/* ============================================================
   MERIDIAN ACUPUNCTURE — Shared Stylesheet
   ============================================================ */

/* CSS Custom Properties */
:root {
    --color-primary: #AA0D11;
    --color-primary-dark: #820009;
    --color-ink: #1C1714;
    --color-bg: #FAF7F4;
    --color-bg-warm: #F0EAE2;
    --color-bg-deep: #2A1F1A;
    --color-stone: #C4B5A5;
    --color-white: #FFFFFF;
    --color-footer: #1a1210;

    --font-serif: 'Cormorant Garamond', serif;
    --font-body: 'Lato', sans-serif;
    --font-nav: 'Raleway', sans-serif;
    --font-chinese: 'Noto Serif SC', serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-ink);
    background-color: var(--color-bg);
    line-height: 1.6;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-primary-dark);
}

button {
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: var(--font-nav);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.1em;
    font-size: 13px;
}

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

section {
    position: relative;
}

/* Navigation — transparent by default, white on .scrolled */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.4s ease;
    background-color: transparent;
}

nav.scrolled {
    background-color: var(--color-white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: color 0.4s ease;
}

.nav-logo a {
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.nav-logo-text {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-white);
    line-height: 1;
}

nav.scrolled .nav-logo-text {
    color: var(--color-ink);
}

.nav-logo-subtitle {
    font-family: var(--font-body);
    font-size: 9px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 4px;
}

nav.scrolled .nav-logo-subtitle {
    color: var(--color-ink);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-menu a {
    font-family: var(--font-nav);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.25s ease;
}

.nav-menu a:not(.nav-cta) {
    position: relative;
    padding-bottom: 2px;
}

.nav-menu a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width 0.25s ease;
}

.nav-menu a:not(.nav-cta):hover::after {
    width: 100%;
}

nav.scrolled .nav-menu a {
    color: var(--color-ink);
}

nav.scrolled .nav-menu .nav-cta,
nav.scrolled .nav-menu .nav-cta:hover {
    color: var(--color-white);
}

/* Transparent nav hover: stay white so it's readable on the dark hero */
.nav-menu a:not(.nav-cta):hover {
    color: var(--color-white);
}

/* Scrolled nav hover: switch to red */
nav.scrolled .nav-menu a:not(.nav-cta):hover {
    color: var(--color-primary);
}

.nav-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 12px 28px;
    border-radius: 2px;
    margin-left: 20px;
    transition: background-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.nav-menu .nav-cta,
.nav-menu .nav-cta:hover {
    color: var(--color-white);
}

.nav-cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(170, 13, 17, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all 0.3s ease;
}

nav.scrolled .hamburger span {
    background-color: var(--color-ink);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg-deep);
    z-index: 999;
    padding-top: 100px;
    padding-left: 40px;
    overflow-y: auto;
}

.mobile-menu.active {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.mobile-menu a {
    font-family: var(--font-nav);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-white);
}

/* Section Utilities */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-ink);
}

.section-divider {
    width: 60px;
    height: 1px;
    background-color: var(--color-primary);
    margin: 0 auto 30px;
}

.section-intro {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--color-ink);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Form Structure — light background defaults */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-row.full {
    grid-template-columns: 1fr;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: var(--font-nav);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-ink);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 1px solid var(--color-stone);
    background-color: var(--color-white);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 14px;
    border-radius: 0;
}

.form-group input::placeholder,
.form-group select::placeholder,
.form-group textarea::placeholder {
    color: rgba(28, 23, 20, 0.5);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: inset 0 0 0 1px var(--color-primary);
}

.form-group select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231C1714' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
    cursor: pointer;
}

.form-group select option {
    background-color: var(--color-white);
    color: var(--color-ink);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-submit {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 14px 32px;
    align-self: flex-start;
}

.form-submit:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(170, 13, 17, 0.3);
}

/* Footer */
footer {
    background-color: var(--color-footer);
    color: var(--color-white);
    padding: 60px 40px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
}

.footer-section a {
    color: var(--color-primary);
}

.footer-logo {
    display: flex;
    flex-direction: column;
}

.footer-logo-text {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.15em;
    margin-bottom: 5px;
}

.footer-logo-subtitle {
    font-family: var(--font-body);
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 15px;
}

.footer-logo-tagline {
    font-family: var(--font-chinese);
    font-size: 18px;
    color: var(--color-primary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-family: var(--font-body);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
    font-family: var(--font-body);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    max-width: 1400px;
    margin: 0 auto;
}

/* Responsive — Shared */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

/* ── Service Link Cards (cross-linking component) ──────────── */
.service-link-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-stone);
    overflow: hidden;
    text-decoration: none;
    display: block;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-link-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* ── Scroll Reveal ─────────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.65s ease-out, transform 0.65s ease-out;
}

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

@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
}

.service-link-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.service-link-card-body {
    padding: 20px 24px;
}

.service-link-card-body h3 {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 10px;
}

.service-link-card-body p {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-ink);
    margin-bottom: 14px;
}

.service-link-card-label {
    font-family: var(--font-nav);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
}

@media (max-width: 768px) {
    nav {
        padding: 16px 20px;
    }

    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}