/* ============================================================
   Secure Docs Viewer — Mobile-first styles
   ============================================================ */

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

:root {
    --sdv-bg:      #111318;
    --sdv-bar-bg:  rgba(14,15,22,0.95);
    --sdv-border:  rgba(255,255,255,.07);
    --sdv-accent:  #6366f1;
    --sdv-text:    #e8eaf0;
    --sdv-muted:   #8b8fa8;
    --sdv-hover:   rgba(255,255,255,.09);
    --sdv-active:  rgba(255,255,255,.16);
    --sdv-bar-h:   52px;
    --sdv-mob-h:   64px;
    --sdv-safe-b:  env(safe-area-inset-bottom, 0px);
    --sdv-safe-l:  env(safe-area-inset-left,   0px);
    --sdv-safe-r:  env(safe-area-inset-right,  0px);
}

/* ── Body (full-page only) ───────────────────────────────────── */
html, body { height: 100%; overflow: hidden; background: var(--sdv-bg); }

.sdv-body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

/* ── Full-page app shell ─────────────────────────────────────── */
.sdv-app {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    height: 100vh;       /* fallback */
    background: var(--sdv-bg);
    color: var(--sdv-text);
    overflow: hidden;
    position: relative;
}

/* Pseudo-fullscreen (iOS Safari fallback) */
.sdv-app.sdv-pseudo-fs {
    position: fixed !important;
    inset: 0 !important;
    z-index: 99999 !important;
    height: 100% !important;
    width:  100% !important;
}

/* Native fullscreen */
.sdv-app:-webkit-full-screen,
.sdv-app:-moz-full-screen,
.sdv-app:fullscreen {
    height: 100%; width: 100%;
}

/* ── Embedded viewer shell ───────────────────────────────────── */
.sdv-viewer-embed {
    display: flex;
    flex-direction: column;
    background: var(--sdv-bg);
    color: var(--sdv-text);
    overflow: hidden;
    position: relative;
    border-radius: 12px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.sdv-viewer-embed.sdv-pseudo-fs {
    position: fixed !important;
    inset: 0 !important;
    z-index: 99999 !important;
    border-radius: 0 !important;
}

/* ── Top bar ─────────────────────────────────────────────────── */
.sdv-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--sdv-bar-h);
    padding: 0 max(4px, var(--sdv-safe-l)) 0 max(4px, var(--sdv-safe-r));
    background: var(--sdv-bar-bg);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid var(--sdv-border);
    flex-shrink: 0;
    gap: 4px;
    z-index: 10;
}

.sdv-bar-left  { display: flex; align-items: center; gap: 4px; flex: 1; min-width: 0; }
.sdv-bar-center{ display: flex; align-items: center; gap: 2px; }
.sdv-bar-right { display: flex; align-items: center; gap: 2px; }

/* ── Icon buttons ────────────────────────────────────────────── */
.sdv-icon-btn {
    display: flex; align-items: center; justify-content: center;
    min-width: 40px; min-height: 40px;
    border: none; border-radius: 8px;
    background: transparent; color: var(--sdv-muted);
    cursor: pointer; padding: 0;
    transition: background .14s, color .14s, transform .1s;
    -webkit-appearance: none;
    text-decoration: none;
}
.sdv-icon-btn svg { width: 20px; height: 20px; pointer-events: none; }
.sdv-icon-btn:hover  { background: var(--sdv-hover); color: var(--sdv-text); }
.sdv-icon-btn:active { background: var(--sdv-active); transform: scale(.88); }
.sdv-icon-btn:disabled { opacity: .25; cursor: default; transform: none; }
.sdv-back { color: var(--sdv-text); }

.sdv-doc-title {
    font-size: 14px; font-weight: 600;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    color: var(--sdv-text); line-height: 1.2;
}

/* ── Page input ──────────────────────────────────────────────── */
.sdv-page-info  { display: flex; align-items: center; gap: 5px; }
.sdv-page-input {
    width: 42px; height: 30px; text-align: center;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 6px; color: var(--sdv-text);
    font-size: 13px; font-weight: 500;
    -moz-appearance: textfield; outline: none;
    transition: border-color .15s;
}
.sdv-page-input::-webkit-inner-spin-button,
.sdv-page-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.sdv-page-input:focus { border-color: var(--sdv-accent); }
.sdv-page-sep, .sdv-total-pages { color: var(--sdv-muted); font-size: 13px; }
.sdv-total-pages { min-width: 18px; }

/* ── Zoom row (desktop bar) ──────────────────────────────────── */
.sdv-zoom-controls { display: flex; align-items: center; gap: 0; }
.sdv-zoom-label    { font-size: 12px; font-weight: 600; color: var(--sdv-muted); min-width: 42px; text-align: center; }

/* ── Desktop-only (hidden on mobile) ────────────────────────── */
.sdv-desktop-only { display: flex !important; }

/* ── Stage ───────────────────────────────────────────────────── */
.sdv-stage {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    background:
        radial-gradient(ellipse at 50% -10%, rgba(99,102,241,.1) 0%, transparent 55%),
        var(--sdv-bg);
}

/* ── Canvas scroll container ─────────────────────────────────── */
.sdv-canvas-wrap {
    position: absolute;
    inset: 0;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* No padding on mobile — canvas fills full width */
    padding: 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.1) transparent;
}
.sdv-canvas-wrap::-webkit-scrollbar { width: 4px; }
.sdv-canvas-wrap::-webkit-scrollbar-track { background: transparent; }
.sdv-canvas-wrap::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 2px; }

/* ── Canvas ──────────────────────────────────────────────────── */
.sdv-canvas {
    display: block;
    /* On mobile: fill full width edge-to-edge */
    max-width: 100%;
    /* transform-origin set by JS during pinch */
    will-change: transform;
    /* Prevent save-image on iOS long press */
    -webkit-touch-callout: none;
    pointer-events: none; /* right-click on canvas is blocked; touch goes to stage */
}

/* ── Overlays (loading / error) ──────────────────────────────── */
.sdv-overlay {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 14px; z-index: 20; padding: 24px;
    background: var(--sdv-bg); text-align: center;
}

.sdv-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,.08);
    border-top-color: var(--sdv-accent);
    border-radius: 50%;
    animation: sdv-spin .75s linear infinite;
}
@keyframes sdv-spin { to { transform: rotate(360deg); } }

.sdv-loading-text { color: var(--sdv-muted); font-size: 13px; }

.sdv-error-icon  { width: 48px; height: 48px; color: #f87171; opacity: .8; }
.sdv-error-text  { color: var(--sdv-muted); font-size: 14px; max-width: 300px; }

/* ── Mobile bottom bar ───────────────────────────────────────── */
.sdv-mobile-bar {
    display: flex; align-items: center; justify-content: space-between;
    height: calc(var(--sdv-mob-h) + var(--sdv-safe-b));
    padding: 0 max(8px, var(--sdv-safe-l)) var(--sdv-safe-b) max(8px, var(--sdv-safe-r));
    background: var(--sdv-bar-bg);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-top: 1px solid var(--sdv-border);
    flex-shrink: 0; gap: 8px; z-index: 10;
}

.sdv-mobile-btn {
    display: flex; align-items: center; justify-content: center;
    min-width: 52px; min-height: 48px;
    border: none; border-radius: 10px;
    background: rgba(255,255,255,.07);
    color: var(--sdv-text); cursor: pointer;
    transition: background .12s, transform .1s;
    flex-shrink: 0; -webkit-appearance: none;
}
.sdv-mobile-btn svg    { width: 24px; height: 24px; }
.sdv-mobile-btn:active { transform: scale(.88); background: var(--sdv-active); }
.sdv-mobile-btn:disabled { opacity: .2; transform: none; }

.sdv-mobile-center {
    display: flex; flex-direction: column;
    align-items: center; gap: 3px; flex: 1;
}
.sdv-mobile-page { font-size: 15px; font-weight: 700; color: var(--sdv-text); }

.sdv-mobile-zoom-row { display: flex; align-items: center; gap: 4px; }

.sdv-mz-btn {
    display: flex; align-items: center; justify-content: center;
    width: 30px; height: 28px;
    border: none; border-radius: 6px;
    background: rgba(255,255,255,.07);
    color: var(--sdv-text); font-size: 18px; font-weight: 300;
    line-height: 1; cursor: pointer;
    transition: background .12s; -webkit-appearance: none;
    padding-bottom: 2px;
}
.sdv-mz-btn:active { background: var(--sdv-active); }

.sdv-m-zoom-level {
    font-size: 11px; font-weight: 600;
    color: var(--sdv-muted); min-width: 38px; text-align: center;
}

/* ── Progress bar ────────────────────────────────────────────── */
.sdv-progress-rail {
    position: absolute; left: 0; right: 0;
    top: var(--sdv-bar-h); height: 2px;
    pointer-events: none; z-index: 15;
}
.sdv-progress-fill {
    height: 100%; width: 0%;
    background: var(--sdv-accent);
    box-shadow: 0 0 8px rgba(99,102,241,.5);
    transition: width .2s ease, opacity .5s ease;
}

/* ── Swipe hint ──────────────────────────────────────────────── */
.sdv-swipe-hint {
    position: absolute;
    bottom: calc(var(--sdv-mob-h) + var(--sdv-safe-b) + 12px);
    left: 50%; transform: translateX(-50%);
    background: rgba(0,0,0,.72);
    color: #fff; font-size: 13px;
    padding: 7px 16px; border-radius: 20px;
    white-space: nowrap; pointer-events: none;
    z-index: 40;
    animation: sdv-hint 2.6s ease forwards;
}
@keyframes sdv-hint {
    0%   { opacity:0; transform: translateX(-50%) translateY(6px); }
    15%  { opacity:1; transform: translateX(-50%) translateY(0); }
    75%  { opacity:1; }
    100% { opacity:0; }
}

/* ── Responsive breakpoints ──────────────────────────────────── */

/* Mobile (≤ 640px) */
@media (max-width: 640px) {
    .sdv-desktop-only { display: none !important; }
    .sdv-doc-title    { font-size: 13px; }
    .sdv-canvas-wrap  { padding: 0; }          /* edge-to-edge */
    .sdv-canvas       { border-radius: 0; box-shadow: none; }
    .sdv-bar          { padding-left: max(4px, var(--sdv-safe-l)); }
}

/* Desktop (> 640px) */
@media (min-width: 641px) {
    /* Page controls and zoom always visible on desktop */
    .sdv-page-controls { display: flex !important; }
    .sdv-zoom-controls { display: flex !important; }
    /* Hide mobile nav on desktop */
    .sdv-mobile-bar { display: none !important; }
    /* Canvas with card shadow */
    .sdv-canvas-wrap { padding: 24px 24px 32px; align-items: center; }
    .sdv-canvas { border-radius: 4px; box-shadow: 0 8px 48px rgba(0,0,0,.7); }
}

/* ── Print block ─────────────────────────────────────────────── */
@media print {
    .sdv-app, .sdv-viewer-embed { display: none !important; }
    body::after {
        content: 'This document cannot be printed.';
        display: block; text-align: center;
        margin-top: 4em; font-size: 1.1em;
    }
}

/* ── Reduced motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .sdv-spinner { animation-duration: 1.5s; }
}

/* ── Shortcode embed container ───────────────────────────────── */
.sdv-embed-wrap {
    width: 100%;
    display: block;
    position: relative;
}
.sdv-embed-wrap .sdv-viewer-embed {
    width: 100%;
    height: 100%;
}