/*
Theme Name: KARADA整骨院
Theme URI: https://karada-seikotsuin.example.com
Author: NextCatalyst LLC
Author URI: https://nextcatalyst.example.com
Description: A clean, warm custom theme for KARADA整骨院 — an osteopathic clinic in Sangenjaya, Tokyo. Built with ACF + custom templates.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: karada-seikotsuin
Tags: custom-theme, osteopathic-clinic, healthcare, clean-theme, acf
*/

/* ============================================================
   CSS Custom Properties
============================================================ */
:root {
    --ks-primary:        #2AABB3;
    --ks-primary-light:  #E8F6F7;
    --ks-primary-dark:   #1E8A91;
    --ks-accent-warm:    #F2994A;
    --ks-accent-warm-hover: #E0882F;
    --ks-bg:             #FFFFFF;
    --ks-bg-off:         #FAFBFC;
    --ks-bg-warm:        #F5F3F0;
    --ks-text:           #333840;
    --ks-text-muted:     #7A838F;
    --ks-border:         rgba(0, 0, 0, 0.08);
    --ks-success:        #27AE60;
    --ks-radius-sm:      8px;
    --ks-radius-md:      12px;
    --ks-radius-lg:      16px;
    --ks-radius-xl:      20px;
    --ks-radius-full:    50px;
    --ks-shadow-card:    0 4px 24px rgba(0, 0, 0, 0.06);
    --ks-shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.1);
    --ks-shadow-soft:    0 2px 12px rgba(0, 0, 0, 0.04);
    --ks-transition:     0.3s ease;
    --ks-container:      1100px;
    --ks-header-height:  72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--ks-header-height) + 16px);
    font-size: 16px;
}

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'YuGothic', 'Yu Gothic', sans-serif;
    background-color: var(--ks-bg);
    color: var(--ks-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--ks-transition);
}

ul {
    list-style: none;
}

/* ============================================================
   Typography
============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.01em;
    color: var(--ks-text);
}

h1 { font-size: clamp(1.75rem, 4.5vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }

p {
    line-height: 1.8;
}

/* ============================================================
   Layout Utilities
============================================================ */
.ks-container {
    width: 100%;
    max-width: var(--ks-container);
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

.ks-container--narrow {
    max-width: 760px;
}

.ks-container--wide {
    max-width: 1280px;
}

.ks-section {
    padding: 96px 0;
}

.ks-section--sm {
    padding: 64px 0;
}

.ks-section--bg-off {
    background: var(--ks-bg-off);
}

.ks-section--bg-warm {
    background: var(--ks-bg-warm);
}

.ks-section--bg-primary-light {
    background: var(--ks-primary-light);
}

.ks-section-header {
    text-align: center;
    margin-bottom: 56px;
}

.ks-section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--ks-primary);
    margin-bottom: 12px;
}

.ks-section-header h2 {
    margin-bottom: 16px;
}

.ks-section-header p {
    color: var(--ks-text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================================
   Header
============================================================ */
.ks-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--ks-header-height);
    display: flex;
    align-items: center;
    transition: background var(--ks-transition), box-shadow var(--ks-transition), backdrop-filter var(--ks-transition);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.ks-header.is-scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.ks-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--ks-container);
    margin: 0 auto;
    padding: 0 24px;
}

.ks-header__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ks-text);
}

.ks-header__logo .ks-logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--ks-primary), var(--ks-primary-dark));
    color: #fff;
    border-radius: var(--ks-radius-sm);
    font-size: 1.1rem;
}

.ks-header__logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.ks-header__logo-main {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--ks-text);
}

.ks-header__logo-sub {
    font-size: 0.625rem;
    font-weight: 500;
    color: var(--ks-text-muted);
    letter-spacing: 0.05em;
}

.ks-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ks-nav a {
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ks-text-muted);
    border-radius: var(--ks-radius-sm);
    transition: color var(--ks-transition), background var(--ks-transition);
}

.ks-nav a:hover {
    color: var(--ks-primary);
    background: var(--ks-primary-light);
}

.ks-nav a.is-current {
    color: var(--ks-primary);
    font-weight: 700;
}

.ks-header__cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--ks-accent-warm);
    color: #fff !important;
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: var(--ks-radius-full);
    transition: background var(--ks-transition), transform var(--ks-transition), box-shadow var(--ks-transition);
}

.ks-header__cta:hover {
    background: var(--ks-accent-warm-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(242, 153, 74, 0.35);
}

.ks-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
    color: var(--ks-text);
}

.ks-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform var(--ks-transition), opacity var(--ks-transition);
}

.ks-hamburger.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.ks-hamburger.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Mobile Nav Overlay
============================================================ */
.ks-mobile-nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding-top: var(--ks-header-height);
}

.ks-mobile-nav.is-open {
    display: flex;
}

.ks-mobile-nav a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ks-text);
    padding: 12px 24px;
    border-radius: var(--ks-radius-sm);
    transition: color var(--ks-transition), background var(--ks-transition);
}

.ks-mobile-nav a:hover {
    color: var(--ks-primary);
    background: var(--ks-primary-light);
}

.ks-mobile-nav .ks-btn {
    margin-top: 16px;
}

/* ============================================================
   Footer
============================================================ */
.ks-footer {
    background: var(--ks-text);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 32px;
}

.ks-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.ks-footer__brand .ks-footer__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.ks-footer__brand .ks-footer__logo .ks-logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--ks-primary);
    color: #fff;
    border-radius: var(--ks-radius-sm);
    font-size: 1rem;
}

.ks-footer__brand p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.7;
    margin-bottom: 20px;
}

.ks-footer__social {
    display: flex;
    gap: 12px;
}

.ks-footer__social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--ks-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.9rem;
    transition: all var(--ks-transition);
}

.ks-footer__social a:hover {
    border-color: var(--ks-primary);
    color: var(--ks-primary);
    background: rgba(42, 171, 179, 0.1);
}

.ks-footer__col h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.ks-footer__col ul li {
    margin-bottom: 10px;
}

.ks-footer__col ul li a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.55);
    transition: color var(--ks-transition);
}

.ks-footer__col ul li a:hover {
    color: var(--ks-primary);
}

.ks-footer__col .ks-footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 12px;
}

.ks-footer__col .ks-footer__contact-item i {
    color: var(--ks-primary);
    margin-top: 3px;
    flex-shrink: 0;
}

.ks-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.ks-footer__bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
}

.ks-footer__bottom-links {
    display: flex;
    gap: 20px;
}

.ks-footer__bottom-links a {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
    transition: color var(--ks-transition);
}

.ks-footer__bottom-links a:hover {
    color: var(--ks-primary);
}

/* ============================================================
   Buttons
============================================================ */
.ks-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 0.9375rem;
    font-weight: 700;
    border-radius: var(--ks-radius-full);
    cursor: pointer;
    transition: all var(--ks-transition);
    border: 2px solid transparent;
    line-height: 1;
    white-space: nowrap;
    font-family: inherit;
}

.ks-btn--primary {
    background: var(--ks-accent-warm);
    color: #fff;
    border-color: var(--ks-accent-warm);
}

.ks-btn--primary:hover {
    background: var(--ks-accent-warm-hover);
    border-color: var(--ks-accent-warm-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(242, 153, 74, 0.35);
    color: #fff;
}

.ks-btn--outline {
    background: transparent;
    color: var(--ks-primary);
    border-color: var(--ks-primary);
}

.ks-btn--outline:hover {
    background: var(--ks-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(42, 171, 179, 0.25);
}

.ks-btn--outline-white {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.ks-btn--outline-white:hover {
    background: #fff;
    color: var(--ks-primary);
    border-color: #fff;
}

.ks-btn--white {
    background: #fff;
    color: var(--ks-accent-warm);
    border-color: #fff;
}

.ks-btn--white:hover {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.ks-btn--lg {
    padding: 18px 48px;
    font-size: 1rem;
}

.ks-btn--sm {
    padding: 10px 24px;
    font-size: 0.8125rem;
}

.ks-btn--full {
    width: 100%;
}

/* ============================================================
   Cards
============================================================ */
.ks-card {
    background: #fff;
    border: 1px solid var(--ks-border);
    border-radius: var(--ks-radius-lg);
    padding: 36px 28px;
    transition: all var(--ks-transition);
}

.ks-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--ks-shadow-card-hover);
}

.ks-card--featured {
    border: 2px solid var(--ks-primary);
    box-shadow: 0 0 0 4px rgba(42, 171, 179, 0.08);
}

.ks-card--featured:hover {
    box-shadow: 0 0 0 4px rgba(42, 171, 179, 0.12), var(--ks-shadow-card-hover);
}

/* ============================================================
   Headings
============================================================ */
.ks-heading {
    color: var(--ks-text);
    font-weight: 700;
}

.ks-heading--primary {
    color: var(--ks-primary);
}

.ks-heading--white {
    color: #fff;
}

/* ============================================================
   Page Header (inner pages)
============================================================ */
.ks-page-header {
    padding-top: calc(var(--ks-header-height) + 48px);
    padding-bottom: 64px;
    background:
        linear-gradient(135deg, rgba(232, 246, 247, 0.93) 0%, rgba(240, 250, 251, 0.9) 50%, rgba(255, 255, 255, 0.92) 100%),
        url('./assets/images/reception.jpg') center / cover no-repeat;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ks-page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 80%, rgba(42, 171, 179, 0.06) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(242, 153, 74, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.ks-page-header__label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(42, 171, 179, 0.1);
    color: var(--ks-primary);
    border: 1px solid rgba(42, 171, 179, 0.2);
    padding: 6px 16px;
    border-radius: var(--ks-radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
    position: relative;
}

.ks-page-header h1 {
    margin-bottom: 16px;
    position: relative;
}

.ks-page-header p {
    color: var(--ks-text-muted);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto;
    position: relative;
}

/* ============================================================
   Scroll Animation
============================================================ */
.ks-animate {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.ks-animate.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.ks-animate--left {
    opacity: 0;
    transform: translateX(-28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.ks-animate--left.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.ks-animate--right {
    opacity: 0;
    transform: translateX(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.ks-animate--right.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.ks-animate-delay-1 { transition-delay: 0.1s; }
.ks-animate-delay-2 { transition-delay: 0.2s; }
.ks-animate-delay-3 { transition-delay: 0.3s; }
.ks-animate-delay-4 { transition-delay: 0.4s; }
.ks-animate-delay-5 { transition-delay: 0.5s; }

/* ============================================================
   CTA Section
============================================================ */
.ks-cta-section {
    background:
        linear-gradient(135deg, rgba(42, 171, 179, 0.93) 0%, rgba(30, 130, 136, 0.93) 100%),
        url('./assets/images/treatment-room.jpg') center / cover no-repeat;
    padding: 96px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ks-cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(255, 255, 255, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.ks-cta-section h2 {
    color: #fff;
    margin-bottom: 16px;
    position: relative;
}

.ks-cta-section p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
    margin-bottom: 40px;
    position: relative;
}

.ks-cta-section .ks-cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

.ks-cta-section .ks-cta-note {
    margin-top: 48px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    position: relative;
}

/* ============================================================
   Badge
============================================================ */
.ks-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--ks-radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.ks-badge--primary {
    background: var(--ks-primary-light);
    color: var(--ks-primary);
}

.ks-badge--warm {
    background: rgba(242, 153, 74, 0.12);
    color: var(--ks-accent-warm);
}

.ks-badge--popular {
    background: var(--ks-accent-warm);
    color: #fff;
}

/* ============================================================
   Accessibility
============================================================ */
:focus-visible {
    outline: 2px solid var(--ks-primary);
    outline-offset: 3px;
}

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

/* ============================================================
   Responsive
============================================================ */
@media (max-width: 1024px) {
    .ks-footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --ks-header-height: 64px;
    }

    .ks-section {
        padding: 72px 0;
    }

    .ks-nav,
    .ks-header__cta {
        display: none;
    }

    .ks-hamburger {
        display: flex;
    }

    .ks-footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .ks-footer__bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .ks-section {
        padding: 56px 0;
    }

    .ks-container {
        padding-left: 16px;
        padding-right: 16px;
    }
}