/* ============================================================
   Design tokens
   ------------------------------------------------------------
   Palette:  warm paper background, ink-dark sidebar "spine",
             deep pine accent (not the generic AI-blue).
   Type:     Source Serif 4 for headings (editorial, planner-like),
             Inter for body copy, IBM Plex Mono for time/data.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,500;8..60,600&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    /* Surfaces */
    --bg: #f7f6f3;
    --panel: #ffffff;
    --sidebar: #15171c;
    --sidebar-hover: #1f222a;

    /* Text */
    --text: #16181d;
    --text-inverse: #eceae4;
    --muted: #74716a;
    --muted-inverse: #8b8e97;

    /* Structure */
    --border: #e5e2da;
    --border-strong: #d3cfc3;

    /* Accent */
    --accent: #1f5c52;
    --accent-hover: #164941;
    --accent-tint: #e8efec;

    /* Status (used as tint + left-bar, not solid fills) */
    --status-confirmed: #1f5c52;
    --status-confirmed-tint: #e8efec;
    --status-busy: #a15c14;
    --status-busy-tint: #f6ede1;
    --status-private: #4b4d57;
    --status-private-tint: #eceae7;
    --status-proposed: #2f5d86;
    --status-proposed-tint: #e6eef6;

    --danger: #ad2b38;

    /* Scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 40px;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(21, 23, 28, 0.06);
    --shadow-md: 0 4px 16px rgba(21, 23, 28, 0.08);

    --ease: cubic-bezier(0.4, 0, 0.2, 1);

    --font-display: "Source Serif 4", Georgia, serif;
    --font-body: Inter, system-ui, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, monospace;

    /* Accessibility */
    --font-scale: 1;
}

.dark {
    --bg: #0e0f12;
    --panel: #17191d;
    --sidebar: #0a0b0d;
    --sidebar-hover: #161821;

    --text: #eceae4;
    --text-inverse: #16181d;
    --muted: #91908a;
    --muted-inverse: #6b6d75;

    --border: #2a2c31;
    --border-strong: #3a3d43;

    --accent: #4fa393;
    --accent-hover: #63b6a5;
    --accent-tint: #16221f;

    --status-confirmed: #4fa393;
    --status-confirmed-tint: #16221f;
    --status-busy: #d1934f;
    --status-busy-tint: #26200f;
    --status-private: #9294a0;
    --status-private-tint: #1c1d21;
    --status-proposed: #6ba2d6;
    --status-proposed-tint: #101c28;

    --danger: #e2707c;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: calc(14px * var(--font-scale));
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

/* ============================================================
   Skip link
   ============================================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 1000;
    background: var(--accent);
    color: #fff;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
}

.skip-link:focus {
    left: var(--space-4);
    top: var(--space-4);
}

/* ============================================================
   Layout
   ============================================================ */

.layout {
    display: grid;
    grid-template-columns: 248px 1fr;
    height: 100vh;
}

.sidebar {
    background: var(--sidebar);
    color: var(--text-inverse);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    padding: var(--space-5) var(--space-4);
    display: flex;
    flex-direction: column;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    padding: 0 var(--space-2);
}

.logo h2 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 19px;
    letter-spacing: -0.01em;
}

nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

nav a {
    cursor: pointer;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--muted-inverse);
    font-size: 13.5px;
    font-weight: 500;
    transition: background 0.15s var(--ease), color 0.15s var(--ease);
}

nav a:hover {
    background: var(--sidebar-hover);
    color: var(--text-inverse);
}

nav .active {
    background: var(--accent);
    color: #ffffff;
}

.sidebar-bottom {
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

button {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    margin-top: var(--space-2);
    transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

button:hover {
    border-color: var(--border-strong);
    background: var(--bg);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* button variants */

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

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

.btn-danger {
    color: var(--danger);
    border-color: var(--danger);
    background: transparent;
}

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

.btn-sm {
    width: auto;
    padding: 6px 12px;
    font-size: 12.5px;
    margin-top: 0;
}

.sidebar button {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--text-inverse);
}

.sidebar button:hover {
    background: var(--sidebar-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Content */

.content {
    padding: var(--space-6) var(--space-7);
    overflow-y: auto;
}

h1 {
    margin-top: 0;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 26px;
    letter-spacing: -0.01em;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-top: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.card h3 {
    margin-top: 0;
    font-family: var(--font-display);
    font-weight: 600;
}

/* forms */

input,
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 13.5px;
    margin-top: var(--space-2);
    transition: border-color 0.15s var(--ease);
}

textarea {
    resize: vertical;
    min-height: 64px;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
}

form {
    display: flex;
    flex-direction: column;
}

.field-label {
    display: block;
    margin-top: var(--space-3);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--muted);
    text-transform: uppercase;
}

.field-row {
    display: flex;
    gap: var(--space-3);
}

.field-row > div {
    flex: 1;
}

.muted {
    color: var(--muted);
}

.error {
    color: var(--danger);
}

.success {
    color: var(--accent);
}

/* list items */

.list-item {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-top: var(--space-2);
    transition: border-color 0.15s var(--ease);
}

.list-item:hover {
    border-color: var(--border-strong);
}

/* badges */

.badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border: 1px solid transparent;
}

.badge-confirmed { background: var(--status-confirmed-tint); color: var(--status-confirmed); }
.badge-busy      { background: var(--status-busy-tint);      color: var(--status-busy); }
.badge-private   { background: var(--status-private-tint);   color: var(--status-private); }
.badge-proposed  { background: var(--status-proposed-tint);  color: var(--status-proposed); }

/* event actions */

.event-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.event-actions button {
    margin-top: 0;
    width: auto;
    padding: 8px 14px;
}

.event-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

/* radio kind picker */

.kind-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.kind-option {
    position: relative;
    display: block;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    cursor: pointer;
    transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.kind-option:hover {
    border-color: var(--border-strong);
}

.kind-option input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
}

.kind-option-title {
    display: block;
    font-weight: 600;
}

.kind-option-desc {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin-top: 2px;
}

.kind-option:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent-tint);
}

/* settings toggles */

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-info {
    max-width: 70%;
}

.setting-title {
    font-weight: 600;
}

.setting-desc {
    font-size: 12.5px;
    color: var(--muted);
    margin-top: 2px;
}

.setting-control {
    flex-shrink: 0;
}

.setting-control select {
    width: auto;
    margin-top: 0;
}

/* switch */

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
}

.switch .slider {
    position: absolute;
    inset: 0;
    background: var(--border-strong);
    border-radius: 999px;
    transition: background 0.15s var(--ease);
}

.switch .slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    top: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.15s var(--ease);
    box-shadow: var(--shadow-sm);
}

.switch input:checked + .slider {
    background: var(--accent);
}

.switch input:checked + .slider::before {
    transform: translateX(20px);
}

.switch input:focus-visible + .slider {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* member list */

.member-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.member-chip {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 12px;
}

/* calendar */

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.calendar-header h3 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 17px;
    text-transform: capitalize;
}

.calendar-nav-btn {
    width: auto;
    padding: 6px 12px;
    margin-top: 0;
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    margin-top: var(--space-4);
    font-size: 12px;
    color: var(--muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    display: inline-block;
}

/* week grid */

.calendar-week {
    display: flex;
    margin-top: var(--space-4);
    overflow-x: auto;
}

.calendar-gutter {
    width: 52px;
    flex-shrink: 0;
    padding-top: 0px;
}

.calendar-hour-label {
    height: 48px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--muted);
    text-align: right;
    padding-right: var(--space-2);
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    transform: translateY(-6px);
}

.calendar-days {
    display: flex;
    flex: 1;
    min-width: 700px;
}

.calendar-day-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border);
}

.calendar-day-header {
    height: 32px;
    text-align: center;
    padding: 6px 0;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--muted);
}

.calendar-day-header.today {
    color: var(--accent);
    font-weight: 600;
}

.calendar-day-track {
    position: relative;
    height: 576px; /* 12 uur zichtbaar x 48px */
    background-image: repeating-linear-gradient(
        to bottom,
        var(--border) 0,
        var(--border) 1px,
        transparent 1px,
        transparent 48px
    );
}

.calendar-event {
    position: absolute;
    left: 4px;
    right: 4px;
    border-radius: var(--radius-sm);
    padding: 4px 8px 4px 9px;
    font-size: 11px;
    color: var(--text);
    cursor: pointer;
    overflow: hidden;
    border-left: 3px solid transparent;
    background: var(--panel);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.15s var(--ease);
}

.calendar-event:hover {
    box-shadow: var(--shadow-md);
}

.calendar-event-time {
    display: block;
    font-family: var(--font-mono);
    font-size: 9.5px;
    color: var(--muted);
}

.calendar-event-title {
    display: block;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.event-confirmed {
    background: var(--status-confirmed-tint);
    border-left-color: var(--status-confirmed);
}

.event-busy {
    background: var(--status-busy-tint);
    border-left-color: var(--status-busy);
}

.event-private {
    background: var(--status-private-tint);
    border-left-color: var(--status-private);
}

.event-proposed {
    background: var(--status-proposed-tint);
    border-left-color: var(--status-proposed);
    border-left-style: dashed;
}

.legend-dot.event-confirmed,
.legend-dot.event-busy,
.legend-dot.event-private,
.legend-dot.event-proposed {
    border-radius: 2px;
    border-left: none;
}

.legend-dot.event-confirmed { background: var(--status-confirmed); }
.legend-dot.event-busy      { background: var(--status-busy); }
.legend-dot.event-private   { background: var(--status-private); }
.legend-dot.event-proposed  { background: var(--status-proposed); }

/* login screen */

.login-screen {
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}

.login-box {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    width: 320px;
    box-shadow: var(--shadow-md);
}

.login-box h2 {
    margin-top: 0;
    margin-bottom: var(--space-5);
    font-family: var(--font-display);
    font-weight: 600;
    text-align: center;
}

/* ============================================================
   Accessibility preference classes (toggled on <body>)
   ============================================================ */

/* High contrast: stronger borders + pure ink/paper text */
body.a11y-contrast {
    --border: #000000;
    --border-strong: #000000;
    --muted: #2a2a2a;
    --text: #000000;
}

body.a11y-contrast.dark {
    --border: #ffffff;
    --border-strong: #ffffff;
    --muted: #d8d8d8;
    --text: #ffffff;
}

body.a11y-contrast .card,
body.a11y-contrast .list-item,
body.a11y-contrast input,
body.a11y-contrast select,
body.a11y-contrast textarea {
    border-width: 2px;
}

/* Underline all links for clarity */
body.a11y-underline a {
    text-decoration: underline;
}

/* Reduce motion */
body.a11y-reduce-motion,
body.a11y-reduce-motion * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
}

/* Dyslexia-friendly reading: readable stack + generous spacing */
body.a11y-dyslexic {
    font-family: "Atkinson Hyperlegible", "Comic Sans MS", Verdana, sans-serif;
    letter-spacing: 0.03em;
    word-spacing: 0.12em;
    line-height: 1.8;
}

body.a11y-dyslexic h1,
body.a11y-dyslexic h2,
body.a11y-dyslexic h3,
body.a11y-dyslexic .card h3 {
    font-family: "Atkinson Hyperlegible", "Comic Sans MS", Verdana, sans-serif;
}

/* Respect the OS-level reduced motion request too */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}