@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Shippori+Mincho+B1:wght@400;500;600;700&display=swap');

:root {
    --paper: #FBF6ED;
    --paper-cream: #FBF6ED;
    --paper-deep: #F4ECDD;
    --ink: #0F0E0D;
    --ink-soft: #1A1815;
    --muted: #83715C;
    --muted-soft: #A99780;
    --hairline: #D4C5B4;
    --hairline-soft: #E5DDC8;
    --bronze: #DA913E;
    --bronze-deep: #83715C;
    --senior: rgb(206, 247, 209);
    --junior: rgb(248, 255, 212);
    --surface: #FFFEF8;
    --error: #B23A3A;

    --font-display: 'Shippori Mincho B1', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100dvh;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
}
body { position: relative; }
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: url('/static/assets/bg-paper-texture.png') center / cover no-repeat;
    opacity: 0.10;
    pointer-events: none;
    z-index: 0;
}
body > * { position: relative; z-index: 1; }

.hidden { display: none !important; }
button { font-family: inherit; }

.eyebrow {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--bronze);
}
.display {
    font-family: var(--font-display);
    font-weight: 500;
    letter-spacing: -0.05em;
    color: var(--ink);
}

.primary-btn {
    background: var(--ink);
    color: var(--paper);
    border: 1px solid var(--ink);
    padding: 11px 22px;
    border-radius: var(--radius-md);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
}
.primary-btn:hover { opacity: 0.86; }
.primary-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.primary-btn.full { width: 100%; padding: 14px; font-size: 13px; }

.ghost-btn {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--hairline);
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}
.ghost-btn:hover { color: var(--ink); border-color: var(--ink-soft); }
.ghost-btn.full { width: 100%; padding: 10px; }

/* LOGIN */
.login-screen {
    height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 14px;
}
.login-wordmark img { height: 40px; }
.login-screen h1 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 72px;
    letter-spacing: -0.06em;
    line-height: 1;
}
.login-screen .subtitle {
    color: var(--muted);
    font-style: italic;
    max-width: 480px;
    text-align: center;
    margin-bottom: 1rem;
}
.login-screen input {
    background: var(--surface);
    border: 1px solid var(--hairline);
    color: var(--ink);
    padding: 14px 18px;
    font-size: 16px;
    width: 320px;
    max-width: 90vw;
    border-radius: var(--radius-md);
    outline: none;
    font-family: inherit;
}
.login-screen input:focus { border-color: var(--ink); }
#login-error {
    color: var(--error);
    min-height: 1.2em;
    font-size: 0.9rem;
}

/* APP SHELL */
.app-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100dvh;
    overflow: hidden;
}
.sidebar {
    background: rgba(244, 236, 221, 0.45);
    border-right: 1px solid var(--hairline);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.sidebar-head {
    padding: 18px 18px 14px;
    border-bottom: 1px solid var(--hairline-soft);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.brand {
    display: flex;
    align-items: baseline;
    gap: 10px;
}
.brand .wordmark {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 20px;
    letter-spacing: -0.04em;
    color: var(--ink);
}
.brand .label {
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted);
    margin-left: auto;
}
.sidebar-section {
    padding: 14px 18px 6px;
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--bronze);
    font-weight: 500;
}
.library {
    flex: 1;
    overflow-y: auto;
    padding: 0 8px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.library-empty {
    padding: 8px 18px;
    font-size: 12px;
    color: var(--muted-soft);
    font-style: italic;
}
.library-item {
    display: flex;
    flex-direction: column;
    padding: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
}
.library-item:hover, .library-item.active {
    background: var(--surface);
    border-color: var(--hairline-soft);
}
.library-item .li-tpl {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--bronze);
}
.library-item .li-title {
    font-size: 13px;
    color: var(--ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-top: 2px;
}
.library-item .li-time {
    font-size: 11px;
    color: var(--muted-soft);
    margin-top: 2px;
}
.sidebar-foot { padding: 12px 18px; border-top: 1px solid var(--hairline-soft); }

.main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}
.main-head {
    padding: 14px 24px;
    border-bottom: 1px solid var(--hairline-soft);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 14px;
}
.main-head .display { font-size: 24px; }
.status { color: var(--muted); font-size: 13px; }

/* STAGE HEAD shared */
.stage-head {
    padding: 18px 24px;
    border-bottom: 1px solid var(--hairline-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.stage-head.with-back {
    justify-content: flex-start;
}
.selected-template-name {
    font-family: var(--font-display);
    font-size: 18px;
    color: var(--ink);
}

/* ============= STAGE 1: GALLERY ============= */
.gallery-stage {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}
.template-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
    max-width: 1200px;
    margin: 0 auto;
}
.template-card {
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s;
    display: flex;
    flex-direction: column;
}
.template-card:hover {
    border-color: var(--ink-soft);
    transform: translateY(-2px);
}
.template-card .thumb {
    aspect-ratio: 16 / 9;
    background: var(--paper);
    border-bottom: 1px solid var(--hairline-soft);
    display: flex;
    align-items: center;
    justify-content: center;
}
.template-card .thumb svg {
    width: 100%;
    height: 100%;
    display: block;
}
.template-card .meta {
    padding: 14px 16px;
}
.template-card .name {
    font-family: var(--font-display);
    font-size: 18px;
    color: var(--ink);
    margin-bottom: 4px;
    letter-spacing: -0.02em;
}
.template-card .tagline {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.45;
}
.template-card.custom .name::before {
    content: "★ ";
    color: var(--bronze);
}

/* ============= STAGE 2: BRIEF ============= */
.brief-stage {
    flex: 1;
    overflow-y: auto;
}
.brief-form {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.form-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.form-row label {
    font-size: 11px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 500;
}
.form-row textarea, .form-row input[type="text"] {
    background: var(--surface);
    border: 1px solid var(--hairline);
    color: var(--ink);
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    line-height: 1.55;
    outline: none;
    transition: border-color 0.15s;
    resize: vertical;
}
.form-row textarea:focus, .form-row input[type="text"]:focus { border-color: var(--ink-soft); }
.form-hint {
    font-size: 12px;
    color: var(--muted-soft);
    line-height: 1.5;
}
.ref-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.ref-status { font-size: 12px; color: var(--muted); }
.ref-status.has-file { color: var(--ink); font-weight: 500; }
.toggles { flex-direction: row; gap: 18px; }
.toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink);
    cursor: pointer;
    text-transform: none;
    letter-spacing: normal;
    font-weight: 400;
}
.toggle input { cursor: pointer; }

/* ============= STAGE 3: RESULT ============= */
.result-stage {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.result-grid {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 360px;
    overflow: hidden;
}
.result-preview {
    padding: 18px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    overflow: hidden;
}
.preview-area {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 300px;
}
.preview-loading {
    text-align: center;
    color: var(--muted);
    padding: 40px;
    z-index: 5;
    background: var(--surface);
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--hairline);
    border-top-color: var(--bronze);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
    font-family: var(--font-display);
    font-size: 22px;
    color: var(--ink);
    margin-bottom: 6px;
}
.loading-sub { font-size: 12px; color: var(--muted); }

.preview-canvas-stack {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.preview-img, .preview-video, .preview-iframe {
    max-width: 100%;
    max-height: 100%;
    display: block;
}
.preview-iframe { width: 100%; height: 100%; border: none; background: white; }
.annotation-canvas {
    position: absolute;
    inset: 0;
    cursor: crosshair;
    z-index: 10;
}

.preview-tabs {
    display: flex;
    gap: 4px;
    margin-left: auto;
}
.preview-tabs .tab {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--hairline);
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
}
.preview-tabs .tab.active {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.downloads {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.download-btn {
    background: var(--ink);
    color: var(--paper);
    text-decoration: none;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 600;
}
.download-btn:hover { opacity: 0.86; }

/* TOOLS PANE */
.result-tools {
    border-left: 1px solid var(--hairline-soft);
    background: rgba(244, 236, 221, 0.35);
    padding: 18px 18px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.tools-block {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--hairline-soft);
}
.tools-block:last-child { border-bottom: none; }

.tool-toggle {}
.annotation-tools {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 10px;
    background: var(--surface);
    border: 1px solid var(--hairline-soft);
    border-radius: var(--radius-sm);
}
.brush-row, .tool-row {
    display: flex;
    gap: 8px;
    align-items: center;
}
.brush-btn {
    width: 26px;
    height: 26px;
    border: 2px solid var(--hairline);
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    transition: border-color 0.15s, transform 0.15s;
}
.brush-btn.active {
    border-color: var(--ink);
    transform: scale(1.1);
}
.tool-label {
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-left: auto;
}
#refine-text {
    background: var(--surface);
    border: 1px solid var(--hairline);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    outline: none;
    resize: vertical;
    min-height: 80px;
}
#refine-text:focus { border-color: var(--ink-soft); }

.save-block { padding-bottom: 0; }

/* MOBILE */
@media (max-width: 900px) {
    .result-grid { grid-template-columns: 1fr; }
    .result-tools { border-left: none; border-top: 1px solid var(--hairline-soft); max-height: 50dvh; }
}
@media (max-width: 600px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    .main-head { padding: 12px 16px; }
    .main-head .display { font-size: 18px; }
    .gallery-stage { padding: 14px; }
    .template-gallery { grid-template-columns: 1fr; }
    .brief-form { padding: 18px 16px; }
    .stage-head { padding: 12px 16px; }
    .login-screen h1 { font-size: 56px; }
    .form-row textarea, .form-row input[type="text"] { font-size: 16px; }
}