/* ============================================================
   MOBILE UI — iOS-style native app layout
   Only visible on screens <= 640px
   ============================================================ */

/* Layout */
#mobile-app {
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    background: var(--hsg-bg);
    position: relative;
}
#mobile-view {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 16px 90px 16px;
    padding-bottom: calc(90px + env(safe-area-inset-bottom));
}

/* ---- Bottom Tab Bar ---- */
#mobile-tab-bar {
    display: flex !important;
    flex-direction: row !important;
    justify-content: space-around;
    align-items: center;
    background: var(--hsg-white);
    border-top: 0.5px solid var(--hsg-border);
    padding: 8px 0;
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    user-select: none;
    -webkit-user-select: none;
}
body.dark #mobile-tab-bar {
    background: rgba(20,20,20,.92);
    border-top-color: #2d2d2d;
}
.m-tab-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    background: none;
    border: none;
    padding: 4px 16px;
    cursor: pointer;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
}
.m-tab-btn svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: var(--hsg-text-secondary);
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.m-tab-btn span {
    font-size: .62rem;
    font-weight: 600;
    color: var(--hsg-text-secondary);
    letter-spacing: .02em;
}
.m-tab-btn.m-tab-active svg {
    stroke: var(--hsg-green);
}
.m-tab-btn.m-tab-active span {
    color: var(--hsg-green);
}

/* ---- Mobile Header ---- */
.m-header {
    padding: calc(16px + env(safe-area-inset-top)) 0 8px;
}
.m-header-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--hsg-text);
    letter-spacing: -.03em;
}
.m-header-subtitle {
    font-size: .82rem;
    color: var(--hsg-text-secondary);
    margin-top: 2px;
}

/* ---- Cards ---- */
.m-card {
    background: var(--hsg-white);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
body.dark .m-card {
    background: #1a1a1a;
    box-shadow: 0 1px 4px rgba(0,0,0,.3);
}
.m-card-title {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--hsg-text-secondary);
    margin-bottom: 10px;
    padding-left: 2px;
}

/* ---- Subject Cards ---- */
.m-subj-card {
    background: var(--hsg-white);
    border-radius: 14px;
    padding: 14px 16px;
    margin-bottom: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: transform .1s;
}
body.dark .m-subj-card {
    background: #1a1a1a;
    box-shadow: 0 1px 4px rgba(0,0,0,.3);
}
.m-subj-card:active {
    transform: scale(0.98);
}
.m-subj-info {
    flex: 1;
    min-width: 0;
}
.m-subj-name {
    font-size: .95rem;
    font-weight: 600;
    color: var(--hsg-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.m-subj-meta {
    font-size: .75rem;
    color: var(--hsg-text-secondary);
    margin-top: 2px;
}
.m-subj-bar {
    width: 100%;
    height: 5px;
    background: var(--hsg-border);
    border-radius: 3px;
    margin-top: 8px;
    overflow: hidden;
}
body.dark .m-subj-bar { background: #333; }
.m-subj-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width .3s ease;
}
.m-subj-pct {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--hsg-text);
    min-width: 44px;
    text-align: right;
}
.m-subj-exam {
    display: inline-block;
    font-size: .68rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 6px;
    margin-top: 4px;
}
.m-subj-exam.countdown-urgent { background: #fef2f2; color: #dc2626; }
.m-subj-exam.countdown-soon { background: #fefce8; color: #ca8a04; }
.m-subj-exam.countdown-ok { background: #f0fdf4; color: #16a34a; }
body.dark .m-subj-exam.countdown-urgent { background: #450a0a; color: #ef4444; }
body.dark .m-subj-exam.countdown-soon { background: #422006; color: #eab308; }
body.dark .m-subj-exam.countdown-ok { background: #052e16; color: #22c55e; }

/* ---- Progress Ring (small) ---- */
.m-progress-ring {
    width: 72px;
    height: 72px;
    display: block;
    margin: 0 auto 8px;
}
.m-progress-ring circle {
    fill: none;
    stroke-width: 6;
    stroke-linecap: round;
}
.m-progress-ring .ring-bg { stroke: var(--hsg-border); }
body.dark .m-progress-ring .ring-bg { stroke: #333; }
.m-progress-ring .ring-fill {
    stroke: var(--hsg-green);
    transition: stroke-dashoffset .5s ease;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}
.m-ring-text {
    font-size: 1.1rem;
    font-weight: 700;
    fill: var(--hsg-text);
    text-anchor: middle;
    dominant-baseline: central;
}

/* ---- Subject Detail View ---- */
.m-detail {
    position: fixed;
    inset: 0;
    z-index: 150;
    background: var(--hsg-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.m-detail-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
    background: var(--hsg-white);
    border-bottom: 0.5px solid var(--hsg-border);
}
body.dark .m-detail-header {
    background: #111;
    border-bottom-color: #2d2d2d;
}
.m-back-btn {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--hsg-green);
    font-size: .95rem;
    font-weight: 600;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 2px;
    -webkit-tap-highlight-color: transparent;
}
.m-back-btn svg {
    width: 18px;
    height: 18px;
    stroke: var(--hsg-green);
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.m-detail-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--hsg-text);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.m-detail-body {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 12px 16px;
    padding-bottom: calc(100px + env(safe-area-inset-bottom));
}
.m-detail-progress {
    width: 100%;
    height: 6px;
    background: var(--hsg-border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}
body.dark .m-detail-progress { background: #333; }
.m-detail-progress-fill {
    height: 100%;
    border-radius: 3px;
    background: var(--hsg-green);
    transition: width .3s ease;
}

/* ---- Stat Cards Row ---- */
.m-stats-row {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
}
.m-stat-card {
    flex: 1;
    background: var(--hsg-white);
    border-radius: 10px;
    padding: 10px 6px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-stat-card {
    background: #1a1a1a;
    box-shadow: 0 1px 3px rgba(0,0,0,.3);
}
.m-stat-num {
    font-size: 1.15rem;
    font-weight: 700;
}
.m-stat-label {
    font-size: .6rem;
    color: var(--hsg-text-secondary);
    margin-top: 1px;
    text-transform: uppercase;
    letter-spacing: .03em;
}

/* ---- Topic Row (in subject detail) ---- */
.m-topic {
    background: var(--hsg-white);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-topic {
    background: #1a1a1a;
    box-shadow: 0 1px 3px rgba(0,0,0,.3);
}
.m-topic-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}
.m-topic-name {
    font-size: .88rem;
    font-weight: 600;
    color: var(--hsg-text);
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.m-topic-pct {
    font-size: .78rem;
    font-weight: 700;
    color: var(--hsg-text-secondary);
    margin-left: 8px;
}
.m-topic-chips {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}
.m-add-topic-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px;
    margin-top: 16px;
    border: 1.5px dashed var(--hsg-border);
    border-radius: 14px;
    background: transparent;
    color: var(--hsg-green);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.m-add-topic-btn:active {
    background: rgba(52,199,89,.08);
}
body.dark .m-add-topic-btn {
    border-color: #3a3a3c;
}
/* ---- Topic delete button ---- */
.m-topic-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-left: 6px;
    flex-shrink: 0;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--hsg-text-secondary);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    padding: 0;
}
.m-topic-delete svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}
.m-topic-delete:active {
    background: rgba(255,59,48,.12);
    color: #ff3b30;
}
/* ---- Categories section ---- */
.m-section-label {
    font-size: .75rem;
    font-weight: 700;
    color: var(--hsg-text-secondary);
    text-transform: uppercase;
    letter-spacing: .04em;
    margin: 24px 0 10px 2px;
}
.m-categories-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.m-category-tag {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 7px 10px;
    background: var(--hsg-white);
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-category-tag {
    background: #1a1a1a;
    box-shadow: 0 1px 3px rgba(0,0,0,.3);
}
.m-category-tag-name {
    font-size: .82rem;
    font-weight: 600;
    color: var(--hsg-text);
}
.m-category-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--hsg-text-secondary);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    padding: 0;
}
.m-category-delete svg {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    stroke-width: 2.5;
    fill: none;
}
.m-category-delete:active {
    background: rgba(255,59,48,.12);
    color: #ff3b30;
}
/* ---- Delete subject button ---- */
.m-delete-subject-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px;
    margin-top: 32px;
    border: none;
    border-radius: 14px;
    background: transparent;
    color: #ff3b30;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.m-delete-subject-btn:active {
    background: rgba(255,59,48,.1);
}
.m-status-chip {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 9px;
    border-radius: 8px;
    font-size: .68rem;
    font-weight: 600;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    background: var(--hsg-bg);
    color: var(--hsg-text-secondary);
    transition: all .1s;
    user-select: none;
    -webkit-user-select: none;
}
body.dark .m-status-chip { background: #222; }
.m-status-chip:active { transform: scale(0.93); }
.m-chip-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.m-chip-dot.s-none { background: #666; }
.m-chip-dot.s-progress { background: #d4a843; }
.m-chip-dot.s-review { background: #a78bfa; }
.m-chip-dot.s-done { background: #00b87a; }
.m-chip-dot.s-rep1 { background: #2563eb; }
.m-chip-dot.s-rep2 { background: #0ea5e9; }
.m-chip-dot.s-rep3 { background: #06b6d4; }
.m-status-chip.active-done { background: rgba(0,184,122,.12); color: #00b87a; }
.m-status-chip.active-progress { background: rgba(212,168,67,.12); color: #d4a843; }
.m-status-chip.active-review { background: rgba(167,139,250,.12); color: #a78bfa; }
.m-status-chip.active-rep1 { background: rgba(37,99,235,.12); color: #2563eb; }
.m-status-chip.active-rep2 { background: rgba(14,165,233,.12); color: #0ea5e9; }
.m-status-chip.active-rep3 { background: rgba(6,182,212,.12); color: #06b6d4; }

/* ---- Daily Goal Card ---- */
.m-goal-card {
    display: flex;
    align-items: center;
    gap: 14px;
}
.m-goal-ring {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}
.m-goal-ring circle { fill: none; stroke-width: 4; stroke-linecap: round; }
.m-goal-ring .ring-bg { stroke: var(--hsg-border); }
body.dark .m-goal-ring .ring-bg { stroke: #333; }
.m-goal-ring .ring-fill { stroke: var(--hsg-green); transform: rotate(-90deg); transform-origin: 50% 50%; }
.m-goal-text { font-size: .75rem; font-weight: 700; fill: var(--hsg-text); text-anchor: middle; dominant-baseline: central; }
.m-goal-info { flex: 1; }
.m-goal-info-title { font-size: .88rem; font-weight: 600; color: var(--hsg-text); }
.m-goal-info-sub { font-size: .75rem; color: var(--hsg-text-secondary); margin-top: 1px; }

/* ---- To-Do Mobile ---- */
.m-todo-filters {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
}
.m-todo-filter {
    padding: 6px 14px;
    border-radius: 20px;
    border: none;
    background: var(--hsg-white);
    color: var(--hsg-text-secondary);
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-todo-filter { background: #1a1a1a; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.m-todo-filter.active {
    background: var(--hsg-green);
    color: #fff;
}
.m-todo-item {
    background: var(--hsg-white);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 6px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-todo-item { background: #1a1a1a; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.m-todo-check {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--hsg-border);
    flex-shrink: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
    -webkit-tap-highlight-color: transparent;
    transition: all .15s;
    font-size: .65rem;
}
body.dark .m-todo-check { border-color: #444; }
.m-todo-check.checked {
    background: var(--hsg-green);
    border-color: var(--hsg-green);
    color: #fff;
}
.m-todo-info { flex: 1; min-width: 0; }
.m-todo-title { font-size: .88rem; font-weight: 600; color: var(--hsg-text); }
.m-todo-title.done { text-decoration: line-through; opacity: .4; }
.m-todo-meta { font-size: .72rem; color: var(--hsg-text-secondary); margin-top: 3px; display: flex; gap: 8px; flex-wrap: wrap; }
.m-todo-badge { font-size: .65rem; font-weight: 700; padding: 1px 6px; border-radius: 4px; }
.m-todo-badge.prio-high { background: #fef2f2; color: #dc2626; }
.m-todo-badge.prio-medium { background: #fefce8; color: #ca8a04; }
.m-todo-badge.prio-low { background: #f0fdf4; color: #16a34a; }
body.dark .m-todo-badge.prio-high { background: #450a0a; color: #ef4444; }
body.dark .m-todo-badge.prio-medium { background: #422006; color: #eab308; }
body.dark .m-todo-badge.prio-low { background: #052e16; color: #22c55e; }

.m-fab {
    position: fixed;
    bottom: calc(76px + env(safe-area-inset-bottom));
    right: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--hsg-green);
    color: #fff;
    border: none;
    font-size: 1.4rem;
    font-weight: 300;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0,0,0,.25);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    -webkit-tap-highlight-color: transparent;
}
.m-fab:active { transform: scale(0.9); }

/* ---- Settings ---- */
.m-settings-group {
    background: var(--hsg-white);
    border-radius: 14px;
    overflow: hidden;
    margin-bottom: 14px;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
body.dark .m-settings-group { background: #1a1a1a; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.m-settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 16px;
    border-bottom: 0.5px solid var(--hsg-border);
    font-size: .9rem;
    color: var(--hsg-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
body.dark .m-settings-row { border-bottom-color: #2d2d2d; }
.m-settings-row:last-child { border-bottom: none; }
.m-settings-row:active { background: var(--hsg-border-light); }
.m-settings-label { font-weight: 500; }
.m-settings-value { color: var(--hsg-text-secondary); font-size: .82rem; }
.m-settings-row.danger { color: var(--hsg-danger); }

/* iOS toggle switch */
.m-toggle {
    width: 44px;
    height: 26px;
    border-radius: 13px;
    background: var(--hsg-border);
    border: none;
    cursor: pointer;
    position: relative;
    transition: background .2s;
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}
body.dark .m-toggle { background: #444; }
.m-toggle.on { background: var(--hsg-green); }
.m-toggle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
    transition: transform .2s;
}
.m-toggle.on::after { transform: translateX(18px); }

/* ---- Slide Animations ---- */
.m-slide-in { animation: mSlideIn .28s cubic-bezier(.25,.46,.45,.94) forwards; }
.m-slide-out { animation: mSlideOut .22s cubic-bezier(.25,.46,.45,.94) forwards; }
@keyframes mSlideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
@keyframes mSlideOut { from { transform: translateX(0); } to { transform: translateX(100%); } }

/* ---- Empty State ---- */
.m-empty {
    text-align: center;
    padding: 32px 20px;
    color: var(--hsg-text-secondary);
}
.m-empty-icon { font-size: 2rem; margin-bottom: 10px; }
.m-empty-text { font-size: .88rem; line-height: 1.5; }

/* ---- Mobile Status Dropdown (bottom sheet) ---- */
.m-dropdown-backdrop {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: rgba(0,0,0,.4);
}
.m-dropdown-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 301;
    background: var(--hsg-white);
    border-radius: 18px 18px 0 0;
    padding: 8px 0;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
    transform: translateY(100%);
    transition: transform .25s cubic-bezier(.25,.46,.45,.94);
}
body.dark .m-dropdown-sheet {
    background: #1a1a1a;
}
.m-dropdown-sheet.m-dropdown-visible {
    transform: translateY(0);
}
.m-dropdown-title {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--hsg-text-secondary);
    padding: 10px 20px 6px;
}
.m-dropdown-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    font-size: 1rem;
    color: var(--hsg-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.m-dropdown-option:active {
    background: var(--hsg-border-light);
}
.m-dropdown-option.m-dropdown-selected {
    font-weight: 600;
}
.m-dropdown-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    background: rgba(128,128,128,.1);
}
.m-dropdown-label {
    flex: 1;
}
.m-dropdown-check {
    color: var(--hsg-green);
    font-size: 1.1rem;
    font-weight: 700;
}

/* ---- iOS Install Guide: force light everywhere ---- */
html.ios-install,
html.ios-install body {
    background: #f4f4f5 !important;
    overflow: hidden !important;
    height: 100% !important;
}
html.ios-install #mobile-app {
    display: flex !important;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 9999;
    background: #f4f4f5 !important;
}
html.ios-install #mobile-view {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 !important;
    background: #f4f4f5 !important;
}
html.ios-install main.content,
html.ios-install .hsg-footer,
html.ios-install .hsg-header,
html.ios-install .hsg-nav,
html.ios-install #landing,
html.ios-install #app {
    display: none !important;
}

/* ---- iOS Install Guide (light to match Safari bar) ---- */
.m-install-guide {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: 40px 24px calc(120px + env(safe-area-inset-bottom));
    text-align: center;
    position: relative;
    background: #f4f4f5;
    --hsg-text: #111111;
    --hsg-text-secondary: #6b7280;
    --hsg-bg: #f4f4f5;
    --hsg-border: #e5e7eb;
    --hsg-green: #00875a;
}
.m-install-icon {
    margin-bottom: 16px;
}
.m-install-icon img {
    box-shadow: 0 4px 20px rgba(0,0,0,.3);
}
.m-install-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--hsg-text);
    letter-spacing: -.02em;
    margin-bottom: 8px;
}
.m-install-subtitle {
    font-size: .92rem;
    color: var(--hsg-text-secondary);
    line-height: 1.5;
    max-width: 300px;
    margin-bottom: 32px;
}
.m-install-steps {
    width: 100%;
    max-width: 320px;
    text-align: left;
}
.m-install-step {
    display: flex;
    gap: 14px;
    margin-bottom: 20px;
    align-items: flex-start;
}
.m-install-step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--hsg-green);
    color: #fff;
    font-size: .82rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}
.m-install-step-content {
    flex: 1;
}
.m-install-step-title {
    font-size: .95rem;
    font-weight: 600;
    color: var(--hsg-text);
    margin-bottom: 3px;
}
.m-install-step-desc {
    font-size: .78rem;
    color: var(--hsg-text-secondary);
    line-height: 1.4;
}
.m-install-step-icon {
    margin-top: 8px;
    color: var(--hsg-text-secondary);
    font-size: 1.5rem;
}
.m-install-lang-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(0,0,0,.06);
    border: 1px solid rgba(0,0,0,.1);
    color: #111;
    font-size: .82rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 8px;
    cursor: pointer;
}
.m-install-arrow {
    position: fixed;
    bottom: calc(16px + env(safe-area-inset-bottom));
    right: 44px;
    left: auto;
    transform: none;
    animation: mBounceDown 1.5s ease-in-out infinite;
}
@keyframes mBounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ---- iOS Standalone (PWA) adjustments ---- */
@media (display-mode: standalone) {
    #mobile-app {
        padding-top: env(safe-area-inset-top);
    }
    .m-header {
        padding-top: 8px;
    }
    .m-detail-header {
        padding-top: calc(8px + env(safe-area-inset-top));
    }
}

/* ---- Hide Dev Logs on mobile ---- */
@media(max-width:640px) {
    #debug-toggle { display: none !important; }
    #debug-panel { display: none !important; }
}