/* SASEM shared shell: bottom dock + utilities (all modules) */
:root {
    --sasem-dock-bg: rgba(250, 250, 210, 0.96);
    --sasem-dock-border: rgba(160, 145, 95, 0.4);
    --sasem-dock-text: #3d5c5c;
    --sasem-dock-active: #4a7c59;
    --sasem-dock-shadow: 0 -8px 28px rgba(61, 92, 92, 0.14);
    --sasem-safe-bottom: env(safe-area-inset-bottom, 0px);
    --sasem-safe-top: env(safe-area-inset-top, 0px);
    --sasem-dock-h: 72px;
}

/* Base mobile comfort */
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    -webkit-tap-highlight-color: rgba(74, 124, 89, 0.15);
    overscroll-behavior-y: contain;
}

/* Skip link for keyboard users */
.sasem-skip {
    position: absolute;
    left: 12px;
    top: -48px;
    z-index: 2000;
    padding: 10px 14px;
    border-radius: 10px;
    background: #3d5c5c;
    color: #fff;
    font: 700 0.85rem Inter, system-ui, sans-serif;
    text-decoration: none;
    transition: top 0.15s ease;
}

.sasem-skip:focus {
    top: max(12px, var(--sasem-safe-top));
    outline: 3px solid rgba(74, 124, 89, 0.5);
    outline-offset: 2px;
}

/* ---------- Bottom dock ---------- */
.sasem-dock {
    position: fixed;
    left: 50%;
    bottom: max(8px, var(--sasem-safe-bottom));
    transform: translateX(-50%);
    z-index: 1100;
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 0;
    padding: 6px 6px;
    border-radius: 18px;
    background: var(--sasem-dock-bg);
    border: 1px solid var(--sasem-dock-border);
    box-shadow: var(--sasem-dock-shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    width: min(520px, calc(100vw - 12px));
    max-width: calc(100vw - 12px);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* keep above iOS home indicator */
    padding-bottom: max(6px, 0px);
}

.sasem-dock::-webkit-scrollbar {
    display: none;
}

.sasem-dock a {
    flex: 1 1 0;
    min-width: 0;
    min-height: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px 4px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--sasem-dock-text);
    font-family: Inter, system-ui, sans-serif;
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.sasem-dock a span {
    line-height: 1.1;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sasem-dock a i {
    font-size: 1.05rem;
    line-height: 1;
    pointer-events: none;
}

.sasem-dock a:hover,
.sasem-dock a:focus-visible {
    background: rgba(74, 124, 89, 0.12);
    color: var(--sasem-dock-active);
    outline: none;
}

.sasem-dock a.is-active {
    background: linear-gradient(135deg, #4a7c59, #3d5c5c);
    color: #fff;
    box-shadow: 0 3px 10px rgba(74, 124, 89, 0.35);
}

.sasem-dock a:active {
    transform: scale(0.96);
}

/* Very narrow phones: icon-first dock */
@media (max-width: 380px) {
    .sasem-dock {
        width: calc(100vw - 8px);
        border-radius: 16px;
        padding: 4px;
        bottom: max(6px, var(--sasem-safe-bottom));
    }

    .sasem-dock a {
        min-height: 46px;
        padding: 8px 2px 6px;
        font-size: 0;
        gap: 0;
    }

    .sasem-dock a span {
        display: none;
    }

    .sasem-dock a i {
        font-size: 1.15rem;
    }
}

/* Hide legacy single home FAB when dock is present */
body.has-sasem-dock .home-btn {
    display: none !important;
}

body.has-sasem-dock {
    padding-bottom: calc(var(--sasem-dock-h) + var(--sasem-safe-bottom) + 12px) !important;
}

/* ---------- Top bar (modules) ---------- */
.sasem-topbar {
    position: sticky;
    top: 0;
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 14px;
    padding-top: max(10px, var(--sasem-safe-top));
    background: rgba(250, 250, 210, 0.94);
    border-bottom: 1px solid var(--sasem-dock-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 16px rgba(61, 92, 92, 0.06);
}

.sasem-topbar .brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: Inter, system-ui, sans-serif;
    font-weight: 800;
    color: #3d5c5c;
    text-decoration: none;
    font-size: 0.92rem;
    min-width: 0;
}

.sasem-topbar .brand strong {
    white-space: nowrap;
}

.sasem-topbar .brand span {
    opacity: 0.75;
    font-weight: 600;
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sasem-topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.sasem-topbar .pill {
    font-size: 0.68rem;
    font-weight: 700;
    color: #4a7c59;
    background: rgba(74, 124, 89, 0.12);
    border: 1px solid rgba(74, 124, 89, 0.25);
    border-radius: 999px;
    padding: 5px 10px;
    white-space: nowrap;
}

/* ---------- Install / offline / to-top ---------- */
.sasem-install {
    position: fixed;
    left: 12px;
    bottom: calc(var(--sasem-dock-h) + var(--sasem-safe-bottom) + 12px);
    z-index: 1085;
    border: none;
    border-radius: 999px;
    padding: 10px 14px;
    font: 700 0.8rem Inter, system-ui, sans-serif;
    color: #fff;
    background: linear-gradient(135deg, #4a7c59, #0f172a);
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.25);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    touch-action: manipulation;
}

.sasem-install:hover {
    filter: brightness(1.05);
}

.sasem-offline {
    position: fixed;
    top: max(10px, var(--sasem-safe-top));
    left: 50%;
    transform: translateX(-50%) translateY(-120%);
    z-index: 1200;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    font: 700 0.75rem Inter, system-ui, sans-serif;
    color: #7c2d12;
    background: #ffedd5;
    border: 1px solid #fdba74;
    box-shadow: 0 8px 24px rgba(124, 45, 18, 0.15);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
    max-width: calc(100vw - 24px);
}

.sasem-offline.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.sasem-img-broken {
    opacity: 0.55;
    filter: grayscale(0.4);
    outline: 2px dashed rgba(61, 92, 92, 0.35);
}

.sasem-to-top {
    position: fixed;
    right: 12px;
    bottom: calc(var(--sasem-dock-h) + var(--sasem-safe-bottom) + 12px);
    z-index: 1090;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 14px;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, #4a7c59, #3d5c5c);
    box-shadow: 0 8px 20px rgba(61, 92, 92, 0.28);
    transition: opacity 0.2s ease, transform 0.2s ease;
    touch-action: manipulation;
}

.sasem-to-top.is-visible {
    display: inline-flex;
}

.sasem-to-top:hover {
    transform: translateY(-2px);
}

.sasem-to-top:focus-visible {
    outline: 3px solid rgba(74, 124, 89, 0.45);
    outline-offset: 2px;
}

/* Module hub cards on index */
a.icon-card-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    -webkit-tap-highlight-color: transparent;
}

a.icon-card-link:hover,
a.icon-card-link:focus-visible {
    transform: translateY(-3px);
    outline: none;
    box-shadow: 0 12px 28px rgba(61, 92, 92, 0.16);
}

a.icon-card-link:focus-visible {
    outline: 3px solid rgba(74, 124, 89, 0.4);
    outline-offset: 3px;
}

/* Toast */
.sasem-toast-host {
    position: fixed;
    top: max(16px, var(--sasem-safe-top));
    right: 12px;
    z-index: 1400;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
    max-width: min(340px, calc(100vw - 24px));
}

.sasem-toast {
    pointer-events: auto;
    padding: 10px 14px;
    border-radius: 12px;
    background: #0f172a;
    color: #f8fafc;
    font: 600 0.82rem Inter, system-ui, sans-serif;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.28);
    border: 1px solid rgba(148, 163, 184, 0.25);
    animation: sasem-toast-in 0.2s ease;
}

@keyframes sasem-toast-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Slide progress chip (presentation) */
.sasem-slide-chip {
    position: fixed;
    left: 10px;
    top: max(10px, var(--sasem-safe-top));
    z-index: 1070;
    padding: 5px 9px;
    border-radius: 999px;
    font: 700 0.68rem Inter, system-ui, sans-serif;
    color: #3d5c5c;
    background: rgba(250, 250, 210, 0.94);
    border: 1px solid rgba(160, 145, 95, 0.4);
    box-shadow: 0 4px 14px rgba(61, 92, 92, 0.12);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    pointer-events: none;
}

/* Tablet+ */
@media (min-width: 640px) {
    .sasem-dock {
        width: min(560px, calc(100vw - 24px));
        padding: 8px 10px;
        border-radius: 20px;
        bottom: max(12px, var(--sasem-safe-bottom));
    }

    .sasem-dock a {
        min-height: 52px;
        font-size: 0.68rem;
        padding: 8px 8px;
        gap: 3px;
    }

    .sasem-dock a i {
        font-size: 1.12rem;
    }

    .sasem-slide-chip {
        font-size: 0.72rem;
        padding: 6px 10px;
        left: 12px;
    }
}

@media (min-width: 768px) {
    .sasem-dock a {
        min-width: 64px;
        font-size: 0.72rem;
        padding: 10px 10px;
    }

    .sasem-dock a i {
        font-size: 1.15rem;
    }
}

/* Mobile: avoid expensive fixed backgrounds when shell is present */
@media (max-width: 768px) {
    body {
        background-attachment: scroll !important;
    }

    /* Room for dock without huge empty gap on short pages */
    body.has-sasem-dock {
        padding-bottom: calc(80px + var(--sasem-safe-bottom)) !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sasem-dock a,
    .sasem-to-top,
    a.icon-card-link,
    .sasem-toast {
        transition: none;
        animation: none;
    }
}

@media print {
    .sasem-dock,
    .sasem-to-top,
    .sasem-skip,
    .sasem-topbar,
    .sasem-offline,
    .sasem-install,
    .sasem-toast-host,
    .sasem-slide-chip,
    .home-btn {
        display: none !important;
    }

    body.has-sasem-dock {
        padding-bottom: 0 !important;
    }
}