/* --------------------------------------------------------------
   Tripender base.

   Cold northern light: paper white, blue-black ink, fjord blue, and
   one low-sun orange. The orange means time. It marks overlap bars,
   active trips and act-now affordances, never decoration. Avatars are
   initials on a tinted square, never circular photos. No emoji.

   Two oranges on purpose: --color-accent is the graphic one for bars,
   dots and badges, --color-accent-ink is darkened for orange text on
   a light background, where the bright one falls below 4.5:1.
   -------------------------------------------------------------- */

:root {
    --color-bg:            #F3F6F8;
    --color-surface:       #FFFFFF;
    --color-surface-mut:   #E9EEF2;
    --color-ink:           #14202B;
    --color-ink-muted:     rgba(20, 32, 43, 0.62);
    --color-ink-faint:     rgba(20, 32, 43, 0.42);
    --color-border:        rgba(20, 40, 60, 0.10);
    --color-border-strong: rgba(20, 40, 60, 0.18);

    --color-primary:       #17568C;
    --color-primary-dark:  #0E3B63;
    --color-primary-soft:  #D8E5F1;
    --color-accent:        #ED6A1F;
    --color-accent-ink:    #B4470C;
    --color-accent-soft:   #FBE1CE;
    --color-warning:       #C2560F;
    --color-danger:        #BE3A24;
    --color-danger-soft:   #F9DFD6;
    --color-success:       #2F7D5B;
    --color-pass:          #78838F;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-pill: 999px;

    --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-body:    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono:    'Roboto Mono', ui-monospace, "SF Mono", Menlo, monospace;

    --shadow-card: 0 8px 24px rgba(20, 32, 43, 0.06);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0; }
}

*, *::before, *::after {
    box-sizing: border-box;
}

/* The browser hides [hidden] with display:none from its own stylesheet,
   which any id selector setting display beats on specificity alone. That
   left an undo button and a whole action row on screen with hidden set.
   One rule here so it cannot happen again; this is what !important is for. */
[hidden] {
    display: none !important;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.45;
    text-align: left;
}

h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--color-ink);
    letter-spacing: -0.02em;
    font-weight: 600;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Icons are inline <svg><use> - one shared sprite, no icon font */
.icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
    color: currentColor;
}

/* ---------------------------------------------------------------
   Forms
   --------------------------------------------------------------- */

fieldset {
    max-width: 740px;
    width: 100%;
    margin: 0 auto 14px;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    box-sizing: border-box;
    padding: 14px 16px 18px;
}
fieldset > legend {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--color-ink-muted);
    padding: 0 8px;
    font-weight: 500;
}

label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--color-ink-muted);
    margin: 14px 0 6px;
}
label:first-of-type {
    margin-top: 4px;
}

.hint {
    color: var(--color-ink-faint);
    font-weight: 400;
    font-size: 12px;
    margin-top: 6px;
}

input, textarea, select {
    width: 100%;
    padding: 11px 12px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-ink);
    font-family: var(--font-body);
    min-height: 44px;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}
textarea {
    min-height: 90px;
    resize: vertical;
    line-height: 1.45;
}

.row {
    display: flex;
    gap: 12px;
}
.row > .field {
    flex: 1 1 50%;
    min-width: 0;
}
.row > fieldset {
    flex: 1 1 50%;
}

.form-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 18px;
}

/* Chip toggles - used for trip purpose, openness and profile tags */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.chip-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    min-height: 44px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-strong);
    background: var(--color-surface);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    text-align: left;
}
.chip-toggle:hover {
    border-color: var(--color-primary);
}
.chip-toggle.selected {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}
.chip-toggle .chip-sub {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 400;
    letter-spacing: 0.2px;
    color: var(--color-ink-faint);
}
.chip-toggle.selected .chip-sub {
    color: var(--color-primary-dark);
    opacity: 0.75;
}

/* ---------------------------------------------------------------
   Buttons
   --------------------------------------------------------------- */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: var(--color-primary);
    color: #ffffff;
    border-radius: 10px;
    text-align: center;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    min-width: 120px;
    min-height: 44px;
    border: none;
    padding: 13px 18px;
    cursor: pointer;
    letter-spacing: -0.01em;
}
.button:hover {
    background-color: var(--color-primary-dark);
    text-decoration: none;
    color: #ffffff;
}
.button[disabled] {
    opacity: 0.55;
    cursor: default;
}
.button_ghost {
    background-color: transparent;
    border: 1px solid var(--color-border-strong);
    color: var(--color-ink);
}
.button_ghost:hover {
    background-color: var(--color-surface);
    color: var(--color-ink);
}
.button_danger {
    background-color: var(--color-danger);
}

/* ---------------------------------------------------------------
   Message bar
   --------------------------------------------------------------- */

.message-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 18px 20px;
    text-align: center;
    z-index: 10000;
    font-weight: 500;
    font-size: 14.5px;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}
.message-bar.is-visible {
    transform: translateY(0);
}
.message-bar.info    { background-color: var(--color-primary); color: #fff; }
.message-bar.warning { background-color: var(--color-warning); color: #fff; }
.message-bar.alert   { background-color: var(--color-danger);  color: #fff; }

/* ---------------------------------------------------------------
   Header, nav, footer
   --------------------------------------------------------------- */

#header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border);
    background-color: rgba(243, 246, 248, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
}
#header .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}
#header .brand:hover {
    text-decoration: none;
}
#header .wordmark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    color: var(--color-ink);
    letter-spacing: -0.02em;
}
.header_action {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    color: var(--color-ink-muted);
    font-size: 14px;
    font-weight: 600;
}

body.is-app {
    padding-bottom: 74px;
}

#app-nav {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
    padding: 8px 0 max(8px, env(safe-area-inset-bottom));
    z-index: 50;
}
#app-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--color-ink-faint);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-decoration: none;
    padding: 6px 14px;
    min-width: 44px;
    min-height: 44px;
}
#app-nav a:hover {
    text-decoration: none;
}
#app-nav a.active {
    color: var(--color-primary);
}

#site-footer {
    padding: 30px 18px calc(30px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--color-border);
    color: var(--color-ink-faint);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.6px;
    text-align: center;
}

/* ---------------------------------------------------------------
   Shared page furniture
   --------------------------------------------------------------- */

.page-head {
    max-width: 740px;
    width: 100%;
    margin: 0 auto 16px;
    padding: 20px 0 0;
}
.page-head .eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1.2px;
    color: var(--color-ink-muted);
    text-transform: uppercase;
}
.page-head h1 {
    margin: 4px 0 0;
    font-size: 30px;
    letter-spacing: -0.03em;
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}

/* Small explanations: a question mark, and the paragraph it opens */
/* Raised off the baseline like a footnote mark, which is what it is.
   Small enough not to compete with the heading, loud enough to be found:
   at ink-faint on a border-strong ring it was invisible in practice.
   The thumb still gets 44px through the pseudo-element below. */
.help-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 19px;
    height: 19px;
    padding: 0;
    margin-left: 6px;
    border: 1.5px solid var(--color-danger);
    border-radius: 50%;
    background: none;
    color: var(--color-danger);
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    cursor: pointer;
    vertical-align: super;
}
.help-toggle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 44px;
    height: 44px;
    transform: translate( -50%, -50% );
}
.help-toggle:hover,
.help-toggle.is-open {
    background: var(--color-danger);
    color: #fff;
}

.help-text {
    margin: 8px 0 14px;
    padding: 11px 13px;
    background: var(--color-surface-mut);
    border-radius: 10px;
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--color-ink-muted);
}
.help-text strong {
    color: var(--color-ink);
    font-weight: 600;
}

/* ---------------------------------------------------------------
   Dialog
   --------------------------------------------------------------- */

.dialog-backdrop {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(20, 32, 43, 0.45);
}
.dialog {
    width: 100%;
    max-width: 420px;
    padding: 22px 22px 18px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(20, 32, 43, 0.28);
    animation: dialog-in 0.14s ease-out;
}
.dialog h2 {
    margin: 0 0 8px;
    font-size: 19px;
}
.dialog p {
    margin: 0 0 20px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-ink-muted);
}
.dialog p:empty {
    display: none;
}
.dialog-actions {
    display: flex;
    gap: 10px;
}
.dialog-actions .button {
    flex: 1;
    min-width: 0;
}
/* The page behind must not scroll out from under the question */
body.dialog-open {
    overflow: hidden;
}

@keyframes dialog-in {
    from { opacity: 0; transform: translateY(6px) scale(0.98); }
}
@media (prefers-reduced-motion: reduce) {
    .dialog { animation: none; }
}

.empty {
    padding: 22px 4px;
    color: var(--color-ink-faint);
    font-size: 14px;
}

/* Initials on a tinted square. Deliberate - this is not a dating app. */
.avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
    font-family: var(--font-display);
    font-weight: 600;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
}
.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.verified-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 8px;
    background: var(--color-success);
    color: #fff;
}
.verified-badge .icon {
    width: 11px;
    height: 11px;
}

@media (max-width: 600px) {
    fieldset { max-width: 100%; }
    .row { flex-direction: column; gap: 0; }
    .page-head h1 { font-size: 26px; }
}