/* ==========================================================================
   PDF Logbook Stamper — design system v2
   "Controlled document / lab ledger" language: cool paper tones, hairline
   rules like a routing form, monospace for every data field, and a real
   ink-stamp treatment for the draggable preview. This revision adds
   depth (layered shadows, motion, a segmented mode switch, a proper
   toast) on top of the original restrained palette.
   ========================================================================== */

:root {
    --ink: #17213A;
    --ink-soft: #2C3A5C;
    --ink-softer: #4A5A82;
    --paper: #E8ECF1;
    --paper-panel: #FFFFFF;
    --rule: #C7CCD3;
    --rule-soft: #E1E4E9;
    --text-muted: #5B6472;
    --accent-red: #B4232B;
    --accent-red-soft: #E8ABAF;
    --accent-blue: #1F4C8F;
    --accent-blue-soft: #A9C2E4;
    --amber-pending: #B8862F;
    --success-green: #2E7D5B;
    --danger: #B4232B;

    --font-display: 'IBM Plex Serif', Georgia, serif;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 14px;
    --shadow-xs: 0 1px 2px rgba(23, 33, 58, 0.05);
    --shadow-card: 0 1px 3px rgba(23, 33, 58, 0.07), 0 6px 20px rgba(23, 33, 58, 0.05);
    --shadow-lift: 0 8px 28px rgba(23, 33, 58, 0.14), 0 2px 6px rgba(23, 33, 58, 0.08);
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    background:
        radial-gradient(1200px 600px at 15% -10%, rgba(31, 76, 143, 0.06), transparent),
        var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.5;
    min-height: 100vh;
}

::selection { background: var(--accent-red); color: #fff; }
a { color: var(--accent-blue); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-softer); }

/* ---------- Header ---------- */
.app-header {
    position: relative;
    background: linear-gradient(155deg, var(--ink) 0%, #1E2C4E 55%, #223362 100%);
    color: #fff;
    padding: 26px 0;
    border-bottom: 4px solid var(--accent-red);
    overflow: hidden;
}
.app-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,0.9), transparent);
    pointer-events: none;
}
.app-header .header-inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.app-header .eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #AEB8CE;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.app-header .eyebrow .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: #6FCF97;
    box-shadow: 0 0 0 3px rgba(111,207,151,0.25);
}
.app-header h1 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 27px;
    margin: 0;
    letter-spacing: 0.01em;
}
.app-header .sub { color: #C6CCDC; font-size: 13.5px; margin-top: 3px; }
.app-header .header-icon {
    width: 46px; height: 46px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    display: flex; align-items: center; justify-content: center;
    color: var(--accent-red-soft);
    flex-shrink: 0;
}

/* ---------- Step rail ---------- */
.step-rail {
    list-style: none;
    padding: 4px;
    margin: 0;
    display: flex;
    gap: 2px;
    background: var(--paper-panel);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
}
.step-rail li {
    flex: 1;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    color: var(--text-muted);
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background 0.25s var(--ease), color 0.25s var(--ease);
}
.step-rail .num {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--ink-soft);
    margin-right: 4px;
    transition: color 0.25s var(--ease);
}
.step-rail li.active { background: var(--ink); color: #fff; box-shadow: var(--shadow-xs); }
.step-rail li.active .num { color: var(--accent-red-soft); }
.step-rail li.done .num::after { content: " \2713"; color: var(--success-green); }
.step-rail li.done { color: var(--ink-soft); }

@media (max-width: 767px) {
    .step-rail { flex-wrap: wrap; }
    .step-rail li { flex: 1 1 50%; }
}

/* ---------- Reveal animation for step panels ---------- */
@keyframes reveal-up {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
}
.reveal-in { animation: reveal-up 0.5s var(--ease) both; }

/* ---------- Cards / panels ---------- */
.panel {
    background: var(--paper-panel);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 22px;
    transition: box-shadow 0.25s var(--ease);
}
.panel + .panel { margin-top: 20px; }
.panel-title {
    font-family: var(--font-display);
    font-size: 16.5px;
    font-weight: 600;
    margin: 0 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--rule-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.panel-title .icon-chip {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border-radius: 7px;
    background: #EEF2F8; color: var(--accent-blue);
    margin-right: 8px; flex-shrink: 0;
}
.panel-title .title-text { display: flex; align-items: center; }
.panel-title .hint { font-family: var(--font-body); font-size: 12px; font-weight: 400; color: var(--text-muted); }

.field-row { margin-bottom: 15px; }
.field-row label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.field-row .form-control,
.field-row .form-select {
    font-family: var(--font-mono);
    border: 1.5px solid var(--rule);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease), transform 0.1s var(--ease);
}
.field-row .form-control:focus,
.field-row .form-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 4px rgba(31, 76, 143, 0.12);
}
.field-row.text-field .form-control { font-family: var(--font-body); }

.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ---------- Buttons ---------- */
.btn { transition: transform 0.12s var(--ease), box-shadow 0.2s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease); }
.btn:active { transform: scale(0.97); }
.btn svg { vertical-align: -3px; margin-right: 6px; }

.btn-stamp {
    background: var(--accent-red);
    border: 1px solid var(--accent-red);
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 0 rgba(0,0,0,0.08), 0 6px 16px rgba(180,35,43,0.22);
}
.btn-stamp:hover { background: #922028; border-color: #922028; color: #fff; box-shadow: 0 4px 0 rgba(0,0,0,0.08), 0 10px 22px rgba(180,35,43,0.3); transform: translateY(-1px); }
.btn-stamp:disabled { background: #C7CCD3; border-color: #C7CCD3; color: #fff; box-shadow: none; transform: none; cursor: not-allowed; }

.btn-outline-ink {
    background: #fff;
    border: 1.5px solid var(--ink);
    color: var(--ink);
    border-radius: var(--radius-sm);
    font-weight: 600;
}
.btn-outline-ink:hover { background: var(--ink); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-xs); }

.btn-link-quiet {
    background: none;
    border: none;
    color: var(--accent-blue);
    font-size: 13px;
    padding: 0;
    text-decoration: underline;
}

/* ---------- Segmented control (mode switch) ---------- */
.segmented {
    display: flex;
    gap: 4px;
    background: #EEF0F3;
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius);
    padding: 4px;
}
.segmented .seg-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.segmented .seg-btn.active { background: #fff; color: var(--ink); box-shadow: var(--shadow-xs); }
.segmented .seg-btn:hover:not(.active) { color: var(--ink-soft); }

.mode-detail {
    margin-top: 14px;
    padding: 14px 16px;
    background: #F7F9FB;
    border: 1px dashed var(--rule);
    border-radius: var(--radius-sm);
}

/* ---------- Angle preset buttons ---------- */
.angle-presets { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.angle-preset-btn {
    font-family: var(--font-mono);
    font-size: 12.5px;
    border: 1.5px solid var(--rule);
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 6px 11px;
    color: var(--ink-soft);
    cursor: pointer;
    transition: all 0.15s var(--ease);
}
.angle-preset-btn:hover { border-color: var(--ink-softer); }
.angle-preset-btn.active { background: var(--ink); border-color: var(--ink); color: #fff; transform: translateY(-1px); }

/* ---------- Color presets ---------- */
.color-presets { display: flex; align-items: center; gap: 10px; }
.color-swatch {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: 2px solid #fff;
    outline: 1.5px solid var(--rule);
    cursor: pointer;
    transition: transform 0.15s var(--ease), outline-color 0.15s var(--ease);
}
.color-swatch:hover { transform: scale(1.12); }
.color-swatch.active { outline: 2.5px solid var(--ink); outline-offset: 2px; }

/* ---------- Upload dropzone ---------- */
.dropzone {
    border: 2px dashed var(--rule);
    border-radius: var(--radius);
    background: #F9FAFB;
    padding: 42px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}
.dropzone:hover { border-color: var(--accent-blue); background: #F1F5FA; }
.dropzone.dragover { border-color: var(--accent-blue); background: #EAF1FA; transform: scale(1.01); }
.dropzone .icon {
    color: var(--accent-blue);
    margin-bottom: 10px;
    display: inline-flex;
    transition: transform 0.3s var(--ease);
}
.dropzone:hover .icon { transform: translateY(-3px); }
.dropzone .primary-text { font-weight: 600; font-size: 15px; }
.dropzone .secondary-text { font-size: 12.5px; color: var(--text-muted); margin-top: 2px; }
.dropzone .file-name { font-family: var(--font-mono); font-size: 13px; color: var(--ink); margin-top: 10px; }

/* ---------- Canvas frame + wrap (the signature element) ---------- */
.canvas-frame {
    position: relative;
    display: inline-block;
    max-width: 100%;
    padding: 14px;
    background: linear-gradient(180deg, #fbfbfc, #f3f4f6);
    border: 1px solid var(--rule-soft);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}
.canvas-frame::before, .canvas-frame::after,
.canvas-frame .corner-tl, .canvas-frame .corner-br {
    content: "";
    position: absolute;
    width: 16px; height: 16px;
    border-color: var(--accent-blue);
    opacity: 0.55;
}
.canvas-frame::before { top: 6px; left: 6px; border-top: 2px solid; border-left: 2px solid; }
.canvas-frame::after { bottom: 6px; right: 6px; border-bottom: 2px solid; border-right: 2px solid; }

/* canvas-wrap now matches the canvas's box EXACTLY (no border/padding of
   its own) so pixel<->pt math never has to account for an offset. All
   decorative framing lives on the parent .canvas-frame instead. */
.canvas-wrap {
    position: relative;
    display: inline-block;
    max-width: 100%;
    line-height: 0;
    cursor: crosshair;
}
.canvas-wrap canvas { display: block; max-width: 100%; height: auto; background: #fff; }
.canvas-wrap .canvas-loading {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: repeating-linear-gradient(45deg, #f3f4f6 0 10px, #eceef1 10px 20px);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 12.5px;
}

.drag-hint {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 11px;
    background: var(--ink);
    color: #fff;
    padding: 5px 10px;
    border-radius: 20px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0.92;
    animation: hint-pulse 1.8s ease-in-out infinite;
    z-index: 5;
}
@keyframes hint-pulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 0.95; } }
.drag-hint.hidden { display: none; }

.stamp-preview {
    position: absolute;
    left: 0;
    top: 0;
    transform-origin: top left;
    cursor: grab;
    user-select: none;
    white-space: nowrap;
    padding: 4px 8px 4px 6px;
    line-height: 1.15;
    will-change: transform;
    transition: filter 0.15s var(--ease);
}
.stamp-preview:hover { filter: drop-shadow(0 0 0 transparent); }
.stamp-preview:active, .stamp-preview.dragging { cursor: grabbing; }
.stamp-preview.dragging { filter: drop-shadow(0 4px 10px rgba(23,33,58,0.35)); }
.stamp-preview .stamp-main {
    display: block;
    opacity: 0.86;
    text-shadow: 0 0 0.4px currentColor;
}
.stamp-preview .stamp-sub {
    display: block;
    opacity: 0.8;
}
.stamp-preview.placing { animation: stamp-press 0.25s var(--ease); }
@keyframes stamp-press {
    0% { transform: scale(1) rotate(var(--r, 0deg)); }
    35% { transform: scale(1.1) rotate(calc(var(--r, 0deg) + 1deg)); }
    100% { transform: scale(1) rotate(var(--r, 0deg)); }
}

/* faint ink-stamp ring, reinforces the "rubber stamp" read */
.stamp-preview::before {
    content: "";
    position: absolute;
    inset: -7px -11px;
    border: 1px solid currentColor;
    border-radius: 5px;
    opacity: 0.18;
    pointer-events: none;
}
/* small drag-handle affordance in the corner of the stamp */
.stamp-preview::after {
    content: "";
    position: absolute;
    top: -5px; left: -9px;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.35;
    pointer-events: none;
}

/* ---------- Progress ---------- */
.progress-track {
    height: 9px;
    background: var(--rule-soft);
    border-radius: 5px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), #3567AE);
    background-size: 200% 100%;
    border-radius: 5px;
    transition: width 0.35s var(--ease);
}
.progress-fill.active {
    background-image: linear-gradient(90deg, var(--accent-blue), #3567AE),
        repeating-linear-gradient(-45deg, rgba(255,255,255,0.18) 0 10px, transparent 10px 20px);
    animation: stripe-move 1s linear infinite;
}
@keyframes stripe-move { from { background-position: 0 0, 0 0; } to { background-position: 0 0, 28px 0; } }
.progress-status {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--text-muted);
    margin-top: 7px;
    display: flex; align-items: center; gap: 6px;
}

/* ---------- Status badges ---------- */
.badge-state {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 20px;
}
.badge-state.pending { background: #FBF1DE; color: var(--amber-pending); }
.badge-state.done { background: #E5F1EA; color: var(--success-green); }
.badge-state.error { background: #FBE6E7; color: var(--danger); }

/* ---------- Toast alert ---------- */
.toast-alert {
    position: fixed;
    top: 18px;
    left: 50%;
    transform: translateX(-50%) translateY(-16px);
    z-index: 1080;
    max-width: min(92vw, 480px);
    background: #fff;
    border: 1px solid var(--accent-red-soft);
    border-left: 4px solid var(--accent-red);
    color: #7A1B21;
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 13.5px;
    box-shadow: var(--shadow-lift);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.toast-alert.show { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.toast-alert .toast-icon { flex-shrink: 0; margin-top: 1px; }
.toast-alert .toast-close { margin-left: auto; background: none; border: none; color: #7A1B21; opacity: 0.6; cursor: pointer; flex-shrink: 0; }
.toast-alert .toast-close:hover { opacity: 1; }

/* ---------- Footer note ---------- */
.footnote {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 28px;
    padding-top: 14px;
    border-top: 1px solid var(--rule-soft);
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

/* ---------- Utility ---------- */
.section-gap { margin-top: 24px; }
.mono { font-family: var(--font-mono); }
.text-muted-soft { color: var(--text-muted); }