:root {
    /* Ultra-dark foundation */
    --bg: #050507;
    --app-bg: #08080a;
    --panel-bg: #0d0d10;
    --panel-border: #1a1a1f;
    --panel-border-muted: #111115;
    
    --text-primary: #e4e4e7;
    --text-muted: #71717a;
    --text-dim: #3f3f46;
    
    --accent: #818cf8;
    --accent-hard: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.08);
    --accent-pulse: rgba(129, 140, 248, 0.15);
    
    /* Sharp edges */
    --radius-app: 14px;
    --radius-card: 8px;
    --radius-button: 5px;
    --radius-grid: 1px;
    
    /* Spacing */
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 12px;
    --sp-lg: 16px;
    --sp-xl: 24px;
    
    --font-main: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --easing: cubic-bezier(0.16, 1, 0.3, 1);
    --easing-sharp: cubic-bezier(0.33, 1, 0.68, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.01em;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.app-wrapper {
    width: 100%;
    max-width: 420px;
    max-height: calc(100vh - 32px);
    aspect-ratio: 9 / 18.5;
    background: var(--app-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-app);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.02),
        0 40px 100px -20px rgba(0, 0, 0, 0.7),
        0 0 80px -20px rgba(99, 102, 241, 0.06);
}

@media (max-height: 700px) {
    .app-wrapper {
        aspect-ratio: auto;
        height: calc(100vh - 32px);
    }
}

.scroll-container {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 100px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.scroll-container::-webkit-scrollbar {
    display: none;
}

/* --- Panel Layout --- */
.panel {
    background: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border-muted);
    padding: var(--sp-lg) var(--sp-lg);
}

/* --- Header --- */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--panel-border);
    padding: 14px var(--sp-lg);
    background: var(--app-bg);
    position: relative;
    z-index: 50;
}

/* Subtle scanline texture */
.panel-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(255, 255, 255, 0.008) 2px,
        rgba(255, 255, 255, 0.008) 4px
    );
    pointer-events: none;
}

.app-identity {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-primary);
    text-transform: uppercase;
}

.install-trigger {
    display: none;
    background: transparent;
    border: 1px solid var(--panel-border);
    padding: 4px 10px;
    border-radius: var(--radius-button);
    font-size: 10px;
    font-weight: 700;
    font-family: var(--font-main);
    color: var(--text-dim);
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.15s var(--easing);
    text-transform: uppercase;
}

.install-trigger:hover {
    border-color: var(--accent-hard);
    color: var(--accent);
}

.install-trigger:active {
    background: var(--accent-glow);
    border-color: var(--accent-hard);
    color: var(--accent);
    transform: scale(0.96);
}

/* --- Stats Panel --- */
.stats-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: var(--panel-bg);
    border-bottom: 1px solid var(--panel-border-muted);
}

.stat-unit {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 2px;
}

.stat-value {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.03em;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(180deg, var(--text-primary) 40%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Progress Bar */
.progress-track-engineered {
    grid-column: span 2;
    height: 3px;
    background: var(--panel-border-muted);
    border-radius: var(--radius-grid);
    overflow: hidden;
    margin-top: var(--sp-sm);
    position: relative;
}

.progress-fill-engineered {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-hard) 0%, var(--accent) 60%, #c4b5fd 100%);
    width: 0%;
    transition: width 0.8s var(--easing);
    position: relative;
    box-shadow: 0 0 12px var(--accent-pulse);
}

/* Pulsing glow on progress tip */
.progress-fill-engineered::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    width: 8px;
    height: 9px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-hard), 0 0 20px var(--accent-pulse);
    animation: progressPulse 2s ease-in-out infinite;
}

@keyframes progressPulse {
    0%, 100% { opacity: 0.6; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* --- Grid Section --- */
.section-meta {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--sp-md);
    display: flex;
    justify-content: space-between;
}

.grid-modular {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 2px;
}

.grid-unit {
    aspect-ratio: 1;
    background: var(--panel-border-muted);
    border-radius: var(--radius-grid);
    transition: background 0.3s var(--easing), box-shadow 0.3s var(--easing);
}

/* Harsher, more vivid intensity scale */
.intensity-1 { background: #13132b; }
.intensity-2 { background: #252566; }
.intensity-3 { background: #4338ca; box-shadow: 0 0 4px rgba(67, 56, 202, 0.2); }
.intensity-4 { background: #818cf8; box-shadow: 0 0 6px rgba(129, 140, 248, 0.3); }

/* Grid unit pop animation on fill */
.grid-unit.intensity-4 {
    animation: gridPop 0.3s var(--easing-sharp);
}

@keyframes gridPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* --- Log Section --- */
.log-panel {
    background: transparent;
    border: none;
    padding-top: var(--sp-lg);
}

.log-item-minimal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--sp-md) 0;
    border-bottom: 1px solid var(--panel-border-muted);
    animation: fadeSlideIn 0.3s var(--easing);
    background: transparent;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
}

.log-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.log-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.log-meta {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 0.02em;
}

.log-points-badge {
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    font-size: 13px;
    color: var(--accent);
    letter-spacing: -0.01em;
}

/* --- Dock Input Bar --- */
.dock-ui {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(8, 8, 10, 0.85);
    backdrop-filter: blur(24px) saturate(120%);
    -webkit-backdrop-filter: blur(24px) saturate(120%);
    border-top: 1px solid var(--panel-border);
    padding: var(--sp-md) var(--sp-lg) calc(var(--sp-md) + env(safe-area-inset-bottom, 24px)) var(--sp-lg);
    display: flex;
    gap: 6px;
    z-index: 1000;
}

.dock-input-group {
    flex: 1;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-button);
    display: flex;
    transition: border-color 0.2s var(--easing);
}

.dock-input-group:focus-within {
    border-color: var(--accent-hard);
    box-shadow: 0 0 0 1px var(--accent-glow);
}

.dock-input-group input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 0 12px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    letter-spacing: -0.01em;
}

.dock-input-group input::placeholder {
    color: var(--text-dim);
    letter-spacing: 0.02em;
}

/* Stepper */
.stepper-ui {
    display: flex;
    background: var(--panel-border);
    border-radius: var(--radius-button);
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.stepper-ui button {
    background: transparent;
    border: none;
    width: 34px;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.1s var(--easing);
    font-family: inherit;
}

.stepper-ui button:active {
    transform: scale(0.82);
    color: var(--accent);
}

.stepper-ui input {
    width: 26px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    text-align: center;
    font-weight: 700;
    font-size: 13px;
    pointer-events: none;
    font-variant-numeric: tabular-nums;
    font-family: inherit;
}

/* Submit Button */
.submit-engine {
    background: var(--accent-hard);
    border: none;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-button);
    color: white;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.12s var(--easing);
    position: relative;
    overflow: hidden;
}

.submit-engine::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.2s;
}

.submit-engine:hover::before {
    opacity: 1;
}

.submit-engine:active {
    transform: scale(0.9);
    background: #4338ca;
}

/* --- Empty State --- */
.void-state {
    padding: var(--sp-xl) var(--sp-lg);
    border: 1px dashed var(--panel-border);
    border-radius: var(--radius-button);
    text-align: center;
    color: var(--text-dim);
    font-size: 11px;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Hide Spinners */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

/* --- Responsive --- */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    .app-wrapper {
        border-radius: var(--radius-app);
        border: 1px solid var(--panel-border);
    }
}

/* --- Selection Color --- */
::selection {
    background: var(--accent-hard);
    color: white;
}

::-moz-selection {
    background: var(--accent-hard);
    color: white;
}

/* --- System Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 5, 7, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s var(--easing);
    padding: 16px;
}

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

.modal-content {
    background: var(--app-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-app);
    width: 100%;
    max-width: 320px;
    transform: scale(1);
    transition: transform 0.3s var(--easing);
    box-shadow: 0 20px 40px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,255,255,0.05);
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.95);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--panel-border-muted);
}

.modal-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.12em;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.system-btn {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 12px;
    border-radius: var(--radius-button);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s var(--easing);
    text-transform: uppercase;
}

.system-btn:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.system-btn:active {
    transform: scale(0.98);
}

.danger-zone {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--panel-border-muted);
}

.btn-danger {
    width: 100%;
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.btn-danger:hover {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* --- Level Up Overlay --- */
.level-overlay {
    position: fixed;
    inset: 0;
    background: rgba(99, 102, 241, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.level-overlay.hidden {
    opacity: 0;
}

.level-content {
    text-align: center;
    transform: scale(1);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.level-overlay.hidden .level-content {
    transform: scale(0.8);
}

.level-title {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--accent-hard);
    margin-bottom: 8px;
}

.level-value {
    font-size: 80px;
    font-weight: 900;
    line-height: 1;
    color: white;
    text-shadow: 0 0 40px var(--accent-hard), 0 0 100px var(--accent);
}

.level-sub {
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    margin-top: 12px;
}

/* Desktop Delete Button Adjustments */
.log-item-minimal {
    position: relative;
}

.desktop-delete-btn {
    display: none;
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: #ef4444;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: var(--radius-button);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    box-shadow: 0 2px 10px rgba(239, 68, 68, 0.3);
}

/* Show delete on hover for fine pointers (mouse) */
@media (hover: hover) and (pointer: fine) {
    .log-item-minimal:hover .desktop-delete-btn {
        display: block;
        animation: fadeIn 0.2s var(--easing);
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-50%) translateX(10px); }
    to { opacity: 1; transform: translateY(-50%) translateX(0); }
}