/* ============================================================
   SME AI MA — Brand Design System
   ============================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500&display=swap');

/* -------------------------------------------------------
   CSS Custom Properties (Brand Tokens)
------------------------------------------------------- */
:root {
    /* Brand Colors */
    --color-base:          #F9F8F6;   /* Premium Off-White – 背景 */
    --color-main:          #8C6A32;   /* Antique Gold Brown – テキスト・線 */
    --color-main-light:    #b89154;   /* Gold Brown lighter */
    --color-main-muted:    #a07a45;
    --color-accent-start:  #F2CB05;   /* Gradient start – Yellow */
    --color-accent-end:    #8CBF26;   /* Gradient end – Yellow-Green */
    --color-white:         #ffffff;
    --color-text:          #3a2e1e;   /* Deep warm dark */
    --color-text-muted:    #7a6a55;
    --color-border:        #e2d9cc;   /* Warm border */
    --color-danger:        #c0392b;
    --color-success:       #27ae60;

    /* Gradients */
    --gradient-accent: linear-gradient(135deg, var(--color-accent-start) 0%, var(--color-accent-end) 100%);
    --gradient-subtle: linear-gradient(135deg, #fdf9ee 0%, #f5f0e8 100%);

    /* Typography */
    --font-en:   'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-ja:   'Noto Sans JP', 'Yu Gothic', 'YuGothic', 'Hiragino Kaku Gothic ProN', sans-serif;
    --font-main: var(--font-en);

    /* Spacing */
    --space-xs:  4px;
    --space-sm:  8px;
    --space-md:  16px;
    --space-lg:  24px;
    --space-xl:  40px;
    --space-2xl: 64px;
    --space-3xl: 96px;

    /* Border Radius */
    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg:  16px;
    --radius-xl:  24px;

    /* Shadows */
    --shadow-sm:  0 1px 4px rgba(140,106,50,0.06);
    --shadow-md:  0 4px 24px rgba(140,106,50,0.10);
    --shadow-lg:  0 12px 48px rgba(140,106,50,0.14);

    /* Transitions */
    --transition: 0.25s ease;
}

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

body {
    font-family: var(--font-ja);
    background-color: var(--color-base);
    color: var(--color-text);
    margin: 0;
    padding: 0;
    line-height: 1.9;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: 0.01em;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-ja);
    font-weight: 300;
    letter-spacing: 0.06em;
    color: var(--color-text);
    margin: 0 0 var(--space-md);
    line-height: 1.4;
}

h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.9rem); }
h3 { font-size: 1.1rem; font-weight: 400; }

p {
    margin: 0 0 var(--space-md);
    line-height: 1.9;
}

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

a:hover {
    color: var(--color-main-light);
}

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

/* -------------------------------------------------------
   Layout Utilities
------------------------------------------------------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--narrow {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--medium {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.text-center  { text-align: center; }
.text-right   { text-align: right; }
.text-muted   { color: var(--color-text-muted); }

/* -------------------------------------------------------
   Navigation (Shared Header)
------------------------------------------------------- */
.site-header {
    background-color: var(--color-base);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.site-header__inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-family: var(--font-en);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    color: var(--color-main);
    text-transform: uppercase;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.site-logo:hover {
    color: var(--color-main);
    opacity: 0.8;
}

.site-logo__mark {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #fff;
    font-weight: 700;
    flex-shrink: 0;
}

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

.site-nav a {
    font-family: var(--font-ja);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-text-muted);
    letter-spacing: 0.03em;
    transition: color var(--transition);
}

.site-nav a:hover {
    color: var(--color-main);
}

/* -------------------------------------------------------
   Footer
------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-family: var(--font-ja);
    letter-spacing: 0.03em;
    margin-top: var(--space-3xl);
}

/* -------------------------------------------------------
   Buttons
------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-ja);
    font-weight: 400;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
    letter-spacing: 0.04em;
    line-height: 1;
    white-space: nowrap;
}

/* Gradient Accent Button */
.btn-brand {
    background: var(--gradient-accent);
    color: #fff;
    font-weight: 500;
    box-shadow: 0 4px 16px rgba(242,203,5,0.3);
}

.btn-brand:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(140,191,38,0.35);
    color: #fff;
}

/* Gold Brown Outline */
.btn-outline {
    background: transparent;
    border: 1px solid var(--color-main);
    color: var(--color-main);
}

.btn-outline:hover {
    background: rgba(140,106,50,0.06);
    color: var(--color-main);
}

/* Ghost / Secondary */
.btn-ghost {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

.btn-ghost:hover {
    border-color: var(--color-main);
    color: var(--color-main);
}

/* Danger */
.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: #a93226;
    transform: translateY(-1px);
    color: #fff;
}

/* Legacy compat */
.btn-primary { background: var(--gradient-accent); color: #fff; font-weight: 500; box-shadow: 0 4px 16px rgba(242,203,5,0.3); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(140,191,38,0.35); color: #fff; }
.btn-secondary { background: transparent; border: 1px solid var(--color-main); color: var(--color-main); }
.btn-secondary:hover { background: rgba(140,106,50,0.06); color: var(--color-main); }

/* Size variants */
.btn--full { width: 100%; }
.btn--lg { padding: 16px 40px; font-size: 1rem; }

/* -------------------------------------------------------
   Forms
------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--color-text);
    letter-spacing: 0.03em;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: var(--font-ja);
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    line-height: 1.5;
}

.form-input:focus {
    border-color: var(--color-main);
    box-shadow: 0 0 0 3px rgba(140,106,50,0.08);
}

.form-input::placeholder {
    color: #bbb0a0;
}

.tag-required {
    background: #c0392b;
    color: #fff;
    font-size: 0.68rem;
    padding: 2px 7px;
    border-radius: 2px;
    letter-spacing: 0.05em;
}

/* -------------------------------------------------------
   Cards
------------------------------------------------------- */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.card--flat {
    box-shadow: none;
    border-radius: var(--radius-lg);
}

/* -------------------------------------------------------
   Hub Tab Navigation
------------------------------------------------------- */
.hub-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-xl);
}

.hub-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    font-family: var(--font-ja);
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    letter-spacing: 0.03em;
    transition: color 0.15s, border-color 0.15s;
}

.hub-tab:hover {
    color: var(--color-main);
    border-bottom-color: var(--color-border);
}

.hub-tab--active {
    color: var(--color-main);
    font-weight: 500;
    border-bottom-color: var(--color-main);
}

/* -------------------------------------------------------
   Alerts & Notices
------------------------------------------------------- */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-lg);
    font-size: 0.9rem;
    line-height: 1.7;
    border-left: 3px solid;
}

.alert-error {
    background: #fdf0ee;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.alert-info {
    background: #fdf9ee;
    color: var(--color-main);
    border-color: var(--color-main);
}

.alert-success {
    background: #edfaf2;
    color: var(--color-success);
    border-color: var(--color-success);
}

/* -------------------------------------------------------
   Badges
------------------------------------------------------- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 0.72rem;
    font-family: var(--font-en);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    line-height: 1.4;
}

.badge-premium {
    background: var(--gradient-accent);
    color: #fff;
}

.badge-free {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

/* Legacy compat */
.badge-warning { background: var(--gradient-accent); color: #fff; }
.badge-neutral { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-muted); }
.badge-danger   { background: #fdf0ee; color: var(--color-danger); }
.badge-success  { background: #edfaf2; color: var(--color-success); }

/* -------------------------------------------------------
   Divider
------------------------------------------------------- */
.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-xl) 0;
}

/* -------------------------------------------------------
   Tables
------------------------------------------------------- */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-base);
    color: var(--color-text-muted);
    font-weight: 400;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

tr:last-child td { border-bottom: none; }

/* -------------------------------------------------------
   Legacy variable aliases (admin child templates compatibility)
------------------------------------------------------- */
:root {
    --text-main:     var(--color-text);
    --text-muted:    var(--color-text-muted);
    --border-color:  var(--color-border);
    --primary-color: var(--color-main);
    --primary-hover: var(--color-main-light);
    --danger-color:  var(--color-danger);
    --success-color: var(--color-success);
    --card-bg:       var(--color-white);
    --bg-color:      var(--color-base);
    --radius-sm:     4px;
    --radius-md:     8px;
    --radius-lg:     16px;
    --spacing-md:    16px;
    --spacing-lg:    24px;
    --spacing-xl:    40px;
    --shadow-sm:     var(--shadow-sm);
}

/* -------------------------------------------------------
   Admin Layout
------------------------------------------------------- */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 232px;
    background: var(--color-white);
    border-right: 1px solid var(--color-border);
    padding: 0;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.admin-logo {
    padding: 18px var(--space-lg);
    color: var(--color-main);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-sm);
}

.admin-nav {
    display: flex;
    flex-direction: column;
    padding: var(--space-sm) 0;
}

.nav-item {
    padding: 11px var(--space-lg);
    color: var(--color-text-muted);
    font-weight: 400;
    font-family: var(--font-ja);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background var(--transition), color var(--transition), border var(--transition);
    border-right: 2px solid transparent;
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav-item:hover {
    background: #fdf9ee;
    color: var(--color-main);
}

.nav-item.active {
    background: #fdf9ee;
    color: var(--color-main);
    border-right-color: var(--color-main);
    font-weight: 500;
}

.nav-item--sub {
    padding-left: 36px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    border-left: 2px solid var(--color-border);
    margin-left: var(--space-lg);
    padding-left: 20px;
}

.nav-item--sub.active {
    background: #fdf9ee;
    color: var(--color-main);
    border-right-color: var(--color-main);
    border-left-color: var(--color-main);
    font-weight: 500;
}

.nav-item--sub:hover {
    background: #fdf9ee;
    color: var(--color-main);
}

.admin-main {
    flex: 1;
    padding: var(--space-xl);
    background: var(--color-base);
    overflow-y: auto;
    min-width: 0;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.page-title {
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--color-text);
    letter-spacing: 0.07em;
    margin: 0;
}

/* Admin form inputs (search boxes, selects in admin pages) */
.admin-main select,
.admin-main input[type="text"],
.admin-main input[type="email"],
.admin-main input[type="search"] {
    font-family: var(--font-ja);
    font-size: 0.88rem;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    background: var(--color-white);
    transition: border-color var(--transition);
    outline: none;
}

.admin-main select:focus,
.admin-main input[type="text"]:focus,
.admin-main input[type="email"]:focus {
    border-color: var(--color-main);
    box-shadow: 0 0 0 3px rgba(140,106,50,0.08);
}

/* Card inside admin */
.admin-main .card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-lg);
}

.admin-main .card-header {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-md);
    font-weight: 400;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    letter-spacing: 0.03em;
    color: var(--color-text);
}

/* -------------------------------------------------------
   User Layout (Public — Centered)
------------------------------------------------------- */
.user-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.user-main {
    flex: 1;
    padding: var(--space-2xl) var(--space-lg);
}

/* Legacy compat for pages using old class */
.user-content {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

/* -------------------------------------------------------
   Gradient accent line decoration
------------------------------------------------------- */
.accent-line {
    width: 40px;
    height: 2px;
    background: var(--gradient-accent);
    margin: 0 auto var(--space-lg);
    border-radius: 2px;
}

.accent-line--left {
    margin: 0 0 var(--space-lg);
}

/* -------------------------------------------------------
   Content Body (article text)
------------------------------------------------------- */
.content-body {
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    letter-spacing: 0.03em;
}

.content-body h1, .content-body h2, .content-body h3 {
    font-weight: 300;
    margin-top: var(--space-xl);
    letter-spacing: 0.05em;
}

.content-body p {
    margin-bottom: 1.6em;
}

.content-body img {
    border-radius: var(--radius-md);
    margin: var(--space-lg) 0;
}

/* -------------------------------------------------------
   Utility
------------------------------------------------------- */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }