/* ========================================
   HK Nails & Spa — Custom Styles
   Charcoal + Coral · Editorial Design
   ======================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Palette */
    --color-charcoal:       #2D2D2D;
    --color-charcoal-deep:  #1A1A1A;
    --color-charcoal-soft:  #3D3D3D;
    --color-coral:          #E86A5B;
    --color-coral-dark:     #C44D3E;
    --color-coral-light:    #F2A094;
    --color-cream:          #FAF7F5;
    --color-warm-white:     #FFFBFA;
    --color-sand:           #F0E8E3;
    --color-text:           #2D2D2D;
    --color-text-light:     #6B6B6B;
    --color-text-inverse:   #FAF7F5;
    --color-border:         #E8E0DB;
    --color-border-light:   #F0E8E3;

    /* Typography */
    --font-serif:   'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs:   0.5rem;
    --space-sm:   1rem;
    --space-md:   1.5rem;
    --space-lg:   2.5rem;
    --space-xl:   4rem;
    --space-2xl:  6rem;
    --space-3xl:  8rem;

    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-warm-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

address {
    font-style: normal;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.15;
    color: var(--color-charcoal);
}

/* ---------- Eyebrow ---------- */
.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-coral);
    margin-bottom: var(--space-sm);
}

/* ---------- Section Title ---------- */
.section-title {
    font-size: clamp(2rem, 4vw, 3.25rem);
    margin-bottom: var(--space-md);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 560px;
    line-height: 1.7;
}

.section-header--centered {
    text-align: center;
}

.section-header--centered .section-eyebrow {
    text-align: center;
}

.section-header--centered .section-desc {
    margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-coral);
    color: var(--color-text-inverse);
}

.btn--primary:hover,
.btn--primary:focus-visible {
    background-color: var(--color-coral-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(232, 106, 91, 0.35);
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-charcoal);
    border: 1.5px solid var(--color-charcoal);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
    background-color: var(--color-charcoal);
    color: var(--color-text-inverse);
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* ========== NAVIGATION ========== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(250, 247, 245, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    height: var(--nav-height);
    transition: box-shadow var(--transition-base);
}

.nav.scrolled {
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.nav__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav__logo-mark {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-coral);
    background-color: var(--color-charcoal);
    padding: 0.3rem 0.55rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.nav__logo-text {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-charcoal);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--color-coral);
    transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link:focus-visible {
    color: var(--color-charcoal);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
    width: 100%;
}

.nav__link--cta {
    background-color: var(--color-coral);
    color: var(--color-text-inverse) !important;
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover {
    background-color: var(--color-coral-dark);
    color: var(--color-text-inverse) !important;
}

/* Mobile nav toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    z-index: 1001;
}

.nav__toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-charcoal);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== HERO ========== */
.hero {
    min-height: 100vh;
    padding-top: var(--nav-height);
    background-color: var(--color-cream);
    overflow: hidden;
}

.hero__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: calc(100vh - var(--nav-height));
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0;
}

.hero__content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl) var(--space-xl) var(--space-3xl) var(--space-xl);
}

.hero__eyebrow {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-coral);
    margin-bottom: var(--space-md);
}

.hero__headline {
    font-size: clamp(2.5rem, 5vw, 4.25rem);
    font-weight: 700;
    line-height: 1.08;
    color: var(--color-charcoal);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.hero__headline em {
    font-style: italic;
    color: var(--color-coral);
}

.hero__sub {
    font-size: 1.1rem;
    line-height: 1.75;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    max-width: 480px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.hero__trust {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-xs);
}

.hero__trust-item {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-weight: 400;
}

.hero__trust-dot {
    color: var(--color-coral-light);
    font-size: 1.2rem;
    line-height: 1;
}

.hero__image {
    position: relative;
    overflow: hidden;
}

.hero__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__image-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30%;
    background: linear-gradient(to top, rgba(45, 45, 45, 0.15), transparent);
    pointer-events: none;
}

/* ========== SERVICES ========== */
.services {
    padding: var(--space-3xl) 0;
    background-color: var(--color-warm-white);
}

.services .section-header {
    margin-bottom: var(--space-xl);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.card {
    background-color: var(--color-cream);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.card__img-wrap {
    overflow: hidden;
    aspect-ratio: 3 / 2;
}

.card__img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card__img-wrap img {
    transform: scale(1.04);
}

.card__body {
    padding: var(--space-md);
}

.card__title {
    font-size: 1.35rem;
    margin-bottom: var(--space-xs);
}

.card__text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* ========== ABOUT ========== */
.about {
    padding: var(--space-3xl) 0;
    background-color: var(--color-charcoal);
    color: var(--color-text-inverse);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.about__images {
    position: relative;
}

.about__img-main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 5 / 6;
}

.about__img-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about__img-secondary {
    position: absolute;
    bottom: -40px;
    right: -40px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 6px solid var(--color-charcoal);
    aspect-ratio: 4 / 3;
    max-width: 260px;
}

.about__img-secondary img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about__img-accent {
    position: absolute;
    top: -20px;
    left: -20px;
    width: 120px;
    height: 120px;
    background-color: var(--color-coral);
    border-radius: var(--radius-lg);
    z-index: -1;
    opacity: 0.15;
}

.about__content {
    padding: var(--space-lg) 0;
}

.about__content .section-title {
    color: var(--color-text-inverse);
}

.about__text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(250, 247, 245, 0.75);
    margin-bottom: var(--space-md);
}

.about__stats {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(250, 247, 245, 0.12);
}

.stat__number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-coral);
    line-height: 1;
    margin-bottom: 0.35rem;
}

.stat__label {
    font-size: 0.8rem;
    color: rgba(250, 247, 245, 0.6);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 500;
}

.stat__divider {
    width: 1px;
    height: 48px;
    background-color: rgba(250, 247, 245, 0.15);
}

/* ========== GALLERY ========== */
.gallery {
    padding: var(--space-3xl) 0;
    background-color: var(--color-cream);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: 280px;
    gap: var(--space-sm);
}

.gallery__item {
    overflow: hidden;
    border-radius: var(--radius-md);
}

.gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery__item:hover img {
    transform: scale(1.04);
}

.gallery__item--wide {
    grid-column: span 6;
}

.gallery__item:not(.gallery__item--wide) {
    grid-column: span 3;
}

/* ========== HOURS ========== */
.hours {
    padding: var(--space-3xl) 0;
    background-color: var(--color-warm-white);
}

.hours__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.hours__info {
    padding-right: var(--space-lg);
}

.hours__info .section-title {
    margin-bottom: var(--space-lg);
}

.hours__address {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.hours__address svg {
    flex-shrink: 0;
    margin-top: 0.2rem;
    color: var(--color-coral);
}

.hours__schedule {
    margin-bottom: var(--space-lg);
}

.hours__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.95rem;
}

.hours__day {
    color: var(--color-text);
    font-weight: 500;
}

.hours__time {
    color: var(--color-text-light);
}

.hours__contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.hours__phone,
.hours__email {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: var(--color-charcoal);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.hours__phone:hover,
.hours__email:hover {
    color: var(--color-coral);
}

.hours__map {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    aspect-ratio: 4 / 3;
}

.hours__map iframe {
    width: 100%;
    height: 100%;
}

/* ========== CONTACT ========== */
.contact {
    padding: var(--space-3xl) 0;
    background-color: var(--color-sand);
}

.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact__text {
    padding-top: var(--space-sm);
}

.contact__text .section-title {
    margin-bottom: var(--space-sm);
}

.contact__desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.contact__form {
    background-color: var(--color-warm-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form__group {
    margin-bottom: var(--space-md);
}

.form__label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.4rem;
    letter-spacing: 0.02em;
}

.form__input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--color-text);
    background-color: var(--color-cream);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form__input::placeholder {
    color: var(--color-text-light);
    opacity: 0.7;
}

.form__input:focus {
    border-color: var(--color-coral);
    box-shadow: 0 0 0 3px rgba(232, 106, 91, 0.12);
}

.form__select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B6B6B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__success {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--space-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: #1a7a3a;
    background-color: rgba(26, 122, 58, 0.06);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
}

/* ========== FOOTER ========== */
.footer {
    background-color: var(--color-charcoal-deep);
    color: var(--color-text-inverse);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(250, 247, 245, 0.1);
}

.footer__logo-mark {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-coral);
    background-color: var(--color-charcoal-soft);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.footer__logo-text {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.footer__tagline {
    margin-top: var(--space-sm);
    font-size: 0.9rem;
    color: rgba(250, 247, 245, 0.55);
    line-height: 1.7;
    max-width: 300px;
}

.footer__heading {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-coral-light);
    margin-bottom: var(--space-md);
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer__list a {
    font-size: 0.9rem;
    color: rgba(250, 247, 245, 0.6);
    transition: color var(--transition-fast);
}

.footer__list a:hover {
    color: var(--color-text-inverse);
}

.footer__addr {
    font-size: 0.9rem;
    color: rgba(250, 247, 245, 0.6);
    line-height: 1.8;
}

.footer__addr a {
    color: rgba(250, 247, 245, 0.6);
    transition: color var(--transition-fast);
}

.footer__addr a:hover {
    color: var(--color-coral-light);
}

.footer__bottom {
    padding-top: var(--space-lg);
    text-align: center;
}

.footer__bottom p {
    font-size: 0.8rem;
    color: rgba(250, 247, 245, 0.35);
}

/* ========== SCROLL REVEAL (progressive enhancement) ========== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

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

/* Tablet */
@media (max-width: 1024px) {
    .hero__grid {
        grid-template-columns: 1fr;
    }

    .hero__content {
        padding: var(--space-2xl) var(--space-lg);
        order: 2;
    }

    .hero__image {
        order: 1;
        min-height: 50vh;
    }

    .hero__img {
        object-fit: cover;
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about__grid {
        grid-template-columns: 1fr;
    }

    .about__images {
        max-width: 480px;
    }

    .about__img-secondary {
        right: -20px;
        bottom: -20px;
    }

    .hours__grid {
        grid-template-columns: 1fr;
    }

    .hours__info {
        padding-right: 0;
    }

    .contact__inner {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: 0;
        width: min(320px, 85vw);
        height: 100vh;
        height: 100dvh;
        background-color: var(--color-warm-white);
        flex-direction: column;
        justify-content: center;
        gap: var(--space-md);
        padding: var(--space-xl);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
    }

    .nav__menu.open {
        transform: translateX(0);
    }

    .nav__link {
        font-size: 1.1rem;
    }

    .nav__overlay {
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.4);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
    }

    .nav__overlay.active {
        opacity: 1;
        pointer-events: all;
    }

    .hero__content {
        padding: var(--space-xl) var(--space-md);
    }

    .hero__headline {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero__sub {
        font-size: 1rem;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        justify-content: center;
    }

    .services__grid {
        grid-template-columns: 1fr;
    }

    .gallery__grid {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: 200px;
    }

    .gallery__item--wide {
        grid-column: span 2;
    }

    .gallery__item:not(.gallery__item--wide) {
        grid-column: span 1;
    }

    .form__row {
        grid-template-columns: 1fr;
    }

    .about__stats {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .stat__divider {
        width: 48px;
        height: 1px;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .hours__map {
        aspect-ratio: 16 / 9;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .hero__trust {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .hero__trust-dot {
        display: none;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: no-preference) {
    /* Animations handled by JS */
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}