/* ============================================================
   NAVIGATION — Dr. Kishor Tanir Dental Studio
   Light Premium Clinical Design | 2026
   
   Concept: Floating white navigation card below the header.
   Two zones: mint-tinted brand panel (left) + structured
   nav rows (right). No dark backgrounds. Clinical + calm.
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
    --nh-white:      #FFFFFF;
    --nh-surface:    #F5FAFA;
    --nh-mint:       #EDF8F6;
    --nh-ink:        #16303C;
    --nh-ink-2:      #3D6474;
    --nh-ink-3:      #7FA4B2;
    --nh-teal:       #1FA896;
    --nh-teal-soft:  rgba(31, 168, 150, 0.12);
    --nh-teal-light: rgba(31, 168, 150, 0.08);
    --nh-border:     rgba(22, 48, 60, 0.08);
    --nh-shadow:     0 4px 32px rgba(16, 36, 46, 0.10),
                     0 1px 4px  rgba(16, 36, 46, 0.06),
                     0 0 0 1px  rgba(16, 36, 46, 0.05);
    --nh-ease:       cubic-bezier(0.16, 1, 0.3, 1);
    --nh-ease-in:    cubic-bezier(0.7, 0, 0.84, 0);
}

html, body {
    overflow-x: hidden !important;
    max-width: 100vw !important;
    width: 100% !important;
    box-sizing: border-box;
}

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

/* ============================================================
   SITE HEADER
   ============================================================ */
.sh-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    width: 100%;
    max-width: 100vw;
    box-sizing: border-box;
    z-index: 900;
    height: 72px;
    display: flex;
    align-items: center;
    transition: height 0.4s var(--nh-ease);
}

/* Glass layer — transparent initially */
.sh-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(245, 250, 250, 0.96);
    backdrop-filter: blur(18px) saturate(1.3);
    -webkit-backdrop-filter: blur(18px) saturate(1.3);
    border-bottom: 1px solid var(--nh-border);
    opacity: 0;
    transition: opacity 0.38s ease;
    z-index: -1;
}

.sh-header--scrolled {
    height: 62px;
}

.sh-header--scrolled::before {
    opacity: 1;
}

/* Inner container */
.sh-header__inner {
    max-width: 1360px;
    width: 100%;
    margin: 0 auto;
    padding: 0 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

/* ── Logo ────────────────────────────────────────────────── */
.sh-header__logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-decoration: none;
    flex-shrink: 0;
}

.sh-header__logo-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.18rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--nh-ink);
    white-space: nowrap;
    line-height: 1;
    transition: color 0.2s ease;
}

.sh-header__logo-dot {
    color: var(--nh-teal);
}

.sh-header__logo-sub {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.57rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #1A4D62;
    line-height: 1;
}

.sh-header__logo:hover .sh-header__logo-name {
    color: var(--nh-teal);
}

/* ── Controls ────────────────────────────────────────────── */
.sh-header__controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Phone number link */
.sh-header__tel {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #10364C;
    text-decoration: none;
    padding: 7px 14px;
    border-radius: 50px;
    border: 1px solid rgba(16, 54, 76, 0.15);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 8px rgba(16, 54, 76, 0.05);
    transition: color 0.22s, border-color 0.22s, background 0.22s;
    white-space: nowrap;
}

.sh-header__tel i {
    font-size: 0.75rem;
    color: var(--nh-teal);
}

.sh-header__tel:hover {
    color: var(--nh-ink);
    border-color: rgba(31, 168, 150, 0.35);
    background: #FFFFFF;
}

/* Book Appointment — teal outline pill */
.sh-header__book {
    display: inline-flex;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: #0B6B60;
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 50px;
    border: 1.5px solid #0B6B60;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 8px rgba(16, 54, 76, 0.05);
    white-space: nowrap;
    transition: background 0.25s ease, color 0.25s ease, transform 0.2s var(--nh-ease),
                box-shadow 0.25s ease;
    letter-spacing: 0.01em;
}

.sh-header__book:hover {
    background: var(--nh-teal);
    color: var(--nh-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(31, 168, 150, 0.28);
}

/* ── Menu button — pill with 2 animated lines ────────────── */
.sh-header__menu-btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    background: var(--nh-white);
    border: 1px solid var(--nh-border);
    border-radius: 50px;
    padding: 9px 16px 9px 14px;
    cursor: pointer;
    color: var(--nh-ink);
    transition: border-color 0.22s, background 0.22s, box-shadow 0.22s;
    box-shadow: 0 1px 3px rgba(16, 36, 46, 0.06);
    flex-shrink: 0;
}

.sh-header__menu-btn:focus { outline: none; }

.sh-header__menu-btn:hover {
    border-color: rgba(31, 168, 150, 0.4);
    box-shadow: 0 2px 8px rgba(31, 168, 150, 0.12);
}

/* The 2-line icon */
.sh-menu-icon {
    width: 18px;
    height: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-shrink: 0;
    position: relative;
}

.sh-menu-bar {
    display: block;
    height: 1.5px;
    background: var(--nh-ink);
    border-radius: 2px;
    transform-origin: center;
    transition: transform 0.42s var(--nh-ease),
                opacity 0.28s ease,
                width 0.36s var(--nh-ease);
    width: 100%;
}

.sh-menu-bar--short { width: 60%; }

/* Hover: equalize */
.sh-header__menu-btn:hover .sh-menu-bar--short { width: 100%; }

/* Open: morph to compact centered X circle */
.sh-header__menu-btn.is-open {
    width: 38px !important;
    height: 38px !important;
    min-width: 38px !important;
    max-width: 38px !important;
    padding: 0 !important;
    justify-content: center !important;
    align-items: center !important;
    border-radius: 50% !important;
    gap: 0 !important;
    background: #FFFFFF !important;
    border: 1.5px solid rgba(31, 168, 150, 0.45) !important;
    box-shadow: 0 2px 8px rgba(16, 36, 46, 0.12) !important;
    transition: transform 0.25s var(--nh-ease), background 0.2s ease, border-color 0.2s ease;
    flex-shrink: 0 !important;
}

.sh-header__menu-btn.is-open:hover {
    background: #F0FAF8 !important;
    border-color: var(--nh-teal) !important;
    transform: rotate(90deg);
}

.sh-header__menu-btn.is-open .sh-menu-icon {
    width: 16px !important;
    height: 16px !important;
    margin: 0 !important;
    position: relative !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0 !important;
}

.sh-header__menu-btn.is-open .sh-menu-bar {
    width: 100% !important;
    position: absolute !important;
    top: 50% !important;
    left: 0 !important;
    margin-top: -0.75px !important;
    height: 1.8px !important;
    background: #10364C !important;
}

.sh-header__menu-btn.is-open .sh-menu-bar:nth-child(1) {
    transform: rotate(45deg) !important;
}

.sh-header__menu-btn.is-open .sh-menu-bar:nth-child(2) {
    transform: rotate(-45deg) !important;
}

/* "Menu" text label */
.sh-menu-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    line-height: 1;
    color: var(--nh-ink);
    transition: opacity 0.2s ease, color 0.2s ease;
}

.sh-header__menu-btn.is-open .sh-menu-label {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* ============================================================
   NAV PANEL — Light floating card
   
   Appears below the header. Two-zone layout:
   Left: brand/CTA zone (mint tint)
   Right: structured nav rows (white)
   ============================================================ */

/* Positioning wrapper — invisible, full-screen to capture scrim clicks */
.nav-panel {
    position: fixed;
    inset: 0;
    z-index: 850;
    pointer-events: none;
    visibility: hidden;
}

/* Soft scrim — very subtle, not dark */
.nav-panel__scrim {
    position: absolute;
    inset: 0;
    background: rgba(14, 28, 36, 0.18);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    transition: opacity 0.4s ease;
}

/* The floating card */
.nav-panel__card {
    position: absolute;
    top: calc(72px + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px) scale(0.985);
    width: min(calc(100% - 48px), 1120px);
    background: var(--nh-white);
    border-radius: 18px;
    box-shadow: var(--nh-shadow);
    display: flex;
    overflow: hidden;
    opacity: 0;
    transition: transform 0.46s var(--nh-ease),
                opacity 0.38s ease;
    will-change: transform, opacity;
    border: 1px solid var(--nh-border);
}

/* Update card top position when header shrinks */
.sh-header--scrolled ~ .nav-panel .nav-panel__card {
    top: calc(62px + 10px);
}

/* Open state */
.nav-panel.is-open {
    pointer-events: all;
    visibility: visible;
}

.nav-panel.is-open .nav-panel__scrim {
    opacity: 1;
}

.nav-panel.is-open .nav-panel__card {
    transform: translateX(-50%) translateY(0) scale(1);
    opacity: 1;
}

/* ── LEFT: Brand zone ────────────────────────────────────── */
.nav-panel__brand-zone {
    width: 320px;
    flex-shrink: 0;
    background: var(--nh-mint);
    border-right: 1px solid rgba(31, 168, 150, 0.12);
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Large stacked wordmark */
.nav-panel__brand-wordmark {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    color: var(--nh-ink);
    line-height: 1.1;
}

.nav-panel__brand-dot { color: var(--nh-teal); }

.nav-panel__brand-desc {
    font-size: 0.82rem;
    line-height: 1.65;
    color: var(--nh-ink-2);
    margin: 0;
    font-weight: 400;
    max-width: 220px;
}

.nav-panel__brand-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: auto;
}

/* CTA button in left panel */
.nav-panel__cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--nh-white);
    text-decoration: none;
    background: var(--nh-teal);
    padding: 12px 18px;
    border-radius: 10px;
    border: 1.5px solid var(--nh-teal);
    transition: background 0.25s ease, transform 0.22s var(--nh-ease),
                box-shadow 0.25s ease;
    letter-spacing: 0.01em;
}

.nav-panel__cta-btn:hover {
    background: #178B7C;
    border-color: #178B7C;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(31, 168, 150, 0.3);
    color: var(--nh-white);
}

/* Phone in left panel */
.nav-panel__cta-tel {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--nh-ink-2);
    text-decoration: none;
    padding: 9px 16px;
    border-radius: 8px;
    border: 1px solid rgba(31, 168, 150, 0.2);
    background: rgba(255,255,255,0.6);
    transition: border-color 0.22s, color 0.22s, background 0.22s;
}

.nav-panel__cta-tel i { color: var(--nh-teal); font-size: 0.75rem; }

.nav-panel__cta-tel:hover {
    border-color: rgba(31, 168, 150, 0.5);
    color: var(--nh-ink);
    background: rgba(255,255,255,0.9);
}

/* ── RIGHT: Nav rows ─────────────────────────────────────── */
.nav-panel__nav {
    flex: 1;
    min-width: 0;
}

.nav-panel__list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-panel__item {
    border-bottom: 1px solid var(--nh-border);
    overflow: hidden;
}

.nav-panel__item:last-child { border-bottom: none; }

/* Each nav row */
.nav-panel__link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 28px;
    text-decoration: none;
    position: relative;
    transition: background 0.22s ease, padding-left 0.28s var(--nh-ease);
    /* Stagger animation base */
    transform: translateY(10px);
    opacity: 0;
    transition: transform 0.5s var(--nh-ease),
                opacity 0.5s var(--nh-ease),
                background 0.22s ease,
                padding-left 0.26s var(--nh-ease);
}

/* Teal left accent on hover */
.nav-panel__link::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--nh-teal);
    transform: scaleY(0);
    transform-origin: bottom;
    border-radius: 0 2px 2px 0;
    transition: transform 0.28s var(--nh-ease);
}

.nav-panel__link:hover::before { transform: scaleY(1); }

.nav-panel__link:hover {
    background: var(--nh-teal-light);
    padding-left: 34px;
}

/* Open → stagger links in */
.nav-panel.is-open .nav-panel__link {
    transform: translateY(0);
    opacity: 1;
}

.nav-panel.is-open .nav-panel__item:nth-child(1) .nav-panel__link { transition-delay: 0.10s; }
.nav-panel.is-open .nav-panel__item:nth-child(2) .nav-panel__link { transition-delay: 0.14s; }
.nav-panel.is-open .nav-panel__item:nth-child(3) .nav-panel__link { transition-delay: 0.18s; }
.nav-panel.is-open .nav-panel__item:nth-child(4) .nav-panel__link { transition-delay: 0.22s; }
.nav-panel.is-open .nav-panel__item:nth-child(5) .nav-panel__link { transition-delay: 0.26s; }
.nav-panel.is-open .nav-panel__item:nth-child(6) .nav-panel__link { transition-delay: 0.30s; }
.nav-panel.is-open .nav-panel__item:nth-child(7) .nav-panel__link { transition-delay: 0.34s; }
.nav-panel.is-open .nav-panel__item:nth-child(8) .nav-panel__link { transition-delay: 0.38s; }

/* Reset on close */
.nav-panel:not(.is-open) .nav-panel__link {
    transform: translateY(10px);
    opacity: 0;
    transition-delay: 0s !important;
    transition-duration: 0.15s !important;
}

/* Number */
.nav-panel__link-num {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.62rem;
    font-weight: 700;
    color: var(--nh-teal);
    letter-spacing: 0.06em;
    opacity: 0.6;
    min-width: 20px;
    align-self: flex-start;
    padding-top: 3px;
    transition: opacity 0.22s;
    flex-shrink: 0;
}

.nav-panel__link:hover .nav-panel__link-num { opacity: 1; }

/* Body: name + description */
.nav-panel__link-body {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.nav-panel__link-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.02rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--nh-ink);
    line-height: 1.2;
    transition: color 0.22s;
}

.nav-panel__link:hover .nav-panel__link-name { color: var(--nh-teal); }

.nav-panel__link.is-active .nav-panel__link-name { color: var(--nh-teal); }

.nav-panel__link-desc {
    font-size: 0.72rem;
    color: var(--nh-ink-3);
    font-weight: 400;
    line-height: 1;
}

/* Arrow */
.nav-panel__link-arrow {
    font-size: 0.9rem;
    color: var(--nh-teal);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.22s ease, transform 0.28s var(--nh-ease);
    flex-shrink: 0;
}

.nav-panel__link:hover .nav-panel__link-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet (<=1024px) — hide phone label, shrink card */
@media (max-width: 1024px) {
    .sh-header__tel span { display: none; }
    .sh-header__tel { padding: 7px 10px; }
    .nav-panel__brand-zone { width: 260px; padding: 32px 28px; }
    .nav-panel__brand-wordmark { font-size: 1.7rem; }
}

/* Tablet & Mobile (<=992px) — Ensure header never overflows, menu button is always crisp and visible */
@media (max-width: 992px) {
    .sh-header {
        height: 64px;
        width: 100%;
        max-width: 100vw;
    }
    .sh-header__inner {
        padding: 0 18px;
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .sh-header__tel {
        display: none;
    }
    .sh-header__controls {
        gap: 8px;
        flex-shrink: 0;
    }
    .sh-header__menu-btn:not(.is-open) {
        display: inline-flex !important;
        align-items: center;
        gap: 8px;
        padding: 8px 14px;
        background: var(--nh-white);
        border: 1.5px solid rgba(31, 168, 150, 0.5);
        box-shadow: 0 2px 8px rgba(16, 36, 46, 0.08);
        border-radius: 999px;
    }
    .sh-header__menu-btn:not(.is-open) .sh-menu-label {
        display: inline-block !important;
        font-size: 0.74rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--nh-ink);
    }
    .sh-header__menu-btn.is-open {
        width: 38px !important;
        height: 38px !important;
        min-width: 38px !important;
        max-width: 38px !important;
        padding: 0 !important;
        border-radius: 50% !important;
        gap: 0 !important;
        display: inline-flex !important;
        justify-content: center !important;
        align-items: center !important;
        flex-shrink: 0 !important;
    }
    .sh-header__menu-btn.is-open .sh-menu-label {
        display: none !important;
    }
    .nav-panel__card {
        flex-direction: column;
        border-radius: 14px;
        width: calc(100% - 24px);
        max-width: 480px;
        max-height: calc(100vh - 84px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        left: 50%;
        transform: translateX(-50%) translateY(-12px);
    }
    .nav-panel.is-open .nav-panel__card {
        transform: translateX(-50%) translateY(0);
    }
    .nav-panel__brand-zone {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(31, 168, 150, 0.12);
        padding: 20px 20px 16px;
        flex-direction: row;
        align-items: center;
        gap: 14px;
        flex-wrap: wrap;
    }
    .nav-panel__brand-wordmark { font-size: 1.15rem; }
    .nav-panel__brand-desc { display: none; }
    .nav-panel__brand-actions { margin-top: 0; flex-direction: row; }
    .nav-panel__link { padding: 13px 18px; }
    .nav-panel__link:hover { padding-left: 22px; }
}

/* Small Tablet & Mobile Screens (<=768px) */
@media (max-width: 768px) {
    .sh-header__inner {
        padding: 0 16px;
    }
    .sh-header__book {
        font-size: 0.78rem;
        padding: 7px 12px;
    }
}

/* Mobile Screens (<=576px) */
@media (max-width: 576px) {
    .sh-header {
        height: 60px;
    }
    .sh-header--scrolled {
        height: 54px;
    }
    .sh-header__inner {
        padding: 0 14px;
    }
    .sh-header__logo-name {
        font-size: 1.05rem;
    }
    .sh-header__logo-sub {
        font-size: 0.52rem;
    }
    .sh-header__book {
        display: none; /* Hide Book button on small mobile so logo & hamburger button have max room */
    }
    .sh-header__menu-btn:not(.is-open) {
        padding: 7px 13px;
        gap: 6px;
    }
    .sh-header__menu-btn:not(.is-open) .sh-menu-icon {
        width: 16px;
        height: 11px;
    }
    .sh-header__menu-btn:not(.is-open) .sh-menu-label {
        display: inline-block !important;
        font-size: 0.72rem;
    }
    .sh-header__menu-btn.is-open {
        width: 38px !important;
        height: 38px !important;
        min-width: 38px !important;
        max-width: 38px !important;
        padding: 0 !important;
        border-radius: 50% !important;
        gap: 0 !important;
        display: inline-flex !important;
        justify-content: center !important;
        align-items: center !important;
        flex-shrink: 0 !important;
    }
    .sh-header__menu-btn.is-open .sh-menu-label {
        display: none !important;
    }
    .nav-panel__card {
        top: calc(60px + 6px);
        width: calc(100% - 20px);
    }
}