/**
 * ======================================================================
 * KITN Portal Web Site - Custom Stylesheet (style.css)
 * ======================================================================
 */

:root {
    --brand-red: #ef4444;       
    --brand-red-dark: #dc2626;  
    --brand-blue: #3b82f6;      
    --dark-bg: #f8fafc; /* ライトモードデフォルト背景（柔らかなオフホワイト） */
    --card-bg: rgba(15, 23, 42, 0.03); /* ライトモードカード背景 */
    --card-border: rgba(15, 23, 42, 0.08); /* ライトモードカード外枠 */
    --text-main: #0f172a; /* ライトモードメインテキスト（高いコントラスト比を確保） */
}

/* ダークテーマ適用時のCSS変数 */
.dark {
    --dark-bg: #030712;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
}

/* スクロールバーのカスタマイズ */
::-webkit-scrollbar { 
    width: 6px; 
}
::-webkit-scrollbar-track { 
    background: transparent; 
}
::-webkit-scrollbar-thumb { 
    background: rgba(239, 68, 68, 0.3); 
    border-radius: 10px; 
}
::-webkit-scrollbar-thumb:hover { 
    background: rgba(239, 68, 68, 0.7); 
}

/* ======================================================================
   【超強力スマホ防壁】リロード時の一瞬の崩れ・横揺れを完全に防ぐネイティブレイアウト
   ====================================================================== */
html, body {
    margin: 0;
    padding: 0;
    width: 100vw !important;
    max-width: 100vw !important;
    overflow-x: hidden !important;
    background-color: var(--dark-bg);
    color: var(--text-main);
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "palt";
}

body.loading, body.menu-open {
    overflow: hidden !important;
}

h1, h2, h3, h4, h5, h6 { 
    letter-spacing: -0.02em; 
    line-height: 1.3;
}
p {
    letter-spacing: 0.02em;
}

/* ======================================================================
   【FOUC完全防止】Tailwindがクラスを解釈する前に、非アクティブページをネイティブCSSで即座に非表示
   ====================================================================== */
.page {
    display: none !important; /* 初期状態ではすべてのページを完全に非表示 */
    min-height: calc(100vh - 80px);
    padding-top: 80px;
    width: 100%;
    max-width: 100% !important;
    overflow-x: hidden !important;
    box-sizing: border-box;
}

.page.active {
    display: block !important; /* アクティブな仮想ページのみを最優先で表示 */
    animation: pageFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pageFadeIn {
    from { 
        opacity: 0; 
        transform: translateY(12px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* グラスモーフィズムナビゲーションバー */
.glass-nav {
    background: rgba(248, 250, 252, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
    width: 100%;
    box-sizing: border-box;
}
.dark .glass-nav {
    background: rgba(3, 7, 18, 0.65);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

@media (min-width: 1024px) {
    .mobile-nav-toggle { display: none !important; }
    .desktop-nav { display: flex !important; }
    #mobile-menu { display: none !important; opacity: 0 !important; visibility: hidden !important; }
}
@media (max-width: 1023px) {
    .mobile-nav-toggle { display: flex !important; }
    .desktop-nav { display: none !important; }
}

/* ヒーロー背景グラデーション */
.hero-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 15% 20%, rgba(239, 68, 68, 0.08) 0%, transparent 45%),
                radial-gradient(circle at 85% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    animation: pulseGradient 12s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}
.dark .hero-gradient::before {
    background: radial-gradient(circle at 15% 20%, rgba(239, 68, 68, 0.12) 0%, transparent 45%),
                radial-gradient(circle at 85% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
}
@keyframes pulseGradient {
    0% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.08); }
    100% { opacity: 0.6; transform: scale(1); }
}

/* メッシュグリッド背景装飾 */
.grid-bg {
    background-image: linear-gradient(rgba(15, 23, 42, 0.02) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(15, 23, 42, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}
.dark .grid-bg {
    background-image: linear-gradient(rgba(255, 255, 255, 0.012) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
}

/* ======================================================================
   【鉄壁のフォールバック】Tailwindが未コンパイル状態でも絶対に崩れないCSS指定
   ====================================================================== */
#services-grid-container,
#about-grid-container,
#compliance-grid-container {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

@media (min-width: 768px) {
    #services-grid-container,
    #compliance-grid-container {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }
    #about-grid-container {
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    }
}

@media (min-width: 1024px) {
    #services-grid-container {
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    }
}

#achievements-list-container {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
    width: 100% !important;
}
@media (min-width: 768px) {
    #achievements-list-container {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }
}

/* インタラクティブカードデザイン */
.tech-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    border-radius: 1.5rem;
    box-sizing: border-box;
}
.tech-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
}

/* 【スマホの空振りバグ回避】PCでのみアニメーションを実行 */
@media (hover: hover) and (pointer: fine) {
    .tech-card:hover {
        border-color: rgba(239, 68, 68, 0.4);
        background: rgba(15, 23, 42, 0.05);
        transform: translateY(-6px);
        box-shadow: 0 22px 40px -12px rgba(239, 68, 68, 0.08);
    }
    .dark .tech-card:hover {
        background: rgba(255, 255, 255, 0.06);
        box-shadow: 0 22px 40px -12px rgba(239, 68, 68, 0.12);
    }
}

.hero-title { text-shadow: 0 10px 30px rgba(0,0,0,0.02); }
.dark .hero-title { text-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.logo-img { height: 32px; width: auto; object-fit: contain; }

nav a { position: relative; }
nav a.active:not(.rounded-full) { color: var(--brand-red); font-weight: 700; }
nav a.active:not(.rounded-full)::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background: var(--brand-red);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--brand-red);
}

.service-number {
    font-family: 'Inter', sans-serif;
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
    opacity: 0.05;
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 0;
    background: linear-gradient(135deg, #000, transparent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.dark .service-number {
    background: linear-gradient(135deg, #fff, transparent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* メディアアセットコンテナ */
.photo-container {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border-radius: 2rem;
    overflow: hidden;
    border: 1px solid var(--card-border);
    height: 100%;
    min-height: 350px;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 20px 40px -15px rgba(0,0,0,0.05);
}
.dark .photo-container { box-shadow: 0 20px 40px -15px rgba(0,0,0,0.5); }

.photo-slot {
    flex: 1;
    position: relative;
    background: rgba(15, 23, 42, 0.01);
    margin: 1.5rem;
    border-radius: 1.25rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.service-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0; left: 0;
    z-index: 10;
    animation: slowKenBurns 20s ease-in-out infinite;
}
@keyframes slowKenBurns {
    0% { transform: scale(1.05); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1.05); }
}

.img-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    font-size: 0.75rem;
    color: rgba(15,23,42,0.3);
    z-index: 1;
    letter-spacing: 0.05em;
}
.dark .img-fallback { color: rgba(255,255,255,0.3); }

/* トグルハンバーガーメニュー */
.hamburger { width: 30px; height: 20px; position: relative; cursor: pointer; z-index: 120; }
.hamburger span {
    display: block; position: absolute; height: 2px; width: 100%;
    background: #0f172a; border-radius: 9px; opacity: 1; left: 0;
    transform: rotate(0deg); transition: .25s ease-in-out;
}
.dark .hamburger span { background: #ffffff; }
.hamburger span:nth-child(1) { top: 0px; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { top: 18px; }
.hamburger.open span:nth-child(1) { top: 9px; transform: rotate(135deg); }
.hamburger.open span:nth-child(2) { opacity: 0; left: -60px; }
.hamburger.open span:nth-child(3) { top: 9px; transform: rotate(-135deg); }

/* モバイルドロワーメニュー */
#mobile-menu {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(248, 250, 252, 0.98); backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px); z-index: 100;
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 1.5rem; opacity: 0; visibility: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.dark #mobile-menu { background: rgba(3, 7, 18, 0.98); }
#mobile-menu.open { opacity: 1; visibility: visible; }

/* フォーム要素の統一デザイン */
input, select, textarea {
    background-color: rgba(15, 23, 42, 0.05) !important;
    color: #0f172a !important;
    transition: all 0.3s ease;
}
.dark input, .dark select, .dark textarea {
    background-color: #1e293b !important;
    color: #ffffff !important; 
    color-scheme: dark !important; 
}
input:focus, select:focus, textarea:focus {
    background-color: rgba(15, 23, 42, 0.08) !important;
    border-color: var(--brand-red) !important; outline: none;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}
.dark input:focus, .dark select:focus, .dark textarea:focus {
    background-color: #2d3748 !important;
}

input::placeholder, textarea::placeholder { color: #64748b !important; }
.dark input::placeholder, .dark textarea::placeholder { color: #94a3b8 !important; }
select.is-placeholder { color: #64748b !important; }
.dark select.is-placeholder { color: #94a3b8 !important; }

select option {
    background-color: #ffffff !important;
    color: #0f172a !important;
}
.dark select option {
    background-color: #1e293b !important;
    color: #ffffff !important;
}

/* 法務・ポリシー本文の段組みスタイリング */
.policy-content h4 {
    color: var(--brand-red); font-weight: 700; margin-top: 2.5rem;
    margin-bottom: 1rem; font-size: 1.2rem;
    border-bottom: 1px solid rgba(15,23,42,0.1); padding-bottom: 0.5rem;
}
.dark .policy-content h4 { border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.policy-content p, .policy-content li { font-size: 0.95rem; line-height: 1.8; color: #1e293b; margin-bottom: 1rem; }
.dark .policy-content p, .dark .policy-content li { color: #cbd5e1; }
.policy-content ul { padding-left: 1.5rem; list-style-type: disc; }

.back-button {
    display: inline-flex; align-items: center; color: #475569; font-size: 0.85rem; font-weight: 600;
    padding: 0.5rem 1rem; background: rgba(15, 23, 42, 0.05); border-radius: 2rem;
    transition: all 0.3s ease; border: 1px solid transparent;
}
.dark .back-button { color: #94a3b8; background: rgba(255, 255, 255, 0.05); }
.back-button:hover { 
    color: var(--brand-red); background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2); transform: translateX(-4px); 
}

.detail-header { margin-bottom: 3rem; border-bottom: 1px solid rgba(15,23,42,0.05); padding-bottom: 2.5rem; }
.dark .detail-header { border-bottom: 1px solid rgba(255, 255, 255, 0.05); }

/* アコーディオン・FAQ */
details[open] summary ~ * { animation: faqFadeIn 0.3s ease-out forwards; }
@keyframes faqFadeIn { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

/* AI チャットバルーン */
.ai-message { margin-bottom: 1.5rem; padding: 1.25rem 1.5rem; border-radius: 1.25rem; max-width: 85%; word-wrap: break-word; font-size: 0.95rem; line-height: 1.6; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05); position: relative; }
.dark .ai-message { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); }
.ai-message.bot { background: linear-gradient(135deg, rgba(241, 245, 249, 0.95) 0%, rgba(226, 232, 240, 0.95) 100%); margin-right: auto; border: 1px solid rgba(15, 23, 42, 0.05); border-bottom-left-radius: 0.25rem; color: #0f172a; }
.dark .ai-message.bot { background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.8) 100%); border: 1px solid rgba(255, 255, 255, 0.05); color: #f1f5f9; }
.ai-message.bot::before { content: '✨'; position: absolute; left: -1.5rem; top: 0; font-size: 1.2rem; }
.ai-message.user { background: linear-gradient(135deg, var(--brand-red) 0%, var(--brand-red-dark) 100%); margin-left: auto; border-bottom-right-radius: 0.25rem; color: white; }

/* ======================================================================
   KITN Brand Custom CSS
   ====================================================================== */
.text-gradient { background: linear-gradient(135deg, #0f172a 10%, #334155 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.dark .text-gradient { background: linear-gradient(135deg, #ffffff 10%, #94a3b8 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.text-champagne { background: linear-gradient(135deg, #ea580c 0%, #ca8a04 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.dark .text-champagne { background: linear-gradient(135deg, #fef08a 0%, #d97706 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.text-red-highlight { color: var(--brand-red); }

.btn-primary {
    background: linear-gradient(135deg, var(--brand-red) 0%, var(--brand-red-dark) 100%);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3), inset 0 1px 1px rgba(255, 255, 255, 0.2);
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    touch-action: manipulation;
}
.btn-champagne-outline {
    background: rgba(15, 23, 42, 0.03); border: 1px solid rgba(234, 88, 12, 0.4); color: #d97706;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02); transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1); touch-action: manipulation;
}
.dark .btn-champagne-outline { background: rgba(254, 240, 138, 0.03); border: 1px solid rgba(254, 240, 138, 0.3); color: #fef08a; }

/* 【PC環境のみホバー装飾有効化】 */
@media (hover: hover) and (pointer: fine) {
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(239, 68, 68, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.3); }
    .btn-champagne-outline:hover { border-color: transparent; background: linear-gradient(135deg, #ea580c 0%, #ca8a04 100%); color: #ffffff; transform: translateY(-3px); box-shadow: 0 12px 30px rgba(234, 88, 12, 0.25), inset 0 1px 1px rgba(255, 255, 255, 0.3); }
    .dark .btn-champagne-outline:hover { background: linear-gradient(135deg, #fef08a 0%, #d97706 100%); color: #451a03; box-shadow: 0 12px 30px rgba(217, 119, 6, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.4); }
}

@keyframes shake { 0%, 100% { transform: translateX(0); } 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }
.shake { animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both; }

/* ======================================================================
   Scroll Animation (Fade In Up)
   ====================================================================== */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); will-change: opacity, transform; }
.fade-in-up.is-visible { opacity: 1; transform: translateY(0); }
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* ======================================================================
   SELECT BOX & NAVIGATION CUSTOM STYLING (A11y/UI 最適化)
   ====================================================================== */
.select-wrapper { 
    position: relative; 
    display: block; 
    width: 100%; 
}
.select-wrapper select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    padding-right: 3rem !important; 
}
/* ライトモード用矢印アイコン */
.select-wrapper::after {
    content: '';
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.2rem;
    height: 1.2rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    pointer-events: none;
    z-index: 10;
}
/* ダークモード用矢印アイコン（自動反転し高い視認性を確保） */
.dark .select-wrapper::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23f8fafc'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
}

/* ======================================================================
   SEO & W3C Accessibility Utilities
   ====================================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ======================================================================
   【最強SEO ＆ 視認性】ライトモード・プロテクション・シールドCSS
   データ内のハードコードされた白文字クラス（text-white等）をライトモード時のみ強制上書き補正します
   ====================================================================== */
html:not(.dark) .text-white,
html:not(.dark) .text-slate-100,
html:not(.dark) .text-slate-200,
html:not(.dark) .text-slate-300,
html:not(.dark) .text-slate-400 {
    color: #1e293b !important;
}

html:not(.dark) .dark\:text-white,
html:not(.dark) .dark\:text-slate-100,
html:not(.dark) .dark\:text-slate-200,
html:not(.dark) .dark\:text-slate-300,
html:not(.dark) .dark\:text-slate-400 {
    color: #1e293b !important;
}

html:not(.dark) .bg-[#0f172a],
html:not(.dark) .bg-[#0f172a]\/80,
html:not(.dark) .dark\:bg-\[\#0f172a\]\/50 {
    background-color: rgba(241, 245, 249, 0.9) !important;
}

html:not(.dark) .bg-white\/5 {
    background-color: rgba(15, 23, 42, 0.04) !important;
}

html:not(.dark) .border-white\/10,
html:not(.dark) .border-white\/5,
html:not(.dark) .dark\:border-white\/5 {
    border-color: rgba(15, 23, 42, 0.08) !important;
}

html:not(.dark) .text-slate-350 {
    color: #334155 !important;
}

/* 端末サイズごとの画面崩れ・横揺れを完璧に抑え込むグローバルラッパー */
@media (max-width: 1023px) {
    body, html {
        max-width: 100vw !important;
        overflow-x: hidden !important;
    }
}

/* ======================================================================
   【reCAPTCHAバッジ非表示設定】
   お問い合わせフォーム等に公式免責事項が表示されているため、ライセンス上非表示化が認められています
   ====================================================================== */
.grecaptcha-badge {
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
}