/* ==========================================================================
   Era Battle - Design System & Styling
   ========================================================================== */

:root {
    --bg-color: #080b11;
    --panel-bg: rgba(15, 23, 42, 0.85);
    --border-color: #1e293b;
    --accent-color: #3b82f6;
    --gold-color: #fbbf24;
    --xp-color: #a855f7;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --font-family: 'Outfit', sans-serif;
    --glow-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-drag: none;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#game-container {
    width: min(1280px, 100vw);
    height: min(800px, 100vh);
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at center, #111827 0%, #030712 100%);
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    overflow: hidden;
    position: relative;
}

@media (min-width: 1300px) and (min-height: 820px) {
    #game-container {
        border: 2px solid var(--border-color);
        border-radius: 16px;
    }
}

/* ==========================================================================
   HUD Layout (Top Bar)
   ========================================================================== */

#hud {
    height: 80px;
    background-color: rgba(15, 23, 42, 0.95);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 10;
}

.hud-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.base-health-container {
    width: 250px;
}

.hud-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.health-bar-bg {
    width: 100%;
    height: 12px;
    background-color: #0f172a;
    border: 1px solid #334155;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}

.health-bar-fill {
    height: 100%;
    width: 100%;
    transition: width 0.3s ease;
    border-radius: 5px;
}

.health-bar-fill.player {
    background: linear-gradient(90deg, #059669 0%, #10b981 100%);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.health-bar-fill.enemy {
    background: linear-gradient(90deg, #dc2626 0%, #f87171 100%);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.hud-value {
    font-size: 12px;
    font-weight: 600;
    margin-top: 4px;
    text-align: right;
    display: block;
}

.central-stats {
    display: flex;
    flex-direction: row;
    gap: 16px;
    align-items: center;
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border-color);
    padding: 6px 16px;
    border-radius: 8px;
    min-width: 90px;
}

.era-box {
    min-width: 160px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(147, 51, 234, 0.15) 100%);
    border: 1px solid rgba(147, 51, 234, 0.3);
    box-shadow: inset 0 0 10px rgba(147, 51, 234, 0.1);
}

.stat-label {
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.stat-value {
    font-size: 16px;
    font-weight: 800;
}

.gold-text {
    color: var(--gold-color);
    text-shadow: 0 0 6px rgba(251, 191, 36, 0.3);
}

.era-text {
    font-size: 16px;
    color: #f8fafc;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
}

.xp-text {
    color: var(--xp-color);
    text-shadow: 0 0 6px rgba(168, 85, 247, 0.3);
}

/* ==========================================================================
   Canvas & Camera Wrapper
   ========================================================================== */

#canvas-wrapper {
    flex-grow: 1;
    position: relative;
    background-color: #030712;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

#gameCanvas:active {
    cursor: grabbing;
}

.scroll-indicator {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 60px;
    background-color: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-color);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
    z-index: 5;
    opacity: 0.6;
}

.scroll-indicator:hover {
    opacity: 1;
    background-color: var(--accent-color);
    border-color: #60a5fa;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

#scroll-left-btn {
    left: 10px;
    border-radius: 0 8px 8px 0;
}

#scroll-right-btn {
    right: 10px;
    border-radius: 8px 0 0 8px;
}

#scroll-instructions {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.6);
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 10px;
    color: var(--text-muted);
    pointer-events: none;
    letter-spacing: 0.05em;
    z-index: 4;
}

/* ==========================================================================
   Controls Panel (Footer)
   ========================================================================== */

#controls-panel {
    height: 200px;
    background-color: var(--panel-bg);
    backdrop-filter: blur(10px);
    display: grid;
    grid-template-columns: 2.9fr 1.1fr 1.25fr 1.15fr 0.95fr;
    gap: 14px;
    padding: 14px 20px;
    z-index: 10;
}

.control-group {
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    padding-right: 16px;
}

.control-group:last-child {
    border-right: none;
    padding-right: 0;
}

.control-group h3 {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
}

.buttons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    flex-grow: 1;
}

.control-group:not(:first-child) .buttons-grid {
    grid-template-columns: repeat(2, 1fr);
}

.utility-group .buttons-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(3, 1fr);
    gap: 4px;
}

/* Spawn & Evolve unit cards */
.army-group .buttons-grid.unit-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.unit-card {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.unit-card .unit-btn {
    flex: 1 1 auto;
    padding: 6px 4px;
}

.unit-card .unit-name {
    font-size: 11px;
    line-height: 1.15;
}

.unit-btn.locked-unit {
    border-color: #a16207;
    background: linear-gradient(180deg, #2a2410 0%, #131007 100%);
}

.unit-btn.locked-unit .unit-cost {
    color: #fcd34d;
    font-size: 11px;
}

.evolve-unit-btn {
    flex: 0 0 auto;
    background: linear-gradient(180deg, #4c1d95 0%, #2e1065 100%);
    border-color: #6d28d9;
    padding: 5px 7px;
    gap: 2px;
    align-items: stretch;
    text-align: left;
}

.evolve-unit-btn:hover:not(.disabled):not(:disabled) {
    border-color: #a855f7;
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.3);
}

.evo-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 6px;
    width: 100%;
}

.evo-label {
    font-size: 10.5px;
    font-weight: 800;
    color: #ede9fe;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.evo-cost {
    font-size: 11px;
    font-weight: 800;
    color: var(--gold-color);
    flex: 0 0 auto;
}

.evo-stats {
    font-size: 9px;
    font-weight: 600;
    color: #c4b5fd;
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Small next-level stat line under tower/upgrade buttons */
.btn-stat {
    font-size: 9px;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 3px;
    white-space: nowrap;
}

/* Special group = one prominent button */
.special-group .buttons-grid {
    grid-template-columns: 1fr;
}

/* ==========================================================================
   Buttons Styling
   ========================================================================== */

.btn {
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    color: var(--text-color);
    font-family: var(--font-family);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 8px;
    font-weight: 600;
    transition: all 0.15s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover:not(.disabled):not(:disabled) {
    background-color: #334155;
    border-color: #475569;
    transform: translateY(-2px);
}

.btn:active:not(.disabled):not(:disabled) {
    transform: translateY(0);
}

.btn.disabled, .btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Spawner specific */
.unit-btn {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-color: #334155;
}

.unit-btn:hover:not(.disabled) {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.2);
}

.unit-name {
    font-size: 11px;
    text-align: center;
    line-height: 1.2;
    margin-bottom: 4px;
    color: var(--text-color);
}

.unit-cost {
    font-size: 12px;
    font-weight: 800;
    color: var(--gold-color);
}

/* Towers specific */
.tower-btn {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
}

.tower-label {
    font-size: 11px;
    color: var(--text-color);
    margin-bottom: 4px;
}

.tower-cost {
    font-size: 12px;
    font-weight: 800;
    color: var(--gold-color);
}

/* Evolve button */
.evolve-btn {
    background: linear-gradient(180deg, #6b21a8 0%, #4c1d95 100%);
    border-color: #7e22ce;
}

.evolve-btn:hover:not(.disabled) {
    background: linear-gradient(180deg, #7e22ce 0%, #5b21b6 100%);
    border-color: #a855f7;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.4);
    transform: translateY(-2px);
}

.evolve-btn.ready-to-evolve {
    animation: evolve-glow 1.5s infinite alternate;
}

@keyframes evolve-glow {
    0% {
        box-shadow: 0 0 5px rgba(168, 85, 247, 0.5), inset 0 0 5px rgba(168, 85, 247, 0.3);
        border-color: #a855f7;
    }
    100% {
        box-shadow: 0 0 20px rgba(168, 85, 247, 0.9), inset 0 0 10px rgba(168, 85, 247, 0.6);
        border-color: #d8b4fe;
    }
}

.btn-primary-text {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.btn-sub-text {
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 4px;
}

.evolve-btn.ready-to-evolve .btn-sub-text {
    color: #e9d5ff;
    font-weight: bold;
}

/* Special Button */
.special-btn {
    background: linear-gradient(180deg, #991b1b 0%, #7f1d1d 100%);
    border-color: #b91c1c;
}

.special-btn:hover:not(.disabled) {
    background: linear-gradient(180deg, #b91c1c 0%, #991b1b 100%);
    border-color: #ef4444;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
    transform: translateY(-2px);
}

#special-cooldown-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background-color: rgba(0, 0, 0, 0.6);
    transition: height 0.1s linear;
}

/* System controls */
.system-btn {
    padding: 4px;
    font-size: 11px;
    font-weight: 600;
    height: 100%;
}

.text-danger {
    color: var(--danger-color);
    border-color: rgba(239, 68, 68, 0.3);
}

.text-danger:hover:not(.disabled) {
    border-color: var(--danger-color) !important;
    background-color: rgba(239, 68, 68, 0.1) !important;
}

/* ==========================================================================
   Modals & Overlays
   ========================================================================== */

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: #0f172a;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    width: 580px;
    padding: 32px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    max-height: 90%;
    overflow-y: auto;
}

.modal-content h1 {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, var(--gold-color) 0%, #ef4444 50%, var(--xp-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(0,0,0,0.5);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 24px;
}

.modal-body {
    background-color: rgba(3, 7, 18, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    width: 100%;
    text-align: left;
    margin-bottom: 24px;
}

.modal-body h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-body ul {
    list-style: none;
}

.modal-body li {
    font-size: 12px;
    line-height: 1.6;
    color: #cbd5e1;
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
}

.modal-body li::before {
    content: "•";
    color: var(--accent-color);
    font-size: 16px;
    position: absolute;
    left: 0;
    top: -1px;
}

.modal-body strong {
    color: #fff;
}

.btn-action {
    background: linear-gradient(90deg, #2563eb 0%, #1d4ed8 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 36px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.05em;
    cursor: pointer;
    font-family: var(--font-family);
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-action:hover {
    background: linear-gradient(90deg, #3b82f6 0%, #2563eb 100%);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
    transform: translateY(-2px);
}

/* Stats view for gameover */
.stats-body {
    width: 100%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 8px 0;
}

.stat-item:last-child, .stat-item:nth-last-child(2) {
    border-bottom: none;
}

.stat-item .label {
    font-size: 12px;
    color: var(--text-muted);
}

.stat-item .val {
    font-size: 14px;
    font-weight: 800;
    color: #fff;
}

/* Classes to show victory/defeat colors */
.victory-style h1 {
    background: linear-gradient(135deg, #34d399 0%, #059669 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
}

.defeat-style h1 {
    background: linear-gradient(135deg, #f87171 0%, #dc2626 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
}

/* Quick effects */
.shake-element {
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

.gold-pulse {
    animation: gold-pulse-anim 0.3s ease;
}

@keyframes gold-pulse-anim {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); color: #fff; }
}

.xp-pulse {
    animation: xp-pulse-anim 0.3s ease;
}

@keyframes xp-pulse-anim {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); color: #fff; }
}

/* ==========================================================================
   Zoom controls + multiplayer badge (canvas overlays)
   ========================================================================== */

#zoom-controls {
    position: absolute;
    right: 12px;
    bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(15, 23, 42, 0.78);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 5px 8px;
    z-index: 6;
    backdrop-filter: blur(6px);
}

.zoom-btn {
    width: 30px;
    height: 30px;
    border-radius: 7px;
    border: 1px solid #334155;
    background: #1e293b;
    color: var(--text-color);
    font-size: 18px;
    font-weight: 800;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family);
    transition: all 0.15s ease;
}

.zoom-btn:hover {
    background: var(--accent-color);
    border-color: #60a5fa;
}

.zoom-btn.zoom-fit {
    width: auto;
    padding: 0 12px;
    font-size: 11px;
    letter-spacing: 0.08em;
}

#zoom-label {
    min-width: 44px;
    text-align: center;
    font-size: 12px;
    font-weight: 800;
    color: var(--text-muted);
}

#mp-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.9), rgba(147, 51, 234, 0.9));
    color: #fff;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.12em;
    padding: 5px 14px;
    border-radius: 20px;
    z-index: 6;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

#mp-badge.hidden { display: none; }

/* ==========================================================================
   Main menu (mode selection)
   ========================================================================== */

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    margin-bottom: 18px;
}

.menu-btn-big {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 3px;
    width: 100%;
    padding: 16px 22px;
    border-radius: 12px;
    border: 1px solid #334155;
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    color: var(--text-color);
    cursor: pointer;
    font-family: var(--font-family);
    transition: all 0.18s ease;
}

.menu-btn-big:hover {
    transform: translateY(-2px);
    border-color: var(--accent-color);
    box-shadow: 0 8px 22px rgba(37, 99, 235, 0.25);
}

.menu-btn-big.online {
    background: linear-gradient(180deg, #172554 0%, #0f172a 100%);
}

.menu-btn-big.online:hover {
    border-color: #a855f7;
    box-shadow: 0 8px 22px rgba(168, 85, 247, 0.25);
}

.mb-title {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.mb-sub {
    font-size: 11px;
    color: var(--text-muted);
}

.howto-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-family);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    padding: 6px;
    letter-spacing: 0.05em;
}

.howto-toggle:hover { color: var(--text-color); }

.howto-body {
    display: none;
    margin-top: 8px;
    margin-bottom: 0;
}

.howto-body.open { display: block; }

/* ==========================================================================
   Join / Lobby modals
   ========================================================================== */

.code-input {
    width: 220px;
    text-align: center;
    font-family: var(--font-family);
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: #fff;
    background: #0b1220;
    border: 2px solid #334155;
    border-radius: 12px;
    padding: 14px 10px 14px 24px;
    margin-bottom: 10px;
    outline: none;
}

.code-input:focus {
    border-color: var(--accent-color);
    box-shadow: var(--glow-shadow);
}

.form-error {
    min-height: 18px;
    font-size: 12px;
    color: var(--danger-color);
    margin-bottom: 14px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
}

.btn-secondary {
    background: #1e293b;
    color: var(--text-color);
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-family);
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: #334155;
    border-color: #475569;
}

.lobby-code-wrap {
    width: 100%;
    margin-bottom: 20px;
}

.lobby-code-wrap.hidden { display: none; }

.lobby-code-label {
    display: block;
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.lobby-code-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.lobby-code {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: 0.3em;
    color: #fff;
    padding-left: 0.3em;
    background: linear-gradient(135deg, var(--gold-color) 0%, var(--xp-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-copy { padding: 8px 16px; font-size: 12px; }

.lobby-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(148, 163, 184, 0.25);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    margin: 4px auto 20px;
    animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Online matches can't be paused/restarted locally — MENU (leave) is the only system action */
body.is-multiplayer #restart-btn,
body.is-multiplayer #pause-btn { display: none; }
body.is-multiplayer .utility-group .buttons-grid { grid-template-rows: 1fr; }

/* ==========================================================================
   Responsive tweaks for small / short screens
   ========================================================================== */

@media (max-width: 900px) {
    #controls-panel {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: min-content;
        height: auto;
        max-height: 46%;
        overflow-y: auto;
    }
    #hud { padding: 0 12px; }
    .base-health-container { width: 150px; }
    .era-box { min-width: 110px; }
    .central-stats { gap: 8px; }
    .stat-box { min-width: 64px; padding: 6px 8px; }
    /* Panning is drag-based; drop the arrows + hint so they don't crowd the zoom cluster */
    .scroll-indicator { display: none; }
    #scroll-instructions { display: none; }
}

@media (max-height: 560px) {
    #controls-panel { height: 150px; }
    #hud { height: 64px; }
    #scroll-instructions { display: none; }
}