/* =====================================================
   Jbooks Viewer CSS — StPageFlip Edition
   ===================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    --jb-bg:      #1a1a2e;
    --jb-surface: #16213e;
    --jb-accent:  #e94560;
    --jb-text:    #e8eaf6;
    --jb-muted:   #8888aa;
    --jb-glow:    rgba(233,69,96,0.35);
    --jb-bar:     64px;
}

/* ── Base ── */
html, body {
    font-family: 'Inter', sans-serif;
    background: var(--jb-bg) !important;
    color: var(--jb-text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Top Bar ── */
.jb-topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--jb-bar);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: rgba(22,33,62,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(233,69,96,0.2);
    box-shadow: 0 2px 24px rgba(0,0,0,0.4);
    z-index: 9999;
    gap: 12px;
}
.jb-topbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}
.jb-logo { font-size: 22px; flex-shrink: 0; }
.jb-title {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.jb-stats {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}
.jb-stat {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--jb-muted);
    background: rgba(255,255,255,0.05);
    padding: 5px 10px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.07);
}
.jb-stat-num { font-weight: 700; color: var(--jb-text); }
.jb-topbar-actions { display: flex; gap: 8px; flex-shrink: 0; }

.jb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: 7px;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.06);
    color: var(--jb-text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition: all 0.18s ease;
    white-space: nowrap;
}
.jb-btn svg {
    display: block;
    flex-shrink: 0;
    transition: transform 0.18s ease;
}
.jb-btn:hover {
    background: rgba(233,69,96,0.2);
    border-color: var(--jb-accent);
    color: #fff;
    transform: translateY(-1px);
}
.jb-btn:hover svg {
    transform: scale(1.08);
}

.jb-btn-accent {
    background: linear-gradient(135deg, var(--jb-accent), #ff6b6b);
    border-color: transparent;
    box-shadow: 0 3px 12px var(--jb-glow);
}
.jb-btn-accent:hover {
    background: linear-gradient(135deg, #d63052, var(--jb-accent));
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--jb-glow);
}

/* ── Stage ── */
.jb-stage {
    padding-top: var(--jb-bar);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse 80% 40% at 50% 0%, rgba(15,52,96,0.45) 0%, transparent 60%),
        var(--jb-bg);
}

/* ── Loading ── */
.jb-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    padding: 60px;
}
.jb-spinner {
    width: 52px; height: 52px;
    border: 3px solid rgba(255,255,255,0.08);
    border-top-color: var(--jb-accent);
    border-radius: 50%;
    animation: jbspin 0.8s linear infinite;
}
@keyframes jbspin { to { transform: rotate(360deg); } }
.jb-progress-bar {
    width: 200px; height: 4px;
    background: rgba(255,255,255,0.08);
    border-radius: 2px;
    overflow: hidden;
}
.jb-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--jb-accent), #ff6b6b);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}
.jb-loading-text { font-size: 13px; color: var(--jb-muted); }

/* ── Error ── */
.jb-error {
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding: 60px 40px;
    text-align: center;
}
.jb-error-icon  { font-size: 48px; }
.jb-error-title { font-size: 20px; font-weight: 700; color: var(--jb-accent); }
.jb-error-msg   { color: var(--jb-muted); font-size: 14px; max-width: 380px; line-height: 1.6; }

/* ── Flipbook Wrapper ── */
.jb-flipbook-wrapper {
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 24px 16px 40px;
    width: 100%;
}

/* ── StPageFlip Book Container ── */
#jb-flipbook {
    position: relative;
    margin: 0 auto;
    filter: drop-shadow(0 30px 60px rgba(0,0,0,0.8));
}
/* StPageFlip injects .stf__parent */
#jb-flipbook .stf__parent {
    background: transparent !important;
}

/* ── Controls ── */
.jb-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(22,33,62,0.92);
    backdrop-filter: blur(16px);
    padding: 10px 18px;
    border-radius: 50px;
    border: 1px solid rgba(255,255,255,0.07);
    box-shadow: 0 6px 24px rgba(0,0,0,0.4);
}
.jb-ctrl-btn {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.06);
    color: var(--jb-text);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.18s ease;
    font-family: inherit;
    padding: 0;
}
.jb-ctrl-btn svg {
    display: block;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    transition: transform 0.18s ease;
}
.jb-ctrl-btn:hover:not(:disabled) {
    background: var(--jb-accent);
    border-color: var(--jb-accent);
    color: #fff;
    transform: scale(1.12);
    box-shadow: 0 0 14px var(--jb-glow);
}
.jb-ctrl-btn:hover:not(:disabled) svg {
    transform: scale(1.08);
}
.jb-ctrl-btn:disabled { opacity: 0.25; cursor: default; }

.jb-page-info {
    padding: 5px 14px;
    background: rgba(255,255,255,0.06);
    border-radius: 20px;
    font-size: 12px;
    color: var(--jb-muted);
    min-width: 70px;
    text-align: center;
    font-weight: 600;
}

/* ── Thumbnail Strip ── */
.jb-thumbs-wrapper {
    width: 100%;
    max-width: 900px;
    overflow-x: auto;
    padding: 6px 0 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--jb-accent) transparent;
}
.jb-thumbs {
    display: flex;
    gap: 6px;
    padding: 0 8px;
    width: max-content;
}
.jb-thumb {
    flex-shrink: 0;
    width: 60px;
    cursor: pointer;
    border-radius: 3px;
    overflow: hidden;
    border: 2px solid transparent;
    transition: all 0.18s ease;
    opacity: 0.5;
}
.jb-thumb:hover { opacity: 0.85; transform: translateY(-3px); }
.jb-thumb.active {
    border-color: var(--jb-accent);
    opacity: 1;
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--jb-glow);
}
.jb-thumb canvas { display: block; width: 100%; height: auto; }
.jb-thumb-num {
    text-align: center;
    font-size: 9px;
    color: var(--jb-muted);
    padding: 2px 0;
    background: rgba(0,0,0,0.6);
}

/* ── Fullscreen ── */
.jb-fullscreen .jb-topbar         { display: none; }
.jb-fullscreen .jb-stage          { padding-top: 0; }
.jb-fullscreen .jb-thumbs-wrapper { display: none; }

/* ── Embed ── */
.jb-embed-mode .jb-topbar { display: none; }
.jb-embed-mode .jb-stage  { padding-top: 8px; }

/* ── Responsive ── */
@media (max-width: 640px) {
    .jb-title { max-width: 120px; font-size: 12px; }
    .jb-stats { display: none; }
    .jb-btn span { display: none; }
    .jb-btn { padding: 7px 10px; }
}