/*
 * Don's Driving School — shared Material 3 design tokens.
 * Colors follow the school website (2.2.3): neutral surfaces with the brand brown as the accent.
 * Every plugin screen reads these,
 * so a brand change is one edit here.
 *
 * 2.2.0: Material 3 Expressive (m3.material.io). Extended shape scale, spring motion, emphasized type,
 * shape-morphing buttons, connected button groups, segmented lists, and the loading indicator.
 * Everything new is at the bottom of this file, so older rules above stay as the fallback.
 */
:root {
    /* Color roles: the school website's palette. White and light-gray surfaces, near-black text,
       neutral containers, and the brand brown as the accent (links, selected states, Today).
       Success, caution, and error keep their colors because they carry meaning. */
    --dds-primary: #8B4513;
    --dds-on-primary: #ffffff;
    --dds-primary-container: #efefef;
    --dds-on-primary-container: #111111;
    --dds-secondary: #5c5c5c;
    --dds-secondary-container: #e8e8e8;
    --dds-on-secondary-container: #111111;
    --dds-ink: #111111;              /* main buttons, like the website's black pills */
    --dds-on-ink: #ffffff;
    --dds-error: #ba1a1a;
    --dds-on-error: #ffffff;
    --dds-error-container: #ffdad6;
    --dds-on-error-container: #93000a;
    --dds-success: #3b6a00;
    --dds-success-container: #d7f5b0;
    --dds-on-success-container: #112000;
    --dds-caution: #6f5d00;
    --dds-caution-container: #ffe98f;
    --dds-on-caution-container: #221b00;
    --dds-surface: #f4f4f4;
    --dds-on-surface: #111111;
    --dds-on-surface-variant: #5c5c5c;
    --dds-surface-container-lowest: #ffffff;
    --dds-surface-container-low: #f7f7f7;
    --dds-surface-container: #efefef;
    --dds-surface-container-high: #e8e8e8;
    --dds-surface-container-highest: #e0e0e0;
    --dds-outline: #8a8a8a;
    --dds-outline-variant: #dcdcdc;
    --dds-inverse-surface: #1a1a1a;
    --dds-inverse-on-surface: #f4f4f4;

    /* Shape scale */
    --dds-shape-xs: 4px;
    --dds-shape-sm: 8px;
    --dds-shape-md: 12px;
    --dds-shape-lg: 16px;
    --dds-shape-xl: 28px;
    --dds-shape-full: 999px;

    /* Elevation (M3 levels 1–3) */
    --dds-elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
    --dds-elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);
    --dds-elev-3: 0 1px 3px rgba(0,0,0,.30), 0 4px 8px 3px rgba(0,0,0,.15);

    /* State layer opacities */
    --dds-state-hover: .08;
    --dds-state-focus: .12;
    --dds-state-pressed: .12;

    /* Motion */
    --dds-ease: cubic-bezier(.2, 0, 0, 1);
    --dds-dur-short: 150ms;
    --dds-dur-medium: 250ms;
}

/* ── Type scale (uses the site's font) ── */
.dds-display-sm  { font-size: 36px; line-height: 44px; font-weight: 400; }
.dds-headline-sm { font-size: 24px; line-height: 32px; font-weight: 400; }
.dds-title-lg    { font-size: 22px; line-height: 28px; font-weight: 500; }
.dds-title-md    { font-size: 16px; line-height: 24px; font-weight: 600; letter-spacing: .15px; }
.dds-title-sm    { font-size: 14px; line-height: 20px; font-weight: 600; letter-spacing: .1px; }
.dds-body-lg     { font-size: 16px; line-height: 24px; letter-spacing: .5px; }
.dds-body-md     { font-size: 14px; line-height: 20px; letter-spacing: .25px; }
.dds-body-sm     { font-size: 13px; line-height: 18px; letter-spacing: .4px; }
.dds-label-lg    { font-size: 14px; line-height: 20px; font-weight: 600; letter-spacing: .1px; }
.dds-label-md    { font-size: 13px; line-height: 18px; font-weight: 600; letter-spacing: .5px; }

/* ── Buttons (M3 common buttons) ── */
.dds-m3-btn {
    position: relative; overflow: hidden;
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 40px; padding: 0 24px;
    border-radius: var(--dds-shape-full); border: 1px solid transparent;
    font: inherit; font-size: 14px; font-weight: 600; letter-spacing: .1px; line-height: 20px;
    text-decoration: none !important; cursor: pointer;
    transition: box-shadow var(--dds-dur-short) var(--dds-ease), background-color var(--dds-dur-short) var(--dds-ease);
}
.dds-m3-btn::before { content: ''; position: absolute; inset: 0; background: currentColor; opacity: 0; transition: opacity var(--dds-dur-short) var(--dds-ease); pointer-events: none; }
.dds-m3-btn:hover::before { opacity: var(--dds-state-hover); }
.dds-m3-btn:focus-visible { outline: 3px solid var(--dds-primary); outline-offset: 2px; }
.dds-m3-btn:active::before { opacity: var(--dds-state-pressed); }
.dds-m3-btn:disabled, .dds-m3-btn[aria-disabled="true"] { cursor: not-allowed; box-shadow: none !important; background: rgba(17,17,17,.12) !important; color: rgba(17,17,17,.38) !important; border-color: transparent !important; }
.dds-m3-btn:disabled::before { display: none; }
.dds-m3-btn--filled   { background: var(--dds-ink); color: var(--dds-on-ink) !important; }
.dds-m3-btn--filled:hover:not(:disabled) { box-shadow: var(--dds-elev-1); }
.dds-m3-btn--tonal    { background: var(--dds-secondary-container); color: var(--dds-on-secondary-container) !important; }
.dds-m3-btn--outlined { background: transparent; border-color: var(--dds-outline); color: var(--dds-primary) !important; }
.dds-m3-btn--text     { background: transparent; color: var(--dds-primary) !important; padding: 0 12px; }
.dds-m3-btn--large    { min-height: 56px; font-size: 16px; padding: 0 28px; }
.dds-m3-btn--block    { width: 100%; }
.dds-m3-btn i         { font-size: 18px; }

/* ── Assist chip (links like "Add to calendar") ── */
.dds-m3-chip {
    position: relative; overflow: hidden;
    display: inline-flex; align-items: center; gap: 8px;
    height: 32px; padding: 0 16px 0 8px;
    border: 1px solid var(--dds-outline-variant); border-radius: var(--dds-shape-sm);
    background: var(--dds-surface-container-lowest); color: var(--dds-on-surface) !important;
    font-size: 14px; font-weight: 600; letter-spacing: .1px; line-height: 20px;
    text-decoration: none !important; white-space: nowrap;
}
.dds-m3-chip::before { content: ''; position: absolute; inset: 0; background: var(--dds-on-surface); opacity: 0; transition: opacity var(--dds-dur-short) var(--dds-ease); }
.dds-m3-chip:hover::before { opacity: var(--dds-state-hover); }
.dds-m3-chip:focus-visible { outline: 3px solid var(--dds-primary); outline-offset: 2px; }
.dds-m3-chip i { font-size: 16px; width: 18px; text-align: center; }

/* ── Cards ── */
.dds-m3-card          { border-radius: var(--dds-shape-md); background: var(--dds-surface-container-lowest); }
.dds-m3-card--outlined{ border: 1px solid var(--dds-outline-variant); }
.dds-m3-card--filled  { background: var(--dds-surface-container-high); }
.dds-m3-card--elevated{ box-shadow: var(--dds-elev-1); background: var(--dds-surface-container-low); }

@media (prefers-reduced-motion: reduce) {
    .dds-m3-btn, .dds-m3-btn::before, .dds-m3-chip::before { transition: none !important; }
}

/* Searchable dropdown (assets/js/dds-combo.js) */
.dds-combo-wrap { position: relative; display: inline-block; width: 100%; max-width: 360px; vertical-align: middle; }
.dds-combo-native { position: absolute !important; opacity: 0 !important; pointer-events: none !important; width: 1px !important; height: 1px !important; min-height: 0 !important; inset: 0 auto auto 0; }
.dds-combo-field { position: relative; display: flex; align-items: center; }
.dds-combo-field .dds-combo-dot { position: absolute; left: 12px; }
.dds-combo-wrap input.dds-combo-input, .wrap .dds-combo-wrap input.dds-combo-input {
  width: 100%; height: 40px; min-height: 40px; margin: 0; padding: 0 36px 0 12px; box-sizing: border-box;
  border: 1px solid var(--dds-outline); border-radius: var(--dds-shape-xs); background: var(--dds-surface-container-lowest);
  color: var(--dds-on-surface); font-size: 14px; line-height: 38px; box-shadow: none; text-overflow: ellipsis; cursor: pointer; }
.dds-combo-wrap.has-dot input.dds-combo-input { padding-left: 30px; }
.dds-combo-wrap.is-open input.dds-combo-input, .dds-combo-wrap input.dds-combo-input:focus { border-color: var(--dds-primary); box-shadow: inset 0 0 0 1px var(--dds-primary); outline: none; cursor: text; }
.dds-combo-caret { position: absolute; right: 8px; color: var(--dds-on-surface-variant); cursor: pointer; transition: transform .15s; }
.dds-combo-wrap.is-open .dds-combo-caret { transform: rotate(180deg); }
.dds-combo-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.dds-combo-dot[hidden] { display: none; }
.dds-combo-list { position: fixed; z-index: 100000; margin: 0; padding: 4px 0; list-style: none;
  max-height: 288px; overflow-y: auto; background: var(--dds-surface-container); border-radius: var(--dds-shape-xs); box-shadow: var(--dds-elev-2); min-width: 220px; }
.dds-combo-list[hidden] { display: none; }
.dds-combo-list li { display: flex; align-items: center; gap: 10px; min-height: 40px; margin: 0; padding: 0 12px; font-size: 14px; color: var(--dds-on-surface); cursor: pointer; }
.dds-combo-list li.is-active { background: color-mix(in srgb, var(--dds-on-surface) 8%, transparent); }
.dds-combo-list li[aria-selected="true"] { background: var(--dds-secondary-container); color: var(--dds-on-secondary-container); font-weight: 500; }
.dds-combo-list li.is-disabled { opacity: .45; cursor: default; }
.dds-combo-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dds-combo-note { font-size: 13px; color: var(--dds-on-surface-variant); white-space: nowrap; }
.dds-combo-list li.tone-ok .dds-combo-note { color: var(--dds-on-success-container); background: var(--dds-success-container); padding: 2px 8px; border-radius: 6px; }
.dds-combo-list li.tone-warn .dds-combo-note { color: var(--dds-on-caution-container); background: var(--dds-caution-container); padding: 2px 8px; border-radius: 6px; }
.dds-combo-list li.tone-err .dds-combo-note { color: var(--dds-on-error-container); background: var(--dds-error-container); padding: 2px 8px; border-radius: 6px; }
.dds-combo-check { color: var(--dds-primary); flex-shrink: 0; }
.dds-combo-empty { padding: 10px 12px; font-size: 14px; color: var(--dds-on-surface-variant); cursor: default; }

/* Status banners (shared by admin screens and the order panel) */
.dds-banner { display: flex; gap: 12px; align-items: flex-start; border-radius: var(--dds-shape-md); padding: 16px; margin: 0 0 24px; font-size: 14px; line-height: 20px; max-width: 900px; }
.dds-banner > .dashicons { flex-shrink: 0; margin-top: 1px; }
.dds-banner code { background: rgba(255,255,255,.6); }
.dds-banner--ok   { background: var(--dds-success-container); color: var(--dds-on-success-container); }
.dds-banner--warn { background: var(--dds-caution-container); color: var(--dds-on-caution-container); }
.dds-banner--err  { background: var(--dds-error-container);   color: var(--dds-on-error-container); }
.dds-banner--info { background: var(--dds-surface-container); color: var(--dds-on-surface); }
.dds-banner .dds-banner-sub { opacity: .85; margin-top: 4px; }
.dds-banner .button { margin-top: 12px; }
.dds-banner--err .button { color: var(--dds-error); border-color: var(--dds-error); }
.dds-banner--err .button:hover { background: color-mix(in srgb, var(--dds-error) 8%, transparent); }

/* A hidden attribute always hides, even on elements whose class sets display (switch rows, grids). */
[class*="dds-"][hidden] { display: none !important; }


/* ════════════════════════════════════════════════════════════════════
   Material 3 Expressive
   ════════════════════════════════════════════════════════════════════ */
:root {
    /* Extended shape scale */
    --dds-shape-lg-up: 20px;     /* large increased */
    --dds-shape-xl-up: 32px;     /* extra large increased */
    --dds-shape-xxl: 48px;       /* extra extra large */
    --dds-shape-inner: 4px;      /* inner corners of connected groups and segmented lists */

    /* Springs (M3 Expressive motion scheme), as CSS linear() curves.
       Spatial springs move and resize things and may overshoot a little; effects springs fade and recolor. */
    --dds-spring-fast: linear(0, .052, .177, .34, .511, .672, .809, .919, .999, 1.052, 1.082, 1.094, 1.093, 1.083, 1.069, 1.052, 1.037, 1.023, 1.011, 1.003, .997, .993, .991, .991, .992, .993, .994, .996, .997, .999, 1);
    --dds-spring:      linear(0, .029, .101, .198, .306, .415, .519, .614, .698, .77, .83, .879, .918, .948, .971, .988, .999, 1.007, 1.012, 1.014, 1.015, 1.015, 1.014, 1.013, 1.011, 1.009, 1.008, 1.006, 1.005, 1.004, 1);
    --dds-spring-fast-dur: 350ms;
    --dds-spring-dur: 500ms;
    --dds-effects: cubic-bezier(.31, .94, .34, 1);
    --dds-effects-dur: 200ms;
    --dds-ease: cubic-bezier(.2, 0, 0, 1);
}
/* Browsers without linear() get the standard curve. */
@supports not (transition-timing-function: linear(0, 1)) {
    :root { --dds-spring-fast: cubic-bezier(.42, 1.67, .21, .9); --dds-spring: cubic-bezier(.38, 1.21, .22, 1); }
}

/* Emphasized type: heavier weights for the things that matter most on a screen. */
.dds-display-sm--em  { font-size: 36px; line-height: 44px; font-weight: 600; letter-spacing: -.25px; }
.dds-headline-sm--em { font-size: 24px; line-height: 32px; font-weight: 600; }
.dds-title-lg--em    { font-size: 22px; line-height: 28px; font-weight: 700; }

/* ── Buttons: round at rest, morph toward square when pressed ── */
.dds-m3-btn {
    transition: border-radius var(--dds-spring-fast-dur) var(--dds-spring-fast),
                box-shadow var(--dds-effects-dur) var(--dds-effects),
                background-color var(--dds-effects-dur) var(--dds-effects);
}
.dds-m3-btn:active:not(:disabled) { border-radius: var(--dds-shape-md); }
.dds-m3-btn--text:active:not(:disabled) { border-radius: var(--dds-shape-sm); }
.dds-m3-btn--xs    { min-height: 32px; padding: 0 12px; font-size: 14px; gap: 4px; }
.dds-m3-btn--md    { min-height: 56px; padding: 0 24px; font-size: 16px; line-height: 24px; }
.dds-m3-btn--md:active:not(:disabled), .dds-m3-btn--large:active:not(:disabled) { border-radius: var(--dds-shape-lg); }
.dds-m3-btn--square { border-radius: var(--dds-shape-md); }
.dds-m3-btn--danger { background: var(--dds-error); color: var(--dds-on-error) !important; }
.dds-m3-btn:focus-visible { outline: 3px solid var(--dds-secondary); outline-offset: 2px; }

/* ── Connected button group (replaces segmented buttons) ──
   Buttons sit 2px apart. Outer corners are round, inner corners small, and the selected one turns fully round. */
.dds-btn-group, .dds-seg { display: inline-flex; gap: 2px; height: 40px; border: 0 !important; border-radius: 0 !important; overflow: visible !important; background: none; flex-shrink: 0; }
.dds-btn-group > *, .dds-seg > * {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    height: 40px; padding: 0 16px; border: 0 !important;
    border-radius: var(--dds-shape-sm); background: var(--dds-surface-container-high); color: var(--dds-on-surface) !important;
    font: inherit; font-size: 14px; font-weight: 500; letter-spacing: .1px; text-decoration: none; white-space: nowrap; cursor: pointer;
    transition: border-radius var(--dds-spring-fast-dur) var(--dds-spring-fast), background-color var(--dds-effects-dur) var(--dds-effects), color var(--dds-effects-dur) var(--dds-effects);
}
.dds-btn-group > :first-child, .dds-seg > :first-child { border-top-left-radius: 20px; border-bottom-left-radius: 20px; }
.dds-btn-group > :last-child,  .dds-seg > :last-child  { border-top-right-radius: 20px; border-bottom-right-radius: 20px; }
.dds-btn-group > :hover, .dds-seg > :hover { background: color-mix(in srgb, var(--dds-on-surface) 8%, var(--dds-surface-container-high)); }
.dds-btn-group > :active, .dds-seg > :active { border-radius: var(--dds-shape-inner); }
.dds-btn-group > .is-on, .dds-btn-group > [aria-pressed="true"], .dds-seg > .is-on, .dds-seg > [aria-pressed="true"] {
    background: var(--dds-primary) !important; color: var(--dds-on-primary) !important; border-radius: 20px; font-weight: 600;
}
.dds-btn-group > :focus-visible, .dds-seg > :focus-visible { outline: 3px solid var(--dds-secondary); outline-offset: 2px; position: relative; z-index: 1; }

/* ── Segmented list: siblings in a group share one rounded outline, 2px apart ── */
.dds-seg-list { display: flex; flex-direction: column; gap: 2px; }
.dds-seg-list > * { border-radius: var(--dds-shape-inner); }
.dds-seg-list > :first-child { border-top-left-radius: var(--dds-shape-lg-up); border-top-right-radius: var(--dds-shape-lg-up); }
.dds-seg-list > :last-child  { border-bottom-left-radius: var(--dds-shape-lg-up); border-bottom-right-radius: var(--dds-shape-lg-up); }

/* ── Cards, chips, banners: the expressive shape scale ── */
.dds-m3-card { border-radius: var(--dds-shape-lg-up); }
.dds-m3-chip { transition: border-radius var(--dds-spring-fast-dur) var(--dds-spring-fast); }
.dds-m3-chip:active { border-radius: var(--dds-shape-lg); }
.dds-banner { border-radius: var(--dds-shape-lg-up); padding: 16px 20px; }
.dds-combo-list { border-radius: var(--dds-shape-lg); padding: 6px; }
.dds-combo-list li { border-radius: var(--dds-shape-md); }
.dds-combo-wrap input.dds-combo-input, .wrap .dds-combo-wrap input.dds-combo-input { border-radius: var(--dds-shape-sm); }

/* ── Loading indicator: a shape that morphs as it spins (M3 Expressive) ──
   <span class="dds-loader" role="progressbar" aria-label="Loading"></span>; add --contained for a filled circle behind it. */
.dds-loader { display: inline-block; position: relative; width: 48px; height: 48px; flex-shrink: 0; }
.dds-loader::after {
    content: ''; position: absolute; inset: 9px; background: var(--dds-primary);
    border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
    animation: dds-morph 1.4s linear infinite, dds-spin-shape 1.4s var(--dds-ease) infinite;
}
.dds-loader--contained { border-radius: 50%; background: var(--dds-primary-container); }
.dds-loader--contained::after { inset: 12px; background: var(--dds-on-primary-container); }
.dds-loader--sm { width: 24px; height: 24px; }
.dds-loader--sm::after { inset: 4px; }
@keyframes dds-morph {
    0%   { border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%; }
    25%  { border-radius: 30% 30% 30% 30% / 30% 30% 30% 30%; }
    50%  { border-radius: 50% 50% 20% 80% / 25% 80% 20% 75%; }
    75%  { border-radius: 25% 75% 50% 50% / 50% 25% 75% 50%; }
    100% { border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%; }
}
@keyframes dds-spin-shape { to { transform: rotate(360deg); } }

/* Something that appears (a card opening, a dialog, a panel) springs into place. */
@keyframes dds-pop   { from { opacity: 0; transform: scale(.92); } }
@keyframes dds-rise  { from { opacity: 0; transform: translateY(24px); } }
@keyframes dds-fade  { from { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
    .dds-m3-btn, .dds-btn-group > *, .dds-seg > *, .dds-m3-chip { transition: none !important; }
    .dds-loader::after { animation-duration: 3s, 3s; }
}

/* 2.2.6: on the neutral page, info banners need an edge to stand out. */
.dds-banner--info { background: var(--dds-surface-container-lowest); border: 1px solid var(--dds-outline-variant); }