/* ========================================== */
/*  CSS RESET & BASE SETUP                    */
/* ========================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* 共通ヘッダーサイズ等 */
    --switcher-height: 44px;
    --header-height: 80px;
    --scroll-offset: calc(var(--switcher-height) + var(--header-height));
    --transition-speed: 0.3s;
    --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--scroll-offset);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: 100%;
    background: none;
    border: none;
    outline: none;
}

ul, ol {
    list-style: none;
}

/* ========================================== */
/*  COMMON LAYOUTS & CONTAINERS               */
/* ========================================== */
.section-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 24px;
}

@media (max-width: 768px) {
    .section-container {
        padding: 60px 16px;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    display: inline-block;
    font-family: var(--font-family-heading);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-family-heading);
    font-size: 36px;
    font-weight: var(--font-weight-bold);
    color: var(--text-title);
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-desc {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 16px;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 28px;
    }
    .section-header {
        margin-bottom: 40px;
    }
}

/* ========================================== */
/*  THEME SWITCHER BAR (Smart Glass Style)    */
/* ========================================== */
.theme-switcher-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--switcher-height);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 2000;
    display: flex;
    align-items: center;
    color: #f8fafc;
    font-family: 'Outfit', 'Noto Sans JP', sans-serif;
    font-size: 13px;
}

.switcher-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.switcher-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #cbd5e1;
}

.switcher-label svg {
    color: #38bdf8;
    animation: rotate-cog 10s linear infinite;
}

@keyframes rotate-cog {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.switcher-buttons {
    display: flex;
    gap: 8px;
}

.theme-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    color: #cbd5e1;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

.theme-btn.active {
    background: #0284c7;
    border-color: #38bdf8;
    color: #fff;
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

@media (max-width: 768px) {
    .theme-switcher-bar {
        font-size: 11px;
    }
    .switcher-container {
        padding: 0 12px;
    }
    .switcher-label span {
        display: none; /* スマホではアイコンのみに */
    }
    .theme-btn {
        padding: 4px 8px;
    }
    .btn-text {
        font-size: 10px;
    }
}

/* ========================================== */
/*  HEADER & STICKY HEADER LAYOUT             */
/* ========================================== */
.main-header {
    position: fixed;
    top: var(--switcher-height);
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--header-bg);
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
    box-shadow: var(--box-shadow-sm);
    z-index: 1000;
    transition: all var(--transition-speed) ease;
}

.header-container {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo a {
    display: flex;
    flex-direction: column;
}

.header-logo .logo-accent {
    font-family: var(--font-family-heading);
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    line-height: 1.1;
}

.header-logo .logo-sub {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-desktop ul {
    display: flex;
    gap: 24px;
}

.nav-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 8px 4px;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
}

/* デスクトップCTAボタン */
.header-cta-btn {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 700;
    color: var(--cta-btn-text);
    background: var(--cta-btn-bg);
    border-radius: var(--border-radius-sm);
    border: var(--border-width) var(--border-style) var(--border-color-cta);
    box-shadow: var(--box-shadow-sm);
}

.header-cta-btn:hover {
    background: var(--cta-btn-hover-bg);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-md);
}

/* ハンバーガーメニュー */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1100;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2.5px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

@media (max-width: 992px) {
    .nav-desktop {
        display: none;
    }
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ========================================== */
/*  MOBILE DRAWER NAV                         */
/* ========================================== */
.nav-mobile {
    position: fixed;
    top: calc(var(--switcher-height) + var(--header-height));
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--header-bg);
    overflow: hidden;
    z-index: 999;
    transition: height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border-bottom: 0px solid var(--border-color);
}

.nav-mobile.open {
    height: calc(100vh - var(--switcher-height) - var(--header-height));
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
}

.nav-mobile ul {
    display: flex;
    flex-direction: column;
    padding: 40px 24px;
    gap: 20px;
}

.mobile-nav-link {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.mobile-cta-link {
    text-align: center;
    background: var(--cta-btn-bg);
    color: var(--cta-btn-text) !important;
    border-radius: var(--border-radius-sm);
    padding: 14px;
    margin-top: 20px;
    border: var(--border-width) var(--border-style) var(--border-color-cta);
}

/* ハンバーガーアニメーション */
.mobile-menu-toggle.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.mobile-menu-toggle.open span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-toggle.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ========================================== */
/*  CONTACT FORM DEFAULTS                     */
/* ========================================== */
.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: var(--border-width) var(--border-style) var(--border-color);
    box-shadow: var(--box-shadow-md);
    padding: 48px;
    transition: all var(--transition-speed) ease;
}

@media (max-width: 768px) {
    .contact-form-wrapper {
        padding: 24px 16px;
    }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

.form-group label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-title);
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-group label .required {
    background-color: var(--color-accent);
    color: #fff;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    border: var(--border-width) var(--border-style) var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    transition: all var(--transition-speed) ease;
}

.form-group input::placeholder, .form-group textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-submit-area {
    margin-top: 12px;
}

.btn-submit {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background-color: var(--color-primary);
    color: var(--cta-btn-text);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 800;
    box-shadow: var(--box-shadow-sm);
    transition: all var(--transition-speed) ease;
    border: var(--border-width) var(--border-style) var(--border-color);
}

.btn-submit:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.btn-submit .btn-text {
    font-size: 18px;
}

.btn-submit .btn-subtext {
    font-size: 11px;
    opacity: 0.9;
    font-weight: 400;
    margin-top: 2px;
}

.contact-official-direct {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px dashed var(--border-color);
    text-align: center;
}

.contact-official-direct p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.btn-official-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 14px;
}

.btn-official-link:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ========================================== */
/*  FOOTER BASE                               */
/* ========================================== */
.main-footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    border-top: var(--border-width) var(--border-style) var(--border-color);
    padding: 60px 24px 30px;
    transition: all var(--transition-speed) ease;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand h2 {
    font-family: var(--font-family-heading);
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 8px;
}

.footer-bottom {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    font-size: 12px;
    opacity: 0.6;
}

/* ========================================== */
/*  CONSOLE GRAPHIC UTILS                      */
/* ========================================== */
.c-green { color: #10b981; font-weight: bold; }
.highlight-console {
    background: rgba(255,255,255,0.05);
    padding: 6px 10px;
    border-radius: 4px;
    border-left: 3px solid var(--color-primary);
}