/* =====================================================
   Sunshine Dental Clinic — Front-end-only Demo
   Same design system as the full PHP build, plus
   view-transition animations for a convincing showcase.
   ===================================================== */

:root {
    --ink:          #16302E;
    --ink-soft:     #4A6663;
    --paper:        #F7FAFA;
    --paper-raised: #FFFFFF;
    --line:         #DCE7E5;

    --teal:         #0F6E6E;
    --teal-dark:    #0A4F4F;
    --teal-tint:    #E4F1F0;

    --coral:        #FF8A65;
    --coral-dark:   #E86B44;

    --amber:        #E8A73B;
    --amber-tint:   #FDF3E1;
    --blue:         #3B82C4;
    --blue-tint:    #E7F0FA;
    --green:        #3FA796;
    --green-tint:   #E6F5F2;
    --red:          #D64550;
    --red-tint:     #FBEAEC;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-soft: 0 4px 20px rgba(15, 110, 110, 0.08);
    --shadow-raised: 0 10px 30px rgba(15, 110, 110, 0.14);

    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 880px; margin: 0 auto; padding: 0 20px; }
a { color: inherit; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0 0 8px; }

/* ---------- Demo ribbon ---------- */
.demo-ribbon {
    background: var(--teal-dark);
    color: #fff;
    text-align: center;
    font-size: 12.5px;
    font-weight: 600;
    padding: 8px 16px;
    letter-spacing: 0.02em;
}

.demo-ribbon a { color: #9FE0D6; text-decoration: underline; }

/* ---------- Header ---------- */
.site-header { background: var(--paper-raised); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-icon { font-size: 24px; background: var(--teal-tint); width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 50%; }
.brand-text { font-family: var(--font-display); font-weight: 600; font-size: 20px; letter-spacing: -0.01em; }
.brand-text span { color: var(--teal); }
.header-phone { font-size: 14px; font-weight: 600; color: var(--teal-dark); background: var(--teal-tint); padding: 8px 14px; border-radius: 999px; }

/* ---------- Main / Hero ---------- */
.site-main { padding: 40px 0 80px; }

.hero { position: relative; text-align: center; padding: 28px 20px 8px; overflow: hidden; }
.hero::before {
    content: "";
    position: absolute; top: -60px; right: -60px; width: 220px; height: 220px;
    background: radial-gradient(circle, var(--teal-tint) 0%, transparent 70%);
    z-index: -1;
}
.hero-eyebrow {
    display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--teal); background: var(--teal-tint); padding: 6px 14px; border-radius: 999px; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(28px, 5vw, 40px); color: var(--ink); max-width: 560px; margin-inline: auto; }
.hero p.lead { color: var(--ink-soft); font-size: 16px; max-width: 480px; margin: 10px auto 0; }

/* ---------- Step tracker ---------- */
.step-tracker { display: flex; justify-content: center; align-items: center; gap: 6px; margin: 30px auto 10px; max-width: 420px; }
.step-tracker .step { display: flex; align-items: center; gap: 8px; color: var(--ink-soft); font-size: 13px; font-weight: 600; transition: color .25s ease; }
.step-tracker .step .dot {
    width: 30px; height: 30px; border-radius: 50%; background: var(--paper-raised); border: 2px solid var(--line);
    display: flex; align-items: center; justify-content: center; font-family: var(--font-display);
    transition: background .25s ease, border-color .25s ease, transform .25s ease;
}
.step-tracker .step.active .dot, .step-tracker .step.done .dot { background: var(--teal); border-color: var(--teal); color: #fff; }
.step-tracker .step.active .dot { transform: scale(1.12); }
.step-tracker .step.active { color: var(--teal-dark); }
.step-tracker .track-line { width: 40px; height: 2px; background: var(--line); position: relative; overflow: hidden; }
.step-tracker .track-line::after {
    content: ""; position: absolute; inset: 0; background: var(--teal); transform: scaleX(0); transform-origin: left;
    transition: transform .35s ease;
}
.step-tracker .track-line.filled::after { transform: scaleX(1); }

/* ---------- Views / transitions ---------- */
.view { display: none; }
.view.active { display: block; animation: viewIn .4s ease both; }

@keyframes viewIn {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Cards ---------- */
.card { background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); padding: 28px; margin: 24px auto; max-width: 640px; }
.card h2 { font-size: 20px; margin-bottom: 4px; }
.card .card-subtitle { color: var(--ink-soft); font-size: 14px; margin-bottom: 20px; }

/* ---------- Treatment grid ---------- */
.treatment-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 16px 0 24px; }
.treatment-option {
    display: flex; align-items: center; gap: 10px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
    padding: 12px 14px; cursor: pointer; font-size: 14px; font-weight: 500;
    transition: border-color .15s ease, background .15s ease, transform .1s ease;
}
.treatment-option:hover { border-color: var(--teal); }
.treatment-option:active { transform: scale(0.98); }
.treatment-option input { accent-color: var(--teal); width: 17px; height: 17px; }
.treatment-option.checked { background: var(--teal-tint); border-color: var(--teal); color: var(--teal-dark); }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; }
label .req { color: var(--coral-dark); }

input[type="text"], input[type="email"], input[type="tel"], input[type="date"], select {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
    font-size: 15px; font-family: var(--font-body); background: var(--paper-raised); color: var(--ink);
    transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-tint); }

.field-error { color: var(--red); font-size: 12.5px; margin-top: 5px; display: none; }
.field-error.show { display: block; animation: shakeIn .3s ease; }
@keyframes shakeIn { 0%{transform:translateX(-4px);} 30%{transform:translateX(4px);} 60%{transform:translateX(-2px);} 100%{transform:translateX(0);} }

.gender-toggle { display: flex; gap: 10px; }
.gender-toggle label { flex: 1; border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 12px; text-align: center; cursor: pointer; font-weight: 600; color: var(--ink-soft); transition: border-color .15s ease, background .15s ease; }
.gender-toggle input { display: none; }
.gender-toggle label.selected { border-color: var(--teal); background: var(--teal-tint); color: var(--teal-dark); }

/* ---------- Availability indicator ---------- */
.availability-note { margin-top: 8px; font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 6px; min-height: 18px; }
.availability-note.ok { color: var(--green); }
.availability-note.low { color: var(--amber); }
.availability-note.full { color: var(--red); }
.availability-note.checking { color: var(--ink-soft); }

.spinner {
    width: 13px; height: 13px; border: 2px solid var(--line); border-top-color: var(--teal);
    border-radius: 50%; display: inline-block; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 26px;
    border-radius: 999px; font-weight: 600; font-size: 15px; border: none; cursor: pointer; text-decoration: none;
    transition: transform .12s ease, box-shadow .12s ease, background .15s ease; font-family: var(--font-body);
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--coral); color: #fff; box-shadow: 0 6px 18px rgba(255, 138, 101, 0.35); }
.btn-primary:hover { background: var(--coral-dark); }
.btn-secondary { background: var(--paper-raised); color: var(--teal-dark); border: 1.5px solid var(--line); }
.btn-secondary:hover { border-color: var(--teal); }
.btn-block { width: 100%; }
.btn-row { display: flex; gap: 12px; margin-top: 26px; }
.btn-row .btn { flex: 1; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b83641; }

/* ---------- Summary box ---------- */
.summary-box { background: var(--teal-tint); border-radius: var(--radius-md); padding: 18px 20px; margin-bottom: 22px; font-size: 14px; }
.summary-box dt { color: var(--teal-dark); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.03em; }
.summary-box dd { margin: 2px 0 12px; font-size: 15px; }
.summary-box dd:last-child { margin-bottom: 0; }

/* ---------- Success / state panel ---------- */
.state-panel { text-align: center; max-width: 520px; margin: 20px auto; }
.state-icon {
    width: 76px; height: 76px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 36px; margin: 0 auto 18px;
}
.state-icon.success { background: var(--green-tint); color: var(--green); animation: popIn .5s cubic-bezier(.34,1.56,.64,1) both; }
.state-icon.error { background: var(--red-tint); color: var(--red); animation: popIn .5s cubic-bezier(.34,1.56,.64,1) both; }
@keyframes popIn { from { transform: scale(0); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; text-transform: capitalize; }
.badge-blue { background: var(--blue-tint); color: var(--blue); }
.badge-red { background: var(--red-tint); color: var(--red); }

/* ---------- Loading overlay (simulated "saving") ---------- */
.loading-overlay {
    position: fixed; inset: 0; background: rgba(247,250,250,0.9); display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 14px; z-index: 200; opacity: 0; pointer-events: none;
    transition: opacity .2s ease;
}
.loading-overlay.show { opacity: 1; pointer-events: all; }
.loading-overlay .spinner-lg {
    width: 42px; height: 42px; border: 4px solid var(--line); border-top-color: var(--teal); border-radius: 50%;
    animation: spin .8s linear infinite;
}
.loading-overlay p { color: var(--ink-soft); font-weight: 600; font-size: 14px; margin: 0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 24px 0; text-align: center; color: var(--ink-soft); font-size: 13px; }
.footer-sub { margin-top: 4px; opacity: .7; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
    .treatment-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .card { padding: 20px; margin: 16px auto; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
    outline: 3px solid var(--coral); outline-offset: 2px;
}