:root {

    --ink:          #0a0a0a;
    --ink-2:        #262626;
    --ink-3:        #525252;
    --ink-4:        #737373;
    --ink-5:        #a3a3a3;
    --ink-6:        #d4d4d4;

    --paper:        #ffffff;
    --paper-2:      #fafaf7;
    --paper-3:      #f4f4f0;
    --paper-4:      #ebebe6;

    --rule:         #e7e5e0;
    --rule-2:       #d6d3cc;

    --danger:       #9a1f1f;
    --danger-soft:  #faecec;
    --success:      #1f6b3a;
    --success-soft: #e9f3ec;
    --premium:      #8a6d22;
    --premium-soft: #f4ecd5;

    --font-jp:  'Noto Sans JP', 'Inter', system-ui, sans-serif;
    --font-en:  'Inter', 'Noto Sans JP', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Inter', ui-monospace, 'SFMono-Regular', Menlo, monospace;

    --t-eyebrow:    0.6875rem;
    --t-caption:    0.75rem;
    --t-small:      0.8125rem;
    --t-body:       0.9375rem;
    --t-lead:       1.0625rem;
    --t-h5:         1.125rem;
    --t-h4:         1.375rem;
    --t-h3:         1.75rem;
    --t-h2:         2.25rem;
    --t-h1:         clamp(2rem, 3.6vw, 2.75rem);

    --tracking-tight: -0.03em;
    --tracking-snug:  -0.015em;
    --tracking-wide:  0.04em;
    --tracking-eye:   0.14em;

    --shell-max:    1200px;
    --reading-max:  720px;
    --gutter:       clamp(1.25rem, 4vw, 3rem);

    --sidebar-w:    280px;
    --header-h:     72px;
    --control-h:    46px;

    --ease:         cubic-bezier(0.22, 0.61, 0.36, 1);
    --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
    --dur-1:        160ms;
    --dur-2:        280ms;
    --dur-3:        480ms;

    --overlay-bg:   rgba(10, 10, 10, 0.45);
    --lock-bg:      rgba(255, 255, 255, 0.78);
    --shadow-md:    0 12px 28px -12px rgba(0, 0, 0, 0.35);
    --shadow-lg:    0 30px 80px -20px rgba(0, 0, 0, 0.35);

    --z-header:     200;
    --z-drawer:     300;
    --z-modal:      900;
    --z-toast:      1000;

    color-scheme: light;
}

:root[data-theme="dark"] {
    --ink:          #f5f5f1;
    --ink-2:        #d4d4d0;
    --ink-3:        #a8a8a4;
    --ink-4:        #82827e;
    --ink-5:        #5e5e5a;
    --ink-6:        #3d3d3a;

    --paper:        #1c1c1a;
    --paper-2:      #131312;
    --paper-3:      #28282a;
    --paper-4:      #363635;

    --rule:         #2a2a28;
    --rule-2:       #3a3a38;

    --danger:       #ef4444;
    --danger-soft:  rgba(239, 68, 68, 0.14);
    --success:      #22c55e;
    --success-soft: rgba(34, 197, 94, 0.14);
    --premium:      #eab308;
    --premium-soft: rgba(234, 179, 8, 0.16);

    --overlay-bg:   rgba(0, 0, 0, 0.6);
    --lock-bg:      rgba(0, 0, 0, 0.55);
    --shadow-md:    0 12px 28px -12px rgba(0, 0, 0, 0.7);
    --shadow-lg:    0 30px 80px -20px rgba(0, 0, 0, 0.7);

    color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-jp);
    font-size: var(--t-body);
    line-height: 1.7;
    color: var(--ink);
    background: var(--paper-2);
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; padding: 0; }
input, select, textarea { font: inherit; color: inherit; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5, p { margin: 0; }

::selection { background: var(--ink); color: var(--paper); }

.hidden { display: none !important; }
.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;
}

#view-container {
    position: relative;
    width: 100%;
    min-height: 100%;
}

#login-view, #dashboard-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.initial-loading {
    position: fixed; inset: 0;
    background: var(--paper-2);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s var(--ease);
}
.initial-loading.fade-out { opacity: 0; pointer-events: none; }
.loading-content { text-align: center; color: var(--ink-3); }
.loading-content p {
    margin-top: 1.25rem;
    font-size: var(--t-caption);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}
.loading-spinner-large {
    width: 36px; height: 36px;
    border: 2px solid var(--ink-6);
    border-top-color: var(--ink);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#login-view {
    background: var(--paper);
    color: var(--ink);
}

.login-header {
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
}

.login-header__inner {
    padding: 1.25rem var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.wordmark {
    font-family: var(--font-en);
    font-weight: 900;
    font-size: 1.625rem;
    letter-spacing: -0.06em;
    color: var(--ink);
}
.wordmark:hover { color: var(--ink-3); }

.login-main {
    flex: 1;
    display: flex;
    align-items: center;
    padding: clamp(3rem, 10vh, 6rem) var(--gutter);
}

.login-card {
    width: 100%;
    max-width: 560px;
    text-align: left;

    margin-left: clamp(0px, 10vw, 160px);
    margin-right: auto;
}

.login-card__eyebrow {
    font-family: var(--font-en);
    font-size: var(--t-caption);
    font-weight: 600;
    letter-spacing: var(--tracking-eye);
    text-transform: uppercase;
    color: var(--ink-4);
    margin-bottom: 1.75rem;
}

.login-card__title {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
}

.login-card__lede {
    font-size: var(--t-lead);
    line-height: 1.85;
    color: var(--ink-3);
    margin-bottom: 2.75rem;
    font-weight: 300;
    max-width: 28em;
}

.login-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 1rem 2rem;
    background: var(--ink);
    color: var(--paper);
    font-weight: 600;
    font-size: var(--t-body);
    letter-spacing: 0.02em;
    border-radius: 999px;
    transition: transform var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out), background var(--dur-1) var(--ease);
}
.login-card__cta:hover {
    background: var(--ink-2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.login-card__cta svg { width: 18px; height: 18px; }

@media (max-width: 720px) {
    .login-card {
        margin-left: 0;
        margin-right: 0;
    }
}

.login-footer {
    border-top: 1px solid var(--rule);
    background: var(--paper);
    padding: 2.5rem var(--gutter);
}
.login-footer__inner {
    text-align: center;
    font-size: var(--t-caption);
    color: var(--ink-4);
}
.login-footer__nav {
    display: flex; flex-wrap: wrap;
    justify-content: center; gap: 0.25rem 1.5rem;
    margin-bottom: 0.75rem;
}
.login-footer__nav a:hover { color: var(--ink); }

#dashboard-wrapper {
    background: var(--paper-2);
}

.shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--paper);
    border-right: 1px solid var(--rule);
    box-shadow: 1px 0 0 0 var(--paper), 4px 0 24px -20px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
    transition: transform var(--dur-3) var(--ease-out);
    z-index: 2;
}

.sidebar__brand {
    flex-shrink: 0;
    padding: 1.5rem var(--gutter);
    border-bottom: 1px solid var(--rule);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar__brand .wordmark {
    font-size: 1.5rem;
}

.sidebar__brand-actions {
    display: flex;
    align-items: center;
    gap: 0.125rem;
}
.sidebar__close {
    display: none;
    padding: 0.5rem;
    color: var(--ink-3);
}
.sidebar__close:hover { color: var(--ink); }

.theme-toggle {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    color: var(--ink-3);
    transition: color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.theme-toggle:hover { color: var(--ink); background: var(--paper-3); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .theme-toggle__sun { display: block; }
.theme-toggle .theme-toggle__moon { display: none; }
:root[data-theme="dark"] .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon { display: block; }

.sidebar__server {
    flex-shrink: 0;
    padding: 1.5rem var(--gutter) 1.25rem;
    border-bottom: 1px solid var(--rule);
}

.sidebar__nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.5rem 0 2rem;
}

.nav-section + .nav-section { margin-top: 1.75rem; }

.nav-section__title {
    padding: 0 var(--gutter) 0.625rem;
    font-family: var(--font-en);
    font-size: var(--t-eyebrow);
    font-weight: 700;
    letter-spacing: var(--tracking-eye);
    text-transform: uppercase;
    color: var(--ink-4);
}

.nav-list { display: flex; flex-direction: column; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem var(--gutter);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--ink-3);
    letter-spacing: var(--tracking-snug);
    transition: color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
    position: relative;
    cursor: pointer;
}
.nav-link__icon {
    color: var(--ink-5);
    transition: color var(--dur-1) var(--ease);
    flex-shrink: 0;
    display: inline-flex;
}
.nav-link__label { flex: 1; }
.nav-link:hover .nav-link__icon,
.nav-link.active .nav-link__icon { color: var(--ink); }
.nav-link::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    width: 3px; height: 0;
    background: var(--ink);
    transform: translateY(-50%);
    transition: height var(--dur-2) var(--ease-out);
}
.nav-link:hover { color: var(--ink); background: var(--paper-2); }
.nav-link.active {
    color: var(--ink);
    font-weight: 700;
    background: var(--paper-2);
}
.nav-link.active::before { height: 22px; }

.nav-link__dot {
    width: 6px; height: 6px; border-radius: 999px;
    background: var(--ink-5);
    opacity: 0;
    transition: opacity var(--dur-1) var(--ease);
}
.nav-link.has-new .nav-link__dot { opacity: 1; background: var(--ink); }

.nav-link__premium {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--premium);
}
.nav-link__premium svg {
    width: 15px; height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
}

.sidebar__footer {
    flex-shrink: 0;
    padding: 1.25rem var(--gutter);
    border-top: 1px solid var(--rule);
    background: var(--paper);
    display: flex;
    align-items: center;
    gap: 0.875rem;
}
.sidebar__avatar {
    width: 36px; height: 36px; border-radius: 999px;
    background: var(--paper-3);
    cursor: pointer;
    transition: transform var(--dur-1) var(--ease);
    object-fit: cover;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}
.sidebar__avatar-img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: cover; border-radius: inherit;
}
.sidebar__avatar:hover { transform: scale(1.06); }
.sidebar__user-meta { min-width: 0; flex: 1; }
.sidebar__user-name {
    font-size: var(--t-small);
    font-weight: 600;
    color: var(--ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sidebar__user-action {
    font-size: var(--t-eyebrow);
    color: var(--ink-4);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}
.sidebar__user-action:hover { color: var(--ink); }
.sidebar__user-action svg { opacity: 0.8; }

.main {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--gutter);
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}
.topbar__menu {
    padding: 0.5rem;
    color: var(--ink);
}
.topbar__menu svg { width: 22px; height: 22px; }

.main-content {
    flex: 1;
    padding: clamp(2.5rem, 5vw, 4.5rem) var(--gutter) 5rem;
    max-width: var(--shell-max);
    width: 100%;
    margin: 0 auto;
}

.drawer-backdrop {
    position: fixed; inset: 0;
    background: var(--overlay-bg);
    z-index: calc(var(--z-drawer) - 1);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-2) var(--ease);
}
.drawer-backdrop.is-open { opacity: 1; pointer-events: auto; }

.dash-footer {
    border-top: 1px solid var(--rule);
    background: var(--paper);
    padding: 2.5rem var(--gutter);
    margin-top: 4rem;
}
.dash-footer__inner {
    max-width: var(--shell-max);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    align-items: center;
    justify-content: space-between;
    font-size: var(--t-caption);
    color: var(--ink-4);
}
.dash-footer__links {
    display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem;
}
.dash-footer__links a:hover { color: var(--ink); }
.dash-footer__copy { font-family: var(--font-en); }

@media (max-width: 1023px) {
    .shell {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: fixed;
        top: 0; left: 0;
        width: min(320px, 86vw);
        height: 100vh;
        transform: translateX(-100%);
        z-index: var(--z-drawer);
        border-right: 1px solid var(--rule);
        box-shadow: 0 25px 60px -12px rgba(0,0,0,0.18);
    }
    .sidebar.is-open { transform: translateX(0); }
    .sidebar__close { display: inline-flex; }
    .topbar { display: flex; }
    .main-content { padding-top: 2rem; }
}

@media (max-width: 540px) {
    :root { --gutter: 1.25rem; }
    .login-card__title { font-size: 2rem; }
}