:root {
    --bg-color: #0f172a;
    --bg-gradient: radial-gradient(circle at 15% 50%, rgba(76, 29, 149, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(14, 165, 233, 0.15), transparent 25%);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --danger-color: #ef4444;
    --success-color: #10b981;
    --font-family: 'Outfit', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 2rem;
    line-height: 1.6;
}

.background-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.app-container {
    width: 100%;
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 1rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header .accent {
    color: var(--accent-color);
    -webkit-text-fill-color: var(--accent-color);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Glass Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Global Settings */
.global-settings {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.input-group label {
    font-weight: 500;
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

input[type="number"],
input[type="text"] {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
    width: 100%;
}

input[type="number"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.unit {
    position: absolute;
    right: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    pointer-events: none;
}

.info-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 999px;
}

/* Tasks Section */
.tasks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.tasks-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-primary {
    background: var(--accent-color);
    color: #0f172a;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* Table */
.table-responsive {
    overflow-x: auto;
    padding: 0;
    /* Override glass-panel padding for table */
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th {
    text-align: left;
    padding: 1.25rem 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--glass-border);
}

.th-sub {
    font-size: 0.75rem;
    opacity: 0.7;
    font-weight: 400;
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    vertical-align: middle;
}

tr:last-child td {
    border-bottom: none;
}

.text-right {
    text-align: right;
}

.action-col {
    width: 60px;
    text-align: center;
}

.btn-delete {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-delete:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Empty State */
.empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Footer Summary */
.summary-panel {
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9));
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.summary-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

.summary-item .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-item .value {
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.summary-item.highlight .value {
    color: var(--accent-color);
    text-shadow: 0 0 20px var(--accent-glow);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.task-row {
    animation: fadeIn 0.3s ease-out forwards;
}

/* Responsive */
@media (max-width: 640px) {
    .global-settings {
        flex-direction: column;
        align-items: stretch;
    }

    .summary-panel {
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem;
    }

    .summary-divider {
        width: 100%;
        height: 1px;
    }
}