:root {
    --bg-main: #0F1117;
    --card-bg: #161B27;
    --grid: #2A3145;
    --text-main: #E8EAF0;
    --text-muted: #8B93A7;
    --therap: rgba(168, 216, 168, 0.12);
    --therap-border: rgba(168, 216, 168, 0.5);

    --primary: #4A90D9;
    --primary-hover: #3b7dc2;
    --secondary: #50BFA5;
    --secondary-hover: #3f9c85;
    --danger: #E05C5C;
    --danger-hover: #c94b4b;

    --radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
}

.app-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    margin-bottom: 2rem;
    text-align: center;
}

header h1 {
    font-size: 2.25rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    align-items: start;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--grid);
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--grid);
    padding-bottom: 0.5rem;
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.w-full { width: 100%; }

/* Advanced Settings (De-emphasized) */
.settings-card {
    background: transparent;
    border: 1px dashed var(--grid);
    box-shadow: none;
}

.settings-card h2 {
    font-size: 1.05rem;
    color: var(--text-muted);
    border-bottom: 1px dashed var(--grid);
    margin-bottom: 0.75rem;
}

/* Tables & Forms */
.param-table {
    width: 100%;
    border-collapse: collapse;
}

.param-table td {
    padding: 0.25rem 0;
}

.param-table td:first-child {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-muted);
}

input, select {
    width: 100%;
    padding: 0.5rem;
    background-color: var(--bg-main);
    border: 1px solid var(--grid);
    color: var(--text-main);
    border-radius: 4px;
    font-size: 0.9rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
}

.data-table th, .data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--grid);
}

.data-table th {
    color: var(--text-muted);
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.02);
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, opacity 0.2s;
    text-align: center;
}

.btn:active {
    opacity: 0.8;
}

.btn.primary {
    background-color: var(--primary);
    color: #fff;
    width: 100%;
}

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

.btn.secondary {
    background-color: var(--secondary);
    color: #fff;
    width: 100%;
}

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

.btn.danger {
    background-color: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    width: auto;
}

.btn.danger:hover {
    background-color: var(--danger);
    color: #fff;
}

/* Regimens List */
.regimen-item {
    padding: 1rem;
    background-color: var(--bg-main);
    border: 1px solid var(--grid);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    position: relative;
    overflow: hidden;
}

.regimen-item.hidden-regimen {
    opacity: 0.5;
}

.regimen-color-indicator {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 6px;
    transition: background-color 0.2s;
}

.regimen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.regimen-name-input {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-main);
    font-size: 1rem;
    font-weight: bold;
    width: 100%;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    transition: border-color 0.2s, background-color 0.2s;
}

.regimen-name-input:hover, .regimen-name-input:focus {
    border-color: var(--primary);
    background-color: var(--bg-main);
    outline: none;
}

.regimen-actions {
    display: flex;
    gap: 0.5rem;
}

.regimen-details {
    padding-left: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.regimen-details div {
    margin-bottom: 0.25rem;
}

/* Chart Area */
.chart-container {
    position: relative;
    height: 500px;
    width: 100%;
    margin-bottom: 1.5rem;
}

.info-card {
    font-size: 0.9rem;
    color: var(--text-muted);
    border: 1px dashed var(--grid);
    background: transparent;
    box-shadow: none;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.hidden {
    display: none;
}

.modal {
    background: var(--card-bg);
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius);
    border: 1px solid var(--grid);
    box-shadow: 0 10px 25px rgba(0,0,0,0.8);
    display: flex;
    flex-direction: column;
}

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

.modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
}

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

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

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--grid);
}

.add-dose-box {
    background: var(--bg-main);
    padding: 1rem;
    border-radius: 6px;
    border: 1px dashed var(--grid);
    margin-top: 1rem;
}

.modal-dose-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--grid);
}
.modal-dose-item:last-child {
    border-bottom: none;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}