/* ===========================
   Tripmates – Mobile-First CSS
   =========================== */

/* ——— Custom Properties ——— */
:root {
    --color-primary:        #2563eb;
    --color-primary-dark:   #1d4ed8;
    --color-primary-light:  #dbeafe;
    --color-secondary:      #0891b2;
    --color-success:        #16a34a;
    --color-success-bg:     #dcfce7;
    --color-warning:        #d97706;
    --color-warning-bg:     #fef3c7;
    --color-danger:         #dc2626;
    --color-danger-bg:      #fee2e2;
    --color-info:           #0369a1;
    --color-info-bg:        #e0f2fe;

    --color-bg:             #f1f5f9;
    --color-surface:        #ffffff;
    --color-surface-2:      #f8fafc;
    --color-border:         #e2e8f0;
    --color-text:           #0f172a;
    --color-text-muted:     #64748b;
    --color-text-light:     #94a3b8;

    --color-header-bg:      #0f172a;
    --color-header-text:    #f8fafc;
    --color-footer-bg:      #0f172a;

    --radius-sm:    4px;
    --radius:       8px;
    --radius-lg:    12px;
    --radius-xl:    16px;
    --radius-full:  9999px;

    --shadow-sm:    0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.06);
    --shadow:       0 2px 8px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.04);
    --shadow-lg:    0 8px 24px rgba(0,0,0,.12);

    --transition:   0.18s ease;

    --bottom-nav-height: 62px;
}

/* ——— Reset / Base ——— */
*, *::before, *::after { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

img { max-width: 100%; height: auto; }

/* ——— Layout ——— */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ——— Header ——— */
.main-header {
    background-color: var(--color-header-bg);
    color: var(--color-header-text);
    padding: 0;
    box-shadow: 0 1px 0 rgba(255,255,255,.06), var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    height: 56px;
}

.logo-link {
    color: #fff;
    text-decoration: none;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -.02em;
    white-space: nowrap;
    flex-shrink: 0;
}
.logo-link:hover { text-decoration: none; color: #fff; }

/* Desktop nav */
.main-nav {
    display: flex;
    align-items: center;
    gap: .125rem;
    flex: 1;
}

.main-nav a {
    color: #94a3b8;
    text-decoration: none;
    padding: .375rem .75rem;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(255,255,255,.09);
    color: #fff;
    text-decoration: none;
}

.btn-nav-cta {
    background: var(--color-primary) !important;
    color: #fff !important;
    padding: .375rem .875rem !important;
    border-radius: var(--radius) !important;
}
.btn-nav-cta:hover { background: var(--color-primary-dark) !important; }

/* User section in header */
.header-user {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-left: auto;
    flex-shrink: 0;
}

.header-username {
    display: flex;
    align-items: center;
    gap: .5rem;
    color: #cbd5e1;
    font-size: .875rem;
    font-weight: 500;
    text-decoration: none;
    padding: .3rem .625rem;
    border-radius: var(--radius-full);
    transition: background var(--transition), color var(--transition);
}
.header-username:hover {
    background: rgba(255,255,255,.08);
    color: #fff;
    text-decoration: none;
}

.avatar-initial {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: #fff;
    font-size: .78rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* When used standalone as a link (mobile) */
a.avatar-initial {
    width: 34px;
    height: 34px;
    font-size: .85rem;
    text-decoration: none;
}
a.avatar-initial:hover { background: var(--color-primary-dark); text-decoration: none; }

.header-logout {
    color: #94a3b8;
    font-size: .875rem;
    font-weight: 500;
    text-decoration: none;
    padding: .3rem .7rem;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,.12);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    white-space: nowrap;
}
.header-logout:hover {
    background: rgba(220,38,38,.15);
    border-color: rgba(220,38,38,.4);
    color: #fca5a5;
    text-decoration: none;
}

/* ——— Main Content ——— */
.main-content {
    flex-grow: 1;
    padding-top: 1.5rem;
    padding-bottom: calc(2rem + var(--bottom-nav-height));
}

/* ——— Footer ——— */
.main-footer {
    background-color: var(--color-footer-bg);
    color: #475569;
    text-align: center;
    padding: 1.25rem 0;
    margin-top: auto;
    font-size: .85rem;
    padding-bottom: calc(1.25rem + var(--bottom-nav-height));
}
.main-footer a { color: #64748b; }
.main-footer a:hover { color: #94a3b8; }

@media (min-width: 768px) {
    .main-content  { padding-bottom: 2rem; }
    .main-footer   { padding-bottom: 1.25rem; }
}

/* ——— Bottom Navigation (mobile only) ——— */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    z-index: 200;
    box-shadow: 0 -4px 16px rgba(0,0,0,.07);
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: .65rem;
    font-weight: 500;
    gap: 3px;
    min-height: 44px;
    transition: color var(--transition);
    -webkit-tap-highlight-color: transparent;
    position: relative;
}

.bottom-nav-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: var(--color-primary);
    transition: width var(--transition);
}

.bottom-nav-item:hover,
.bottom-nav-item.active {
    color: var(--color-primary);
    text-decoration: none;
}

.bottom-nav-item.active::after {
    width: 32px;
}

.bottom-nav-icon {
    font-size: 1.3rem;
    line-height: 1;
}

@media (min-width: 768px) {
    .bottom-nav { display: none; }
}

/* ——— Cards ——— */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition);
}

.card-link {
    display: block;
    color: var(--color-text);
    transition: box-shadow var(--transition), transform var(--transition);
}
.card-link:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    text-decoration: none;
}

.card-header {
    padding: .875rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-surface-2);
}
.card-header h2, .card-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.card-body { padding: 1.25rem; }

.card-footer {
    padding: .75rem 1.25rem;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface-2);
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    align-items: center;
}

.card-title {
    margin: 0 0 .25rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.card-meta {
    margin: .2rem 0;
    font-size: .83rem;
    color: var(--color-text-muted);
}

.card-text {
    margin: .5rem 0 0;
    font-size: .9rem;
    color: var(--color-text-muted);
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
@media (min-width: 600px)  { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px)  { .card-grid { grid-template-columns: repeat(3, 1fr); } }

/* ——— Buttons ——— */
.button,
button[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .375rem;
    background-color: var(--color-primary);
    color: #fff;
    padding: .6rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: .925rem;
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
    white-space: nowrap;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
    letter-spacing: .01em;
}

.button:hover,
button[type="submit"]:hover {
    background-color: var(--color-primary-dark);
    text-decoration: none;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37,99,235,.25);
}

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

.button-success       { background-color: var(--color-success); }
.button-success:hover { background-color: #15803d; box-shadow: 0 4px 12px rgba(22,163,74,.25); }

.button-danger        { background-color: var(--color-danger); }
.button-danger:hover  { background-color: #b91c1c; box-shadow: 0 4px 12px rgba(220,38,38,.25); }

.button-secondary       { background-color: #475569; }
.button-secondary:hover { background-color: #334155; }

.button-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}
.button-outline:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    box-shadow: none;
}

.button-sm  { padding: .375rem .75rem; font-size: .85rem; min-height: 36px; }
.button-lg  { padding: .875rem 2rem; font-size: 1.05rem; }
.button-full { width: 100%; }

/* ——— Forms ——— */
.form-container {
    background-color: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    max-width: 480px;
    margin: 1.5rem auto;
    border: 1px solid var(--color-border);
}

.form-container h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    font-size: 1.5rem;
    font-weight: 700;
}

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

.form-group label {
    display: block;
    margin-bottom: .375rem;
    font-weight: 600;
    font-size: .875rem;
    color: var(--color-text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group textarea,
.form-group select,
input[type="text"].form-control,
input[type="email"].form-control,
input[type="date"].form-control,
input[type="number"].form-control,
select.form-control,
textarea.form-control {
    width: 100%;
    padding: .625rem .875rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-size: .95rem;
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
    min-height: 44px;
    appearance: none;
    -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.form-group textarea { min-height: 100px; resize: vertical; }
.form-group button[type="submit"] { width: 100%; }

.form-link {
    text-align: center;
    margin-top: 1rem;
    font-size: .9rem;
    color: var(--color-text-muted);
}

.form-hint {
    font-size: .8rem;
    color: var(--color-text-muted);
    margin-top: .3rem;
    line-height: 1.4;
}

/* ——— Messages ——— */
.message {
    padding: .875rem 1.125rem;
    margin-bottom: 1rem;
    border-radius: var(--radius);
    font-size: .9rem;
    border-left: 4px solid transparent;
}

.error-message   { background-color: var(--color-danger-bg);  color: #991b1b; border-left-color: var(--color-danger); }
.success-message { background-color: var(--color-success-bg); color: #166534; border-left-color: var(--color-success); }
.info-message    { background-color: var(--color-info-bg);    color: var(--color-info); border-left-color: var(--color-info); }
.warning-message { background-color: var(--color-warning-bg); color: #92400e; border-left-color: var(--color-warning); }

/* ——— Status Badges ——— */
.badge {
    display: inline-flex;
    align-items: center;
    padding: .2rem .65rem;
    border-radius: var(--radius-full);
    font-size: .75rem;
    font-weight: 600;
    white-space: nowrap;
    letter-spacing: .01em;
}

.status-approved,
.badge-approved  { background-color: var(--color-success-bg); color: #166534; }
.status-pending,
.badge-pending   { background-color: var(--color-warning-bg); color: #92400e; }
.status-rejected,
.badge-rejected  { background-color: var(--color-danger-bg);  color: #991b1b; }
.badge-info      { background-color: var(--color-info-bg);    color: var(--color-info); }
.badge-proposed  { background-color: var(--color-primary-light); color: var(--color-primary-dark); }
.badge-selected  { background-color: var(--color-success-bg); color: #166534; }
.badge-planned   { background-color: var(--color-info-bg);    color: var(--color-info); }
.badge-done      { background-color: #f0fdf4; color: #14532d; }
.badge-cancelled { background-color: #f1f5f9; color: var(--color-text-muted); }

/* ——— Tables ——— */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-surface);
    font-size: .9rem;
}

th, td {
    border-bottom: 1px solid var(--color-border);
    padding: .75rem 1rem;
    text-align: left;
    vertical-align: middle;
}

th {
    background-color: var(--color-surface-2);
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background-color: #fafbfd; }

/* ——— Page Headers ——— */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1, .page-header h2 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--color-text);
}

@media (max-width: 480px) {
    .page-header h1, .page-header h2 { font-size: 1.3rem; }
}

/* ——— Sections ——— */
.section { margin-bottom: 2rem; }

.section-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 1rem;
    padding-bottom: .5rem;
    border-bottom: 2px solid var(--color-border);
    color: var(--color-text);
    letter-spacing: -.01em;
}

/* ——— Tabs ——— */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab-btn {
    padding: .625rem 1.1rem;
    border: none;
    background: none;
    font-size: .875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition);
    min-height: 44px;
    border-radius: var(--radius) var(--radius) 0 0;
}

.tab-btn:hover { color: var(--color-primary); background: rgba(37,99,235,.04); }

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

.tab-panel         { display: none; }
.tab-panel.active  { display: block; }

/* ——— Availability Grid (edit) ——— */
.availability-grid { display: grid; gap: .25rem; margin-bottom: 1.25rem; }

.availability-row {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .3rem .375rem;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid var(--color-border);
}
.availability-row:last-child { border-bottom: none; }
.avail-weekend   { background: var(--color-surface-2); }
.avail-week-start { border-top: 2px solid var(--color-border); margin-top: .25rem; padding-top: .375rem; }

.avail-month-label {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--color-text-muted);
    padding: .75rem 0 .125rem;
}

.availability-date {
    font-size: .82rem;
    color: var(--color-text-muted);
    min-width: 90px;
    flex-shrink: 0;
}
.avail-weekday {
    display: inline-block;
    min-width: 22px;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.avail-btn-group { display: flex; gap: .25rem; }

.avail-btn {
    padding: .3rem .5rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    font-size: .82rem;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 34px;
    min-width: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    opacity: .55;
}
.avail-btn:hover { border-color: var(--color-primary); background: var(--color-primary-light); opacity: 1; }
.avail-btn.active-available  { background: var(--color-success-bg); border-color: var(--color-success); opacity: 1; }
.avail-btn.active-maybe      { background: var(--color-warning-bg); border-color: var(--color-warning); opacity: 1; }
.avail-btn.active-unavailable{ background: var(--color-danger-bg);  border-color: var(--color-danger);  opacity: 1; }

.avail-legend { display: flex; gap: .75rem; flex-wrap: wrap; color: var(--color-text-muted); }
.avail-legend-item { display: inline-flex; align-items: center; gap: .3rem; }

.avail-banner {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: .875rem;
    border-left: 4px solid;
}
.avail-banner-confirmed { background: var(--color-success-bg); border-color: var(--color-success); color: #14532d; }
.avail-banner-planning  { background: var(--color-info-bg);    border-color: var(--color-primary); color: var(--color-info); }
.avail-banner-none      { background: var(--color-warning-bg); border-color: var(--color-warning); color: #78350f; }

.avail-range-details summary,
.propose-details summary {
    cursor: pointer;
    color: var(--color-primary);
    font-weight: 500;
    font-size: .875rem;
    padding: .25rem 0;
    user-select: none;
}
.avail-range-details summary:hover,
.propose-details summary:hover { text-decoration: underline; }

/* ——— Availability Matrix (overview) ——— */
.avail-matrix-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}
.avail-matrix {
    width: max-content;
    min-width: 100%;
    border-collapse: collapse;
    font-size: .78rem;
}
.avail-matrix th,
.avail-matrix td { border: 1px solid var(--color-border); }

.avail-name-col {
    padding: .375rem .625rem !important;
    white-space: nowrap;
    position: sticky;
    left: 0;
    background: var(--color-surface);
    z-index: 2;
    min-width: 90px;
    font-size: .78rem;
    font-weight: 500;
}
.avail-day-col {
    text-align: center;
    min-width: 34px;
    width: 34px;
    padding: .2rem .1rem !important;
    vertical-align: bottom;
}
.avail-dow { display: block; font-size: .6rem; font-weight: 700; text-transform: uppercase; color: var(--color-text-muted); }
.avail-dom { display: block; font-size: .72rem; font-weight: 500; }

.avail-weekend-col { background-color: var(--color-surface-2) !important; }
.avail-week-sep    { border-left: 2px solid var(--color-border) !important; }

.avail-cell { height: 28px; width: 34px; }
.avail-cell.avail-available   { background: var(--color-success-bg); }
.avail-cell.avail-maybe       { background: var(--color-warning-bg); }
.avail-cell.avail-unavailable { background: var(--color-danger-bg); }

tfoot .avail-count {
    text-align: center;
    font-weight: 700;
    font-size: .75rem;
    padding: .25rem .1rem !important;
    height: 28px;
    vertical-align: middle;
}
.avail-count-high { background: var(--color-success-bg); color: var(--color-success); }
.avail-count-mid  { background: var(--color-warning-bg); color: var(--color-warning); }
.avail-count-low  { background: var(--color-danger-bg);  color: var(--color-danger); }
.avail-maybe-small { font-size: .62rem; opacity: .75; }

.avail-my-row > .avail-name-col { background: var(--color-primary-light) !important; }
.avail-me-tag {
    font-size: .58rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-full);
    padding: 1px 5px;
    vertical-align: middle;
    margin-left: 3px;
}

/* ——— Hero Section ——— */
.hero-section {
    text-align: center;
    padding: 3.5rem 1rem 2.5rem;
}

.hero-content h1 {
    font-size: clamp(2rem, 7vw, 3.5rem);
    margin: 0 0 .75rem;
    color: var(--color-text);
    font-weight: 800;
    letter-spacing: -.04em;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.2rem);
    color: var(--color-text-muted);
    margin: 0 0 2rem;
}

.hero-actions {
    display: flex;
    gap: .75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}
@media (min-width: 600px) { .hero-features { grid-template-columns: repeat(3, 1fr); } }

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    text-align: center;
}

.feature-icon { font-size: 2rem; margin-bottom: .75rem; }
.feature-card h3 { margin: 0 0 .5rem; font-size: .95rem; }
.feature-card p  { margin: 0; font-size: .85rem; color: var(--color-text-muted); }

/* ——— Finance / Balance ——— */
.balance-positive { color: var(--color-danger);  font-weight: 700; }
.balance-negative { color: var(--color-success); font-weight: 700; }
.balance-zero     { color: var(--color-text-muted); }

/* ——— Utilities ——— */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--color-text-muted); }
.text-small  { font-size: .85rem; }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: .5rem; }
.mb-2 { margin-bottom: 1rem; }
.d-flex          { display: flex; }
.gap-1           { gap: .5rem; }
.gap-2           { gap: 1rem; }
.flex-wrap       { flex-wrap: wrap; }
.align-center    { align-items: center; }
.justify-between { justify-content: space-between; }
.w-100           { width: 100%; }

/* ——— Responsive Utilities ——— */
@media (max-width: 767px)  { .desktop-only { display: none !important; } }
@media (min-width: 768px)  { .mobile-only  { display: none !important; } }

/* ——— Responsive Tables (mobile stacked) ——— */
@media screen and (max-width: 640px) {
    .table-responsive thead { display: none; }

    .table-responsive,
    .table-responsive tbody,
    .table-responsive tr,
    .table-responsive td {
        display: block;
        width: 100%;
    }

    .table-responsive tr {
        margin-bottom: 1rem;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        overflow: hidden;
    }

    .table-responsive td {
        text-align: right;
        padding-left: 50%;
        position: relative;
        border-bottom: 1px solid var(--color-border);
    }
    .table-responsive td:last-child { border-bottom: none; }

    .table-responsive td::before {
        content: attr(data-label);
        position: absolute;
        left: .75rem;
        width: calc(50% - 1.25rem);
        font-weight: 600;
        font-size: .8rem;
        text-align: left;
        color: var(--color-text-muted);
    }
}

/* ——— Fieldset ——— */
fieldset {
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: .875rem 1rem;
    margin-bottom: 1rem;
}

legend {
    padding: 0 .5rem;
    font-weight: 600;
    font-size: .9rem;
    color: var(--color-text);
}