/* =========================================================================
   style.css - Clinic Appointment Booking System
   Mobile-first, CSS-variable-driven, modern healthcare theme.
   ========================================================================= */

:root {
    /* Colors (overridable per-clinic via inline <style> in header.php) */
    --color-primary: #0B6FBF;
    --color-primary-dark: #08508C;
    --color-primary-light: #E7F1FB;
    --color-bg: #F4F7FB;
    --color-surface: #FFFFFF;
    --color-text: #1B2430;
    --color-text-muted: #6B7686;
    --color-border: #E1E7EF;

    --color-success: #1B9E5A;
    --color-success-bg: #E6F7EE;
    --color-warning: #C9861A;
    --color-warning-bg: #FDF3E1;
    --color-danger: #D6483F;
    --color-danger-bg: #FBEAE9;
    --color-info: #2E6FD9;
    --color-info-bg: #E9F1FE;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-pill: 999px;

    --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 16px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);

    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-fast: 150ms ease;
    --transition-base: 220ms ease;
    --header-height: 64px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #10151C;
        --color-surface: #1A212C;
        --color-text: #EDF1F7;
        --color-text-muted: #94A0B4;
        --color-border: #2A3441;
        --color-primary-light: #16283B;
        --color-success-bg: #103322;
        --color-warning-bg: #332B12;
        --color-danger-bg: #3A1E1C;
        --color-info-bg: #142A44;
    }
}

/* ---------------- Reset & Base ---------------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; }

/* ---------------- Layout shells ---------------- */
.site-main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px 16px 64px;
    min-height: calc(100vh - var(--header-height) - 160px);
}

.section { margin-bottom: 40px; }
.section--narrow { max-width: 560px; margin-left: auto; margin-right: auto; }
.section__title { font-size: 1.3rem; margin-bottom: 16px; }

.page-heading { margin-bottom: 20px; }
.page-heading h1 { font-size: 1.6rem; }
.page-heading p { color: var(--color-text-muted); margin: 0; }
.page-heading--row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-end;
    gap: 12px;
}
.page-heading__actions { display: flex; gap: 8px; }

.muted { color: var(--color-text-muted); }
.small { font-size: 0.82rem; }
.mono { font-variant-numeric: tabular-nums; font-weight: 600; letter-spacing: 0.02em; }

/* ---------------- Header / Nav ---------------- */
.site-header {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 40;
}
.site-header__inner {
    max-width: 1120px;
    margin: 0 auto;
    height: 100%;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-text);
}
.brand__icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
}

.main-nav {
    display: none;
    align-items: center;
    gap: 20px;
    font-size: 0.92rem;
}
.main-nav a { color: var(--color-text); font-weight: 500; padding: 6px 2px; border-bottom: 2px solid transparent; }
.main-nav a.active, .main-nav a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.main-nav .nav-user { color: var(--color-text-muted); }
.main-nav .nav-logout { color: var(--color-danger); }

.main-nav.main-nav--open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 16px;
    box-shadow: var(--shadow-md);
    gap: 14px;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--color-text); border-radius: 2px; }

@media (min-width: 860px) {
    .main-nav { display: flex; position: static; box-shadow: none; padding: 0; border: 0; background: none; flex-direction: row; }
    .nav-toggle { display: none; }
}

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 24px 16px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}
.site-footer__meta { margin-top: 4px; }

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover:not(:disabled) { background: var(--color-primary-dark); }

.btn--secondary { background: var(--color-primary-light); color: var(--color-primary-dark); }
.btn--secondary:hover:not(:disabled) { background: var(--color-primary); color: #fff; }

.btn--outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--outline:hover:not(:disabled) { background: var(--color-primary-light); }

.btn--ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn--ghost:hover:not(:disabled) { background: var(--color-bg); }

.btn--danger-outline { background: transparent; color: var(--color-danger); border-color: var(--color-danger); }
.btn--danger-outline:hover:not(:disabled) { background: var(--color-danger-bg); }

.btn--lg { padding: 14px 28px; font-size: 1.02rem; border-radius: var(--radius-md); }
.btn--sm { padding: 7px 14px; font-size: 0.85rem; }
.btn--xs { padding: 5px 10px; font-size: 0.78rem; border-radius: 6px; }
.btn--block { width: 100%; }

.btn-spinner {
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
.btn--outline .btn-spinner, .btn--ghost .btn-spinner, .btn--secondary .btn-spinner {
    border-color: rgba(11,111,191,0.25);
    border-top-color: var(--color-primary);
}
@keyframes spin { to { transform: rotate(360deg); } }

.install-app-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    animation: fadeInUp 0.4s ease;
}
.install-app-btn[hidden] { display: none; }

/* ---------------- Cards ---------------- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }

.doctor-card { text-align: center; animation: fadeInUp 0.3s ease; }
.doctor-card__avatar {
    width: 56px; height: 56px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1.2rem;
}
.doctor-card__name { font-size: 1.02rem; margin-bottom: 2px; }
.doctor-card__dept { color: var(--color-primary); font-size: 0.85rem; margin-bottom: 4px; }
.doctor-card__hours { color: var(--color-text-muted); font-size: 0.82rem; margin-bottom: 14px; }

/* ---------------- Hero (homepage) ---------------- */
.hero {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding: 32px 0 16px;
}
.hero__eyebrow { color: var(--color-primary); font-weight: 600; margin-bottom: 4px; }
.hero__title { font-size: 2rem; margin-bottom: 12px; }
.hero__subtitle { color: var(--color-text-muted); font-size: 1.02rem; max-width: 520px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }

.hero__cards { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 640px) { .hero__cards { grid-template-columns: repeat(3, 1fr); } }

.stat-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
}
.stat-card__icon { font-size: 1.6rem; }
.stat-card__label { color: var(--color-text-muted); font-size: 0.82rem; margin: 0; }
.stat-card__value { font-weight: 700; font-size: 1.05rem; margin: 0; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    font-weight: 600;
}

.cta-banner {
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 40px 24px;
}
.cta-banner h2 { font-size: 1.4rem; }
.cta-banner p { opacity: 0.9; }
.cta-banner .btn--primary { background: #fff; color: var(--color-primary-dark); }
.cta-banner .btn--primary:hover { background: #F0F4FA; }

/* ---------------- Forms ---------------- */
.form-card { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 560px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-row--filters { grid-template-columns: 1fr; }
@media (min-width: 760px) { .form-row--filters { grid-template-columns: 2fr 1fr 1fr 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.86rem; font-weight: 600; color: var(--color-text); }
.form-group .req { color: var(--color-danger); }

input[type="text"], input[type="tel"], input[type="number"], input[type="date"],
input[type="password"], input[type="email"], select, textarea {
    font-family: inherit;
    font-size: 0.95rem;
    padding: 11px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    width: 100%;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}
textarea { resize: vertical; min-height: 70px; }

.radio-row { display: flex; flex-wrap: wrap; gap: 8px; }
.radio-pill {
    display: flex; align-items: center; gap: 6px;
    padding: 9px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    font-size: 0.88rem;
    cursor: pointer;
}
.radio-pill:has(input:checked) { border-color: var(--color-primary); background: var(--color-primary-light); color: var(--color-primary-dark); }

.field-error { color: var(--color-danger); font-size: 0.78rem; min-height: 1em; }
.form-note { font-size: 0.88rem; color: var(--color-text-muted); min-height: 1em; }
.form-note--error { color: var(--color-danger); font-weight: 600; }
.form-actions { margin-top: 4px; }
.form-actions--inline { display: flex; gap: 10px; }

.filter-card { margin-bottom: 12px; }
.result-count { margin: 0 0 12px; font-size: 0.85rem; }

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 16px;
}
.alert--success { background: var(--color-success-bg); color: var(--color-success); }

/* ---------------- Login ---------------- */
.login-section { display: flex; justify-content: center; padding-top: 24px; }
.login-card { width: 100%; }
.login-card__header { text-align: center; margin-bottom: 20px; }
.login-card__icon { font-size: 2rem; display: block; margin-bottom: 8px; }

/* ---------------- Success / Token / Status ---------------- */
.success-section { text-align: center; }
.success-icon {
    width: 64px; height: 64px;
    margin: 0 auto 16px;
    background: var(--color-success-bg);
    color: var(--color-success);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem;
    animation: popIn 0.35s ease;
}
.success-heading { font-size: 1.5rem; }
.success-sub { color: var(--color-text-muted); }

.token-card { text-align: left; margin: 24px 0; }
.token-card__header { text-align: center; margin-bottom: 20px; }
.token-card__clinic { color: var(--color-text-muted); font-size: 0.85rem; margin: 0; }
.token-card__label { color: var(--color-primary); font-weight: 600; margin: 8px 0 4px; }
.token-card__token { font-size: 2.6rem; font-weight: 800; color: var(--color-primary-dark); margin: 0; letter-spacing: 0.04em; }

.token-card__details { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 0; }
.token-card__details div { border-top: 1px dashed var(--color-border); padding-top: 8px; }
.token-card__details dt { font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.token-card__details dd { margin: 2px 0 0; font-weight: 600; }

.success-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 20px; }

.status-empty { text-align: center; color: var(--color-text-muted); padding: 24px 0; }

.queue-card { margin-top: 20px; animation: fadeInUp 0.3s ease; }
.queue-card__row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; text-align: center; margin-bottom: 16px; }
.queue-metric { padding: 12px 8px; border-radius: var(--radius-md); background: var(--color-bg); }
.queue-metric--highlight { background: var(--color-primary-light); }
.queue-metric__label { font-size: 0.72rem; color: var(--color-text-muted); text-transform: uppercase; margin: 0 0 4px; }
.queue-metric__value { font-size: 1.5rem; font-weight: 800; margin: 0; color: var(--color-primary-dark); }
.queue-card__status { text-align: center; margin-bottom: 16px; }
.queue-card__refresh { text-align: center; font-size: 0.78rem; color: var(--color-text-muted); margin: 16px 0 0; }
.status-result__actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 18px; }
.status-result__actions[hidden] { display: none; }

/* ---------------- Status badges ---------------- */
.status-badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-weight: 700;
    background: var(--color-info-bg);
    color: var(--color-info);
}
.status-badge--waiting { background: var(--color-warning-bg); color: var(--color-warning); }
.status-badge--called { background: var(--color-info-bg); color: var(--color-info); }
.status-badge--in-consultation { background: var(--color-primary-light); color: var(--color-primary-dark); }
.status-badge--completed { background: var(--color-success-bg); color: var(--color-success); }
.status-badge--cancelled { background: var(--color-danger-bg); color: var(--color-danger); }

/* ---------------- Tables ---------------- */
.table-wrap { padding: 0; overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.data-table th, .data-table td { text-align: left; padding: 12px 16px; font-size: 0.88rem; border-bottom: 1px solid var(--color-border); white-space: nowrap; }
.data-table th { color: var(--color-text-muted); font-weight: 600; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.03em; background: var(--color-bg); }
.data-table td { white-space: normal; }
.data-table tbody tr:hover { background: var(--color-bg); }
.empty-row { text-align: center !important; color: var(--color-text-muted); padding: 32px !important; }
.row-actions { display: flex; flex-wrap: wrap; gap: 6px; white-space: nowrap; }

/* ---------------- Admin / Doctor dashboards ---------------- */
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 640px) { .stats-grid { grid-template-columns: repeat(5, 1fr); } }
.stats-grid--compact { grid-template-columns: repeat(3, 1fr); }

.stat-tile {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-primary);
}
.stat-tile__label { color: var(--color-text-muted); font-size: 0.78rem; margin: 0 0 6px; }
.stat-tile__value { font-size: 1.7rem; font-weight: 800; margin: 0; }
.stat-tile--waiting { border-left-color: var(--color-warning); }
.stat-tile--called { border-left-color: var(--color-info); }
.stat-tile--completed { border-left-color: var(--color-success); }
.stat-tile--cancelled { border-left-color: var(--color-danger); }

.reset-token-card summary { cursor: pointer; font-weight: 600; }
.reset-token-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 12px; }
.reset-token-form select { max-width: 240px; }

.current-patient-card {
    text-align: center;
    padding: 32px 24px;
    animation: fadeInUp 0.3s ease;
}
.current-patient-card__eyebrow { color: var(--color-text-muted); text-transform: uppercase; font-size: 0.76rem; letter-spacing: 0.05em; margin-bottom: 4px; }
.current-patient-card__token { font-size: 2.8rem; font-weight: 800; color: var(--color-primary-dark); margin: 0 0 8px; }
.current-patient-card__name { margin-bottom: 2px; }
.current-patient-card__meta { color: var(--color-text-muted); margin-bottom: 10px; }
.current-patient-card__reason { max-width: 480px; margin: 0 auto 14px; color: var(--color-text); }
.current-patient-card__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 20px; }
.current-patient-card__empty { color: var(--color-text-muted); padding: 20px 0; }

.next-patient-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    text-align: center;
}

/* ---------------- Modal (walk-in) ---------------- */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: flex-end; justify-content: center; }
.modal[hidden] { display: none; }
@media (min-width: 640px) { .modal { align-items: center; } }
.modal__backdrop { position: absolute; inset: 0; background: rgba(16, 24, 40, 0.5); animation: fadeIn 0.2s ease; }
.modal__panel {
    position: relative;
    width: 100%;
    max-width: 620px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    animation: slideUp 0.25s ease;
}
@media (min-width: 640px) { .modal__panel { border-radius: var(--radius-lg); animation: popIn 0.2s ease; } }
.modal__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal__close { background: none; border: none; font-size: 1.6rem; line-height: 1; cursor: pointer; color: var(--color-text-muted); }
body.modal-open { overflow: hidden; }

/* ---------------- Toasts ---------------- */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    left: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-end;
    pointer-events: none;
}
@media (min-width: 640px) { .toast-container { left: auto; } }
.toast {
    pointer-events: auto;
    background: var(--color-text);
    color: #fff;
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base);
    max-width: 320px;
}
.toast--visible { opacity: 1; transform: translateY(0); }
.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-danger); }

/* ---------------- Animations ---------------- */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes popIn { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }

/* ---------------- Offline banner ---------------- */
.offline-banner {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    text-align: center;
    padding: 8px;
    font-size: 0.82rem;
}

/* ---------------- Print ---------------- */
.print-only { display: none; }
@media print {
    .site-header, .site-footer, .install-app-btn, .toast-container,
    .page-heading__actions, .form-card, .filter-card, .next-patient-bar,
    .current-patient-card__actions, .row-actions, .modal { display: none !important; }

    body * { visibility: hidden; }
    .print-only, .print-only * { visibility: visible; }
    .print-only { display: block; position: fixed; inset: 0; padding: 32px; }

    .print-token { text-align: center; font-family: var(--font-body); }
    .print-token__label { font-size: 1rem; color: #555; margin-bottom: 4px; }
    .print-token__value { font-size: 3rem; font-weight: 800; margin: 0 0 16px; }
}