/* ============================================
   AI PROMPT VAULT -- Design System
   Palette: Deep dark blue-gray + electric teal/cyan
   ============================================ */

:root {
    --bg: #0d1117;
    --bg-alt: #161b22;
    --bg-card: #1c2333;
    --bg-surface: #21293a;
    --ink: #e6edf3;
    --ink-soft: #b0bec5;
    --muted: #6e7681;
    --border: rgba(255,255,255,.06);
    --border-light: rgba(255,255,255,.1);
    --accent: #58d5c9;
    --accent-dark: #3fb8ad;
    --accent-pale: rgba(88,213,201,.08);
    --accent-glow: rgba(88,213,201,.15);
    --accent-bright: #7ee8d9;
    --teal-deep: #2d6a65;
    --teal-soft: rgba(88,213,201,.12);
    --success: #4ecb8a;
    --danger: #e05858;
    --serif: 'Libre Baskerville', Georgia, serif;
    --sans: 'Inter', system-ui, sans-serif;
    --sidebar-w: 280px;
}

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

body {
    font-family: var(--sans);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* ---- SIDEBAR ---- */
.sidebar {
    position: fixed; top: 0; left: 0;
    width: var(--sidebar-w); height: 100vh;
    background: linear-gradient(180deg, #0f1923 0%, #0d1117 100%);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    z-index: 98; overflow-y: auto;
    transition: transform .3s ease;
}
.sidebar-header {
    padding: 1.8rem 1.5rem 1.4rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(88,213,201,.06) 0%, transparent 100%);
}
.sidebar-icon {
    font-size: 1.8rem; margin-bottom: .3rem;
    display: block;
}
.sidebar-title {
    font-family: var(--serif); font-size: 1.1rem;
    font-weight: 400; color: var(--accent);
}
.sidebar-sub {
    font-size: .6rem; color: var(--muted);
    text-transform: uppercase; letter-spacing: .15em; margin-top: .15rem;
}
.sidebar-nav { flex: 1; padding: .5rem 0; overflow-y: auto; }

.nav-layer {
    padding: .8rem 1.25rem .35rem; font-size: .6rem; font-weight: 700;
    letter-spacing: .12em; text-transform: uppercase;
    color: var(--accent); opacity: .75; margin-top: .3rem;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-layer:first-child { margin-top: 0; }
.nav-layer .layer-count {
    font-size: .55rem; font-weight: 600; letter-spacing: .05em;
    color: var(--muted); opacity: .8;
}

.nav-prompt {
    padding: .45rem 1.25rem .45rem 1.5rem; font-size: .78rem; color: var(--muted);
    cursor: pointer; border-left: 2px solid transparent;
    transition: all .15s; display: flex; align-items: center;
    gap: .45rem; text-decoration: none; line-height: 1.4;
}
.nav-prompt:hover { background: rgba(88,213,201,.04); color: var(--ink); }
.nav-prompt.active {
    border-left-color: var(--accent); color: var(--accent);
    font-weight: 600; background: rgba(88,213,201,.06);
}
.nav-prompt .nav-id {
    font-size: .65rem; font-weight: 700; color: var(--accent);
    opacity: .6; flex-shrink: 0; width: 22px;
}
.nav-prompt.active .nav-id { opacity: 1; }

/* ---- MOBILE ---- */
.mobile-header {
    display: none; position: fixed; top: 0; left: 0; right: 0;
    height: 50px; background: rgba(13,17,23,.95);
    backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
    z-index: 90; padding: 0 1rem; align-items: center; gap: .75rem;
}
.menu-btn {
    background: none; border: none; font-size: 1.3rem;
    cursor: pointer; color: var(--accent);
}
.mobile-title {
    font-family: var(--serif); font-size: .95rem; color: var(--accent);
}
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,.5); z-index: 97;
}
@media(max-width:768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.open { display: block; }
    .mobile-header { display: flex; }
    .main { margin-left: 0 !important; padding-top: 60px !important; }
}

/* ---- MAIN ---- */
.main { margin-left: var(--sidebar-w); min-height: 100vh; padding: 2.5rem 2rem; }
.content { max-width: 720px; margin: 0 auto; padding-bottom: 4rem; }

/* ---- PROMPT CARD ---- */
.prompt-card { display: none; }
.prompt-card.active { display: block; }

/* -- Card Header -- */
.prompt-header {
    background: linear-gradient(135deg, var(--accent-pale) 0%, rgba(88,213,201,.03) 100%);
    border: 1px solid var(--border-light);
    border-radius: 14px; padding: 2rem 2rem; margin-bottom: 2rem;
    position: relative;
}
.prompt-header .layer-badge {
    display: inline-block; font-size: .6rem; font-weight: 700;
    letter-spacing: .12em; text-transform: uppercase;
    color: var(--accent); background: var(--teal-soft);
    padding: .3rem .75rem; border-radius: 20px; margin-bottom: .75rem;
}
.prompt-header h2 {
    font-family: var(--serif); font-size: 1.6rem;
    font-weight: 400; line-height: 1.3; color: var(--ink);
}
.prompt-header .prompt-id {
    position: absolute; top: 1.5rem; right: 1.5rem;
    font-size: .7rem; font-weight: 700; color: var(--muted);
    letter-spacing: .05em;
}

/* -- Prompt Text Block -- */
.prompt-section { margin-bottom: 1.75rem; }
.prompt-section-label {
    font-size: .7rem; font-weight: 700; letter-spacing: .15em;
    text-transform: uppercase; color: var(--accent); margin-bottom: .75rem;
}
.prompt-code-wrap {
    position: relative;
    background: #0b1018;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    overflow: hidden;
}
.prompt-code-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: .6rem 1rem;
    background: rgba(88,213,201,.05);
    border-bottom: 1px solid var(--border);
}
.prompt-code-label {
    font-size: .65rem; font-weight: 600; color: var(--muted);
    letter-spacing: .1em; text-transform: uppercase;
}
.copy-btn {
    display: inline-flex; align-items: center; gap: .35rem;
    padding: .35rem .75rem; border-radius: 6px;
    font-size: .72rem; font-weight: 600; cursor: pointer;
    background: var(--accent); color: var(--bg);
    border: none; transition: all .2s;
}
.copy-btn:hover { opacity: .85; transform: translateY(-1px); }
.copy-btn.copied {
    background: var(--success);
}
.prompt-code {
    padding: 1.25rem 1.25rem;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
    font-size: .82rem; line-height: 1.65;
    color: var(--ink-soft);
    white-space: pre-wrap; word-break: break-word;
    overflow-x: auto;
}

/* -- Expandable Sections -- */
.expand-section { margin-bottom: 1rem; }
.expand-toggle {
    display: flex; align-items: center; gap: .5rem;
    width: 100%; padding: .85rem 1.15rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    cursor: pointer; transition: all .2s;
    color: var(--ink-soft); font-size: .88rem; font-weight: 500;
    font-family: var(--sans);
    text-align: left;
}
.expand-toggle:hover {
    border-color: var(--accent);
    color: var(--ink);
    background: var(--bg-surface);
}
.expand-toggle .expand-icon {
    font-size: .75rem; transition: transform .2s;
    color: var(--accent); flex-shrink: 0;
}
.expand-toggle.open .expand-icon {
    transform: rotate(90deg);
}
.expand-toggle .expand-label {
    font-size: .65rem; font-weight: 700; letter-spacing: .12em;
    text-transform: uppercase; color: var(--accent);
    margin-right: .5rem; flex-shrink: 0;
}
.expand-body {
    display: none;
    padding: 1.15rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 10px 10px;
    font-size: .88rem; line-height: 1.7;
    color: var(--ink-soft);
}
.expand-body.open { display: block; }
.expand-body ul { padding-left: 1.25rem; margin-bottom: .5rem; }
.expand-body li { margin-bottom: .45rem; }
.expand-body p { margin-bottom: .75rem; }
.expand-body p:last-child { margin-bottom: 0; }
.expand-body strong { color: var(--ink); }
.expand-body code {
    background: var(--bg-alt); padding: .15rem .4rem;
    border-radius: 4px; font-size: .82rem; color: var(--accent-bright);
}
.expand-body pre {
    background: #0b1018; border: 1px solid var(--border);
    border-radius: 8px; padding: 1rem;
    font-size: .8rem; color: var(--ink-soft);
    white-space: pre-wrap; word-break: break-word;
    margin: .75rem 0;
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
    line-height: 1.55;
}

/* -- Proof Section -- */
.proof-section {
    margin-top: 1.25rem; margin-bottom: 2rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(88,213,201,.04) 0%, transparent 100%);
    border-left: 3px solid var(--teal-deep);
    border-radius: 0 10px 10px 0;
}
.proof-label {
    font-size: .6rem; font-weight: 700; letter-spacing: .14em;
    text-transform: uppercase; color: var(--accent); margin-bottom: .35rem;
    opacity: .7;
}
.proof-text {
    font-size: .85rem; font-style: italic;
    color: var(--muted); line-height: 1.65;
}

/* ---- NAV BUTTONS ---- */
.nav-buttons {
    display: flex; justify-content: space-between;
    margin-top: 2.5rem; padding-top: 2rem;
    border-top: 1px solid var(--border);
    gap: 1rem;
}
.nav-btn {
    display: inline-flex; align-items: center; gap: .5rem;
    padding: .7rem 1.15rem; border-radius: 8px;
    text-decoration: none; font-size: .82rem; font-weight: 600;
    transition: all .2s; cursor: pointer;
    white-space: nowrap;
}
.nav-btn-prev {
    border: 1px solid var(--border-light); color: var(--ink-soft); background: var(--bg-card);
}
.nav-btn-prev:hover { border-color: var(--accent); color: var(--ink); }
.nav-btn-next {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--bg); border: none;
}
.nav-btn-next:hover { opacity: .9; transform: translateY(-1px); }

/* ---- FOOTER ---- */
.footer { text-align: center; margin-top: 3rem; font-size: .8rem; color: var(--muted); }
.footer a { color: var(--ink-soft); text-decoration: none; }
.help {
    text-align: center; margin-top: 2rem; padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.help p { font-size: .85rem; color: var(--muted); margin-bottom: .75rem; }
.help a { color: var(--accent); text-decoration: none; }
.help a:hover { text-decoration: underline; }

/* ---- PAYWALL ---- */
.paywall-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: var(--bg);
    display: flex; align-items: center; justify-content: center; padding: 2rem;
}
.paywall-overlay.hidden { display: none; }
.paywall-card {
    max-width: 480px; text-align: center;
    padding: 3rem 2.5rem;
    border: 1px solid var(--accent);
    border-radius: 16px;
    background: var(--bg-card);
    box-shadow: 0 8px 60px rgba(88,213,201,.08);
}
.paywall-card .paywall-icon {
    font-size: 2.5rem;
    margin-bottom: .5rem;
    display: block;
}
.paywall-card h2 {
    font-family: var(--serif); font-size: 1.8rem;
    font-weight: 400; margin-bottom: .75rem; color: var(--ink);
}
.paywall-card h2 em { font-style: italic; color: var(--accent); }
.paywall-card p {
    font-size: .95rem; color: var(--ink-soft);
    margin-bottom: 1.5rem; line-height: 1.7;
}
.paywall-card .cta-btn {
    display: inline-flex; align-items: center; gap: .5rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--bg); font-size: 1rem; font-weight: 600;
    padding: 1rem 2rem; border-radius: 8px; text-decoration: none;
    transition: all .2s; box-shadow: 0 4px 20px var(--accent-glow);
}
.paywall-card .cta-btn:hover { opacity: .9; transform: translateY(-1px); }
.paywall-price {
    display: block; margin-top: .75rem;
    font-size: .85rem; color: var(--muted);
}
.paywall-login { margin-top: 1.5rem; }
.paywall-login p { font-size: .8rem; color: var(--muted); margin-bottom: .5rem; }
.paywall-login input {
    padding: .5rem .75rem; border: 1px solid var(--border-light);
    border-radius: 6px; font-size: .85rem; width: 200px;
    background: var(--bg-alt); color: var(--ink);
}
.paywall-login input::placeholder { color: var(--muted); }
.paywall-login button {
    padding: .5rem 1rem; background: var(--accent);
    color: var(--bg); border: none; border-radius: 6px;
    font-size: .85rem; cursor: pointer; margin-left: .5rem;
    font-weight: 600;
}
.paywall-login button:hover { opacity: .85; }
.paywall-login .error { color: var(--danger); font-size: .8rem; margin-top: .5rem; display: none; }

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ---- ANIMATIONS ---- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.prompt-card.active {
    animation: fadeIn .3s ease;
}