@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=IBM+Plex+Mono:wght@400;500&family=Literata:opsz,wght@7..72,400;7..72,500;7..72,600&display=swap');

:root {
    --paper: #f5efe4;
    --paper-strong: #fffdf7;
    --paper-shadow: rgba(76, 61, 42, 0.14);
    --paper-shadow-soft: rgba(76, 61, 42, 0.08);
    --ink: #181612;
    --ink-soft: #595244;
    --ink-faint: #877d6d;
    --rule: rgba(88, 71, 50, 0.18);
    --rule-strong: rgba(58, 46, 31, 0.34);
    --accent: #7e4c27;
    --accent-soft: rgba(126, 76, 39, 0.1);
    --accent-contrast: #fff8ef;
    --success: #46552f;
    --danger: #7b4037;
    --warning: #876229;
    --button-shadow: 0 8px 18px rgba(24, 22, 18, 0.08);
    --panel-shadow: 0 22px 44px var(--paper-shadow), 0 10px 24px var(--paper-shadow-soft);
    --panel-shadow-soft: 0 12px 26px var(--paper-shadow-soft);
}

body.night-mode {
    --paper: #1a1815;
    --paper-strong: #24211d;
    --paper-shadow: rgba(0, 0, 0, 0.44);
    --paper-shadow-soft: rgba(0, 0, 0, 0.24);
    --ink: #f1eadc;
    --ink-soft: #c6baa5;
    --ink-faint: #978a74;
    --rule: rgba(241, 234, 220, 0.12);
    --rule-strong: rgba(241, 234, 220, 0.26);
    --accent: #d5af77;
    --accent-soft: rgba(213, 175, 119, 0.14);
    --accent-contrast: #181512;
    --success: #b7c48b;
    --danger: #d49488;
    --warning: #dfc07d;
    --button-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(126, 76, 39, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(0, 0, 0, 0.05), transparent 22%),
        linear-gradient(180deg, #fcf8f0 0%, var(--paper) 100%);
    color: var(--ink);
    font-family: 'Literata', serif;
    line-height: 1.65;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.45), transparent 30%),
        radial-gradient(circle at 80% 10%, rgba(126, 76, 39, 0.05), transparent 25%),
        radial-gradient(circle at 50% 100%, rgba(126, 76, 39, 0.08), transparent 30%);
    opacity: 0.9;
    z-index: -2;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(88, 71, 50, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 71, 50, 0.02) 1px, transparent 1px);
    background-size: 100% 3.6rem, 4rem 100%;
    opacity: 0.5;
    z-index: -1;
}

body.night-mode {
    background:
        radial-gradient(circle at top left, rgba(213, 175, 119, 0.08), transparent 26%),
        linear-gradient(180deg, #100f0d 0%, var(--paper) 100%);
}

body.night-mode::after {
    background-image:
        linear-gradient(rgba(241, 234, 220, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(241, 234, 220, 0.02) 1px, transparent 1px);
}

::selection {
    background: var(--accent);
    color: var(--accent-contrast);
}

a,
button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: inherit;
}

p {
    margin: 0;
}

h1,
h2,
h3 {
    margin: 0;
    font-family: 'Fraunces', serif;
    font-weight: 650;
    line-height: 1.1;
    color: var(--ink);
}

strong {
    color: var(--ink);
}

.app-shell {
    max-width: 1460px;
    min-height: 100vh;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 28px;
}

.site-rail {
    position: sticky;
    top: 24px;
    align-self: start;
    height: calc(100vh - 48px);
    display: flex;
    flex-direction: column;
    gap: 22px;
    padding: 28px 24px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.44));
    background-color: var(--paper-strong);
    border: 1px solid var(--rule);
    border-radius: 28px;
    box-shadow: var(--panel-shadow);
}

body.night-mode .site-rail,
body.night-mode .page-sheet,
body.night-mode .paper-panel {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
    background-color: var(--paper-strong);
}

.brand-mark {
    display: grid;
    gap: 12px;
    text-decoration: none;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--rule);
}

.brand-kicker,
.route-kicker,
.page-kicker,
.panel-kicker,
.tool-card__meta,
.landing-meta span,
.tool-link,
.note-grid span,
.small-print,
.status-line,
.site-nav a,
.rail-btn,
.url-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.brand-kicker,
.route-kicker,
.page-kicker,
.panel-kicker,
.landing-meta span,
.note-grid span,
.small-print,
.status-line,
.url-meta {
    color: var(--ink-faint);
}

.brand-title {
    font-size: clamp(2.4rem, 4vw, 3.25rem);
    letter-spacing: -0.03em;
}

.brand-copy,
.route-summary,
.page-description,
.panel-copy,
.tool-card p {
    color: var(--ink-soft);
}

.site-nav {
    display: grid;
    gap: 8px;
}

.site-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    text-decoration: none;
    color: var(--ink-soft);
    border: 1px solid transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.site-nav a::after {
    content: attr(data-index);
    color: var(--ink-faint);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    background: var(--accent-soft);
    border-color: var(--rule);
    color: var(--ink);
}

.rail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.rail-btn,
.tool-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--rule-strong);
    background: rgba(255, 255, 255, 0.68);
    color: var(--ink);
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--button-shadow);
    transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

body.night-mode .rail-btn,
body.night-mode .tool-button {
    background: rgba(255, 255, 255, 0.04);
}

.rail-btn:hover,
.tool-button:hover {
    transform: translateY(-1px);
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.rail-btn--ghost,
.tool-button--ghost {
    background: transparent;
    box-shadow: none;
}

.rail-btn--accent,
.tool-button--accent {
    border-color: var(--accent);
    color: var(--accent);
}

.rail-btn--accent:hover,
.tool-button--accent:hover {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
}

.tool-button--primary {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.tool-button--primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-contrast);
}

.tool-button--danger {
    border-color: var(--danger);
    color: var(--danger);
}

.tool-button--danger:hover {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff7f4;
}

.route-note {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px dashed var(--rule);
    display: grid;
    gap: 8px;
}

.page-stage {
    min-width: 0;
    display: flex;
    padding: 4px 0 28px;
}

.page-sheet {
    width: 100%;
    position: relative;
    overflow: hidden;
    padding: 36px 40px 48px;
    border-radius: 34px;
    border: 1px solid var(--rule);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.46));
    background-color: var(--paper-strong);
    box-shadow: var(--panel-shadow);
}

.page-sheet::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(88, 71, 50, 0.055) 1px, transparent 1px);
    background-size: 100% 3.75rem;
    opacity: 0.35;
    pointer-events: none;
}

.page-head,
.page-body {
    position: relative;
    z-index: 1;
}

.page-head {
    display: grid;
    gap: 14px;
    margin-bottom: 32px;
    padding-bottom: 26px;
    border-bottom: 1px solid var(--rule);
}

.page-title {
    font-size: clamp(2.3rem, 5vw, 4.4rem);
    letter-spacing: -0.04em;
    max-width: 11ch;
}

.page-description {
    max-width: 62ch;
    font-size: 1.02rem;
}

.page-body {
    display: grid;
    gap: 24px;
}

.paper-panel {
    display: grid;
    gap: 14px;
    padding: 24px;
    border: 1px solid var(--rule);
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.4);
    box-shadow: var(--panel-shadow-soft);
}

.panel-title {
    font-size: clamp(1.55rem, 3vw, 2.3rem);
    letter-spacing: -0.03em;
    max-width: 14ch;
}

.landing-layout,
.tool-layout {
    display: grid;
    gap: 20px;
}

.landing-layout--narrow {
    max-width: 1040px;
}

.landing-intro {
    gap: 16px;
}

.landing-meta,
.note-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

/* Prevent Home Page Title Wrapping */
.landing-intro .panel-title {
    max-width: none !important;
}

@media (max-width: 760px) {
    .landing-intro .panel-title {
        word-break: break-word;
        hyphens: auto;
    }
}

.landing-meta div,
.note-grid div {
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px dashed var(--rule-strong);
    background: rgba(255, 255, 255, 0.24);
}

.landing-meta strong,
.note-grid strong {
    display: block;
    margin-top: 6px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.tool-grid--dual {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-card {
    min-height: 240px;
}

.tool-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--ink-faint);
}

.tool-card h3 {
    font-size: 1.75rem;
    letter-spacing: -0.03em;
}

.tool-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding-top: 14px;
    text-decoration: none;
    color: var(--accent);
    border-top: 1px dashed var(--rule);
}

.tool-link::after {
    content: '->';
}

.tool-layout--split {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.95fr);
}

.field-stack {
    display: grid;
    gap: 12px;
}

.input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
}

.button-row,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid var(--rule);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink);
    padding: 14px 16px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

body.night-mode input,
body.night-mode textarea,
body.night-mode select {
    background: rgba(255, 255, 255, 0.04);
    box-shadow: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--ink-faint);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

textarea {
    min-height: 12rem;
    resize: vertical;
}

.small-print {
    line-height: 1.6;
}

.status-line {
    display: block;
}

.status-line strong {
    color: var(--ink);
}

.toast {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 100;
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid var(--rule-strong);
    background: var(--paper-strong);
    color: var(--ink);
    box-shadow: var(--panel-shadow-soft);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.76rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.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;
}

@media (max-width: 1180px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .site-rail {
        position: static;
        height: auto;
    }

    .page-stage {
        padding-top: 0;
    }

    .tool-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .app-shell {
        padding: 14px;
        gap: 16px;
    }

    .site-rail,
    .page-sheet,
    .paper-panel {
        border-radius: 22px;
    }

    .site-rail,
    .page-sheet {
        padding: 22px 20px;
    }

    .site-nav {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .site-nav a {
        padding: 12px;
        text-align: center;
        justify-content: center;
        width: 100%;
    }

    .site-nav a .index {
        display: none;
    }

    .route-note {
        display: none;
    }

    .page-title {
        max-width: 100%;
    }

    .landing-meta,
    .note-grid,
    .tool-grid,
    .tool-grid--dual,
    .tool-layout--split {
        grid-template-columns: 1fr;
    }

    .input-row {
        grid-template-columns: 1fr;
    }

    .rail-actions {
        flex-direction: column;
    }

    .rail-btn,
    .tool-button {
        width: 100%;
    }
}