:root {
    --bg: #0f1117;
    --surface: #161922;
    --border: #2a2e3a;
    --text: #e4e4e7;
    --text-dim: #71717a;
    --accent: #f59e0b;
    --accent-dim: rgba(245, 158, 11, 0.12);
    --accent-glow: rgba(245, 158, 11, 0.25);
    --radius: 4px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", monospace
}

body.light {
    --bg: #fafafa;
    --surface: #ffffff;
    --border: #e4e4e7;
    --text: #18181b;
    --text-dim: #71717a;
    --accent: #d97706;
    --accent-dim: rgba(217, 119, 6, 0.08);
    --accent-glow: rgba(217, 119, 6, 0.15);
}

* { box-sizing: border-box; }

html, body {
    min-height: 100vh;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

.main-wrap {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.main-title {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.top-bar {
    margin-bottom: 2rem;
}

.ctrl-btn {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 5px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all 150ms ease;
}
.ctrl-btn:hover {
    color: var(--text);
    border-color: var(--text-dim);
}
.ctrl-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-dim);
    border-color: var(--accent);
}

.username-display {
    color: var(--text-dim);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.time-window-select {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    padding: 6px 12px;
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    width: 100%;
    max-width: 320px;
    transition: border-color 150ms ease;
    text-align: center;
    --bs-body-color: var(--text)
}
.time-window-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
    background-color: var(--bg)
}
.time-window-select:hover {
   border-color: var(--accent);
}

.date-picking-preset-btn-calendar {
    background: var(--surface);
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    margin: 2px;
    transition: all 150ms ease;
    --text-dim: var(--text)
}
.date-picking-preset-btn-calendar:hover {
    color: var(--accent);
    border-color: var(--accent);
}
.date-picking-preset-btn-wrapper {
    padding: 6px 8px;
}

.section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    height: 100%;
    transition: border-color 200ms ease;
}
.section:hover {
    border-color: var(--text-dim);
}

.section h2 {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
    margin-top: 0;
}

.section p {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin: 0;
}

.section dl {
    margin: 0;
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 1rem;
    row-gap: 0.6rem;
    align-items: baseline;
}

.section dt {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--text-dim);
    text-align: right;
    white-space: nowrap;
}
.section dt::after {
    content: "";
}

.section dd {
    margin: 0;
    padding: 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.info-icon {
    display: inline-block;
    font-size: 0.7em;
    vertical-align: super;
    margin-left: 0.3em;
    cursor: pointer;
    color: var(--text-dim);
    transition: color 150ms ease;
}
.info-icon:hover { color: var(--accent); }

.info-tooltip {
    position: fixed;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    font-size: 0.8rem;
    font-family: var(--font-sans);
    display: none;
    z-index: 1001;
    max-width: 260px;
    line-height: 1.5;
}
.info-tooltip.visible {
    display: block;
    animation: tooltipIn 120ms ease-out;
}

@keyframes tooltipIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
    position: relative;
    z-index: 1;
}

.login-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 340px;
}

.login-form h1 {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: border-color 150ms ease, box-shadow 150ms ease;
}
.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.login-button {
    width: 100%;
    padding: 10px;
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: opacity 150ms ease;
}
.login-button:hover { opacity: 0.9; }
.login-button:active { opacity: 0.8; }

.error-message {
    color: #f87171;
    font-size: 0.8rem;
    margin-top: 0.75rem;
    text-align: center;
}

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    padding: 1rem;
}
.modal.hidden { display: none; }
.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}
.modal-content {
    position: relative;
    width: 100%;
    max-width: 560px;
    max-height: 80vh;
    overflow-y: auto;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    z-index: 1000;
}
.modal-content h2 {
    margin-top: 0;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    text-align: center;
}
.modal-content p, .modal-content ul {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.7;
}
.modal-content ul { padding-left: 1.2rem; }
.modal-close {
    position: absolute;
    right: 12px;
    top: 12px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-size: 1.4rem;
    cursor: pointer;
    line-height: 1;
    transition: color 150ms ease;
}
.modal-close:hover { color: var(--text); }

@media (max-width: 768px) {
    .main-wrap { padding: 1rem; }
    .main-title { font-size: 0.7rem; margin-bottom: 1.5rem; }
    .section { padding: 1rem; }
    .section dl {
        grid-template-columns: 1fr;
        row-gap: 0.2rem;
    }
    .section dt { text-align: left; }
    .time-window-select { max-width: 100%; }
}