 0, 0, 0.2);
}

.total-points-input:focus {
    border-color: var(--brand-secondary);
    outline: none;
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.acc-stats {
    display: flex;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.3);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.dark-mode .acc-stats {
    background: rgba(0, 0, 0, 0.15);
}

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

.acc-stats .stat.highlight {
    align-items: flex-end;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
}

.prev-points-input {
    width: 90px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0.25rem;
    transition: var(--transition);
    border-radius: 4px;
}

.prev-points-input:hover, .prev-points-input:focus {
    background: var(--hover-bg);
    outline: none;
    color: var(--text-main);
}

.stat-value.positive {
    color: var(--brand-primary);
}

.stat-value.negative {
    color: #ef4444;
}

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-align: center;
    gap: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.empty-state i {
    font-size: 4rem;
    color: var(--brand-secondary);
    opacity: 0.5;
}

/* History Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    visibility: visible;
    transition: all 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.modal-content {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius-md);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    max-height: 80vh;
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.95);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-header h2 i {
    color: var(--brand-secondary);
}

.modal-body {
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

.table-container {
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.2);
}

.dark-mode .table-container {
    background: rgba(0, 0, 0, 0.2);
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.history-table th, .history-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    background: rgba(0,0,0,0.03);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.dark-mode .history-table th {
    background: rgba(255,255,255,0.03);
}

.history-table tbody tr:last-child td {
    border-bottom: none;
}

.history-table tbody tr:hover {
    background: var(--hover-bg);
}

.history-table td {
    font-weight: 500;
}

.history-table .val-positive {
    color: var(--brand-primary);
    font-weight: 700;
}

.history-table .val-negative {
    color: #ef4444;
    font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
    .top-nav {
        margin: 0;
        border-radius: 0;
        flex-direction: column;
        gap: 1rem;
        position: static;
    }
    .actions {
        flex-wrap: wrap;
        justify-content: center;
    }
    .dashboard-header {
        flex-direction: column;
        gap: 1.5rem;
    }
    .btn-text {
        position: static;
    }
    .content {
        padding: 1rem;
    }
    .modal-content {
        width: 95%;
    }
    .accounts-container {
        grid-template-columns: 1fr;
    }
    .date-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.account-card, .global-stat-card {
    opacity: 0;
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}