@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Outfit:wght@400;600;700;800&display=swap');

:root {
    --bg: #0f172a;
    --panel: rgba(15, 23, 42, 0.78);
    --border: rgba(255, 255, 255, 0.07);
    --amber: #f59e0b;
    --blue: #3b82f6;
    --cyan: #22d3ee;
    --green: #4ade80;
    --purple: #a855f7;
    --red: #f87171;
    --text: #f8fafc;
    --muted: #64748b;
}

#phet-stage {
    position: absolute;
    top: 0;
    left: 0;
    width: 1280px;
    height: 720px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg);
    transform-origin: top left;
    touch-action: none;
}

body.sim-page {
    font-family: 'Outfit', sans-serif;
    background: var(--bg);
    margin: 0;
    padding: 0;
    overflow: hidden;
    touch-action: none;
}

/* --- PREMIUM SCIENCE-SIM NAVIGATION --- */
.sim-nav {
    position: relative !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 2rem;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 200;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.sim-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5rem;
    color: #f59e0b;
}

.logo-thin {
    font-weight: 300;
}

.nav-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.85rem;
    color: #94a3b8;
}

.nav-breadcrumbs a {
    color: #94a3b8;
    text-decoration: none;
    transition: 0.2s;
}

.nav-breadcrumbs a:hover {
    color: #fff;
}

.nav-breadcrumbs .sep {
    opacity: 0.3;
    color: #fff;
}

.nav-breadcrumbs .current {
    font-weight: 700;
    color: #fff;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-back {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1.2rem;
    background: rgba(255, 255, 255, 0.05);
    color: #94a3b8;
    text-decoration: none;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border);
    transition: 0.2s;
}

.nav-back:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateY(-1px);
}

.sim-main {
    flex: 1;
    padding: 10px 16px 20px;
    width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .65rem;
    overflow: hidden;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.analogy-banner {
    background: linear-gradient(135deg, rgba(245, 158, 11, .08), rgba(59, 130, 246, .06));
    border: 1px solid rgba(245, 158, 11, .25);
    border-radius: 14px;
    padding: .55rem 1rem;
    display: flex;
    align-items: center;
    gap: .7rem;
    flex-wrap: wrap
}

.banner-icons {
    font-size: 1.3rem;
    flex-shrink: 0;
    letter-spacing: .2rem
}

.banner-text {
    flex: 1;
    font-size: .78rem;
    color: #cbd5e1;
    line-height: 1.45;
    min-width: 200px
}

.banner-text strong {
    color: var(--text)
}

.banner-text em {
    color: var(--amber);
    font-style: normal
}

.guided-btn {
    background: linear-gradient(135deg, var(--amber), #f97316);
    color: #020617;
    border: none;
    padding: .35rem .9rem;
    border-radius: 9px;
    font-size: .75rem;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .4rem;
    transition: .3s;
    flex-shrink: 0;
    font-family: inherit
}

.guided-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, .3)
}

.tab-bar {
    display: flex;
    gap: .35rem;
    flex-wrap: wrap;
    background: rgba(30, 41, 59, .4);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .4rem .65rem
}

.topic-tab {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: .28rem .85rem;
    border-radius: 8px;
    font-size: .8rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.topic-tab:hover {
    border-color: var(--amber);
    color: var(--amber)
}

.topic-tab.active {
    background: var(--amber);
    border-color: var(--amber);
    color: #020617
}

.topic-panel {
    display: none
}

.topic-panel.active {
    display: block
}

.topic-layout {
    display: grid;
    grid-template-columns: 1fr 270px;
    gap: .65rem;
    align-items: start
}

.converter-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: .85rem
}

.conv-title {
    font-size: .97rem;
    font-weight: 800
}

.conv-subtitle {
    font-size: .73rem;
    color: var(--muted);
    margin-top: -.6rem
}

.explain-side {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    overflow-y: auto;
}

.explain-side::-webkit-scrollbar {
    width: 2px
}

.explain-side::-webkit-scrollbar-thumb {
    background: #334155
}

.explain-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    padding: .8rem
}

.explain-h {
    font-size: .68rem;
    font-weight: 800;
    color: var(--amber);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: .45rem
}

.explain-card p {
    font-size: .77rem;
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: .35rem
}

/* Mode toggles */
.mode-row {
    display: flex;
    align-items: center;
    gap: .55rem;
    flex-wrap: wrap
}

.mode-lbl {
    font-size: .68rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .5px
}

.mode-toggle {
    display: flex;
    background: rgba(15, 23, 42, .6);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden
}

.mt-btn {
    background: transparent;
    border: none;
    color: var(--muted);
    padding: .25rem .65rem;
    font-size: .75rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.mt-btn:hover {
    color: var(--text)
}

.mt-btn.active {
    background: var(--blue);
    color: #fff
}

/* Bit grid */
.bit-grid-wrap {
    overflow-x: auto
}

.bit-grid {
    display: flex;
    gap: 2px;
    flex-wrap: wrap;
    padding: .5rem;
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    justify-content: center
}

.bit-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    cursor: pointer;
    transition: .2s
}

.bit-cell:hover .bc-val {
    transform: scale(1.1)
}

.bc-pos {
    font-size: .44rem;
    color: rgba(255, 255, 255, .25);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600
}

.bc-val {
    width: 32px;
    height: 32px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: .95rem;
    font-weight: 900;
    border: 2px solid transparent;
    transition: .2s
}

.bc-val.on {
    background: rgba(34, 211, 238, .2);
    border-color: var(--cyan);
    color: var(--cyan);
    box-shadow: 0 0 8px rgba(34, 211, 238, .3)
}

.bc-val.off {
    background: rgba(30, 41, 59, .4);
    border-color: rgba(255, 255, 255, .06);
    color: rgba(255, 255, 255, .2)
}

.bc-wt {
    font-size: .44rem;
    color: rgba(255, 255, 255, .2);
    font-family: 'JetBrains Mono', monospace
}

.bit-group-sep {
    width: 1px;
    background: rgba(255, 255, 255, .1);
    margin: 0 3px;
    align-self: stretch
}

/* 4-base display */
.bases-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .5rem
}

.base-cell {
    display: flex;
    flex-direction: column;
    gap: .25rem
}

.base-label {
    font-size: .65rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .5px
}

.base-input {
    background: rgba(30, 41, 59, .6);
    border: 1px solid rgba(255, 255, 255, .1);
    color: var(--text);
    padding: .4rem .7rem;
    border-radius: 8px;
    font-size: .9rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    width: 100%;
    transition: .2s;
    outline: none
}

.base-input:focus {
    border-color: var(--amber);
    box-shadow: 0 0 0 2px rgba(245, 158, 11, .12)
}

/* Signed bar */
.signed-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: .4rem;
    background: rgba(168, 85, 247, .08);
    border: 1px solid rgba(168, 85, 247, .25);
    border-radius: 8px;
    padding: .4rem .7rem;
    font-size: .73rem;
    color: #c4b5fd
}

.signed-val {
    color: var(--purple);
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace
}

.msb-info {
    font-size: .68rem;
    color: var(--muted)
}

/* Steps box */
.steps-box {
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden
}

.steps-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .45rem .7rem
}

.steps-title {
    font-size: .7rem;
    font-weight: 700;
    color: var(--muted)
}

.steps-toggle {
    background: rgba(59, 130, 246, .12);
    border: 1px solid rgba(59, 130, 246, .25);
    color: var(--blue);
    font-size: .68rem;
    font-weight: 700;
    padding: .2rem .6rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    transition: .2s
}

.steps-toggle:hover {
    background: var(--blue);
    color: #fff
}

.steps-body {
    padding: .5rem .7rem;
    border-top: 1px solid var(--border)
}

.steps-body.hidden {
    display: none
}

.step-div-row {
    display: flex;
    align-items: center;
    gap: .4rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: .72rem;
    color: #94a3b8;
    margin-bottom: .18rem
}

.step-div-row .sd-num {
    color: var(--cyan);
    width: 40px;
    text-align: right
}

.step-div-row .sd-rem {
    color: var(--amber);
    font-weight: 800
}

/* Place value */
.place-value-wrap {
    display: flex;
    gap: .2rem;
    flex-wrap: wrap;
    overflow-x: auto;
    padding: .3rem 0
}

.pv-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: 36px
}

.pv-bit {
    font-family: 'JetBrains Mono', monospace;
    font-size: .85rem;
    font-weight: 800;
    padding: .18rem .3rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, .06)
}

.pv-bit.on {
    background: rgba(245, 158, 11, .15);
    border-color: var(--amber);
    color: var(--amber)
}

.pv-bit.off {
    background: rgba(30, 41, 59, .3);
    color: rgba(255, 255, 255, .15)
}

.pv-mult {
    font-size: .5rem;
    color: var(--muted)
}

.pv-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: .56rem;
    color: var(--muted)
}

/* Example pills */
.example-pills {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem
}

.ex-pill {
    background: rgba(59, 130, 246, .12);
    border: 1px solid rgba(59, 130, 246, .3);
    color: var(--blue);
    padding: .2rem .55rem;
    border-radius: 20px;
    font-size: .73rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.ex-pill:hover {
    background: var(--blue);
    color: #fff
}

/* Mini examples in explain cards */
.mini-example {
    margin: .35rem 0;
    display: flex;
    flex-direction: column;
    gap: .15rem
}

.mini-example div {
    font-size: .72rem;
    color: #94a3b8
}

.mono {
    font-family: 'JetBrains Mono', monospace
}

.cyan {
    color: var(--cyan)
}

/* Overflow btns */
.overflow-btns {
    display: flex;
    gap: .35rem;
    flex-wrap: wrap;
    margin-top: .4rem
}

/* ─── DATA TYPES ─── */
.type-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .4rem
}

.type-card {
    background: rgba(30, 41, 59, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .15rem;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.type-card:hover {
    border-color: var(--amber);
    background: rgba(245, 158, 11, .06)
}

.type-card.active {
    border-color: var(--amber);
    background: rgba(245, 158, 11, .1)
}

.type-icon {
    font-size: 1.1rem
}

.type-name {
    font-size: .78rem;
    font-weight: 800;
    color: var(--text)
}

.type-size {
    font-size: .62rem;
    color: var(--muted)
}

.type-detail {
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .8rem;
    min-height: 80px
}

.td-name {
    font-size: .9rem;
    font-weight: 800;
    margin-bottom: .25rem
}

.td-row {
    font-size: .73rem;
    color: #94a3b8;
    margin-bottom: .15rem
}

.td-row strong {
    color: var(--text)
}

.ieee-float-wrap {
    margin-top: .5rem
}

.ieee-bits-row {
    display: flex;
    gap: 1px;
    flex-wrap: nowrap;
    overflow-x: auto
}

.ieee-bit {
    font-family: 'JetBrains Mono', monospace;
    font-size: .62rem;
    font-weight: 800;
    padding: .2rem .15rem;
    min-width: 14px;
    text-align: center;
    border-radius: 2px
}

.ieee-bit.sign {
    background: rgba(248, 113, 113, .25);
    color: #fca5a5
}

.ieee-bit.exp {
    background: rgba(245, 158, 11, .2);
    color: var(--amber)
}

.ieee-bit.mant {
    background: rgba(34, 211, 238, .15);
    color: var(--cyan)
}

.ieee-legend {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
    margin: .35rem 0;
    font-size: .65rem;
    font-weight: 800
}

.ieee-s {
    background: rgba(248, 113, 113, .15);
    color: #fca5a5;
    padding: .1rem .4rem;
    border-radius: 4px
}

.ieee-e {
    background: rgba(245, 158, 11, .12);
    color: var(--amber);
    padding: .1rem .4rem;
    border-radius: 4px
}

.ieee-m {
    background: rgba(34, 211, 238, .1);
    color: var(--cyan);
    padding: .1rem .4rem;
    border-radius: 4px
}

/* Memory layout */
.mem-layout-wrap {
    margin-top: .3rem
}

.mem-layout-title {
    font-size: .68rem;
    font-weight: 700;
    color: var(--muted);
    margin-bottom: .4rem
}

.mem-layout {
    display: flex;
    gap: 1px;
    flex-wrap: wrap;
    align-items: flex-start
}

.mem-var {
    display: flex;
    flex-direction: column;
    align-items: center
}

.mem-var-label {
    font-size: .58rem;
    color: var(--muted);
    margin-bottom: 2px
}

.mem-var-bytes {
    display: flex;
    gap: 1px
}

.mem-byte {
    width: 36px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: .6rem;
    font-weight: 700;
    background: rgba(30, 41, 59, .5);
    border: 1px solid rgba(255, 255, 255, .07);
    transition: .2s
}

.mem-addr {
    font-size: .5rem;
    color: rgba(255, 255, 255, .2);
    font-family: 'JetBrains Mono', monospace;
    margin-top: 2px
}

/* struct box */
.struct-box {
    background: rgba(15, 23, 42, .7);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .6rem .8rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: .7rem
}

.struct-title {
    color: var(--muted);
    margin: .15rem 0
}

.struct-row {
    padding-left: .8rem;
    color: #94a3b8;
    margin-bottom: .1rem
}

.stype {
    color: var(--cyan)
}

.scomment {
    color: rgba(255, 255, 255, .25)
}

/* ─── BITWISE LAB ─── */
.bw-inputs {
    display: flex;
    flex-direction: column;
    gap: .6rem
}

.bw-in-group {
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .6rem .8rem;
    display: flex;
    flex-direction: column;
    gap: .35rem
}

.bw-label {
    font-size: .78rem;
    font-weight: 800;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: .4rem
}

.bw-dec {
    font-size: .68rem;
    color: var(--muted);
    font-weight: 400
}

.bw-bits {
    display: flex;
    gap: 3px
}

.bw-bit {
    width: 30px;
    height: 30px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: .85rem;
    font-weight: 900;
    border: 1px solid rgba(255, 255, 255, .07);
    cursor: pointer;
    transition: .2s
}

.bw-bit.on {
    background: rgba(34, 211, 238, .2);
    border-color: var(--cyan);
    color: var(--cyan)
}

.bw-bit.off {
    background: rgba(30, 41, 59, .4);
    color: rgba(255, 255, 255, .2)
}

.bw-num-input {
    background: rgba(30, 41, 59, .5);
    border: 1px solid rgba(255, 255, 255, .08);
    color: var(--text);
    padding: .3rem .6rem;
    border-radius: 7px;
    font-size: .85rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    width: 100%;
    outline: none
}

.bw-num-input:focus {
    border-color: var(--amber)
}

.bw-op-bar {
    display: flex;
    gap: .35rem;
    flex-wrap: wrap
}

.bw-op-btn {
    background: rgba(30, 41, 59, .5);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: .28rem .8rem;
    border-radius: 8px;
    font-size: .78rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.bw-op-btn:hover {
    border-color: var(--amber);
    color: var(--amber)
}

.bw-op-btn.active {
    background: var(--amber);
    border-color: var(--amber);
    color: #020617
}

.bw-result-wrap {
    background: rgba(15, 23, 42, .6);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .7rem;
    min-height: 60px
}

.bw-result-op {
    font-family: 'JetBrains Mono', monospace;
    font-size: .72rem;
    margin-bottom: .3rem;
    display: flex;
    gap: 2px
}

.bw-result-row {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-bottom: .2rem
}

.bw-r-lbl {
    font-size: .65rem;
    font-weight: 800;
    width: 30px;
    color: var(--muted)
}

.bw-r-bits {
    display: flex;
    gap: 2px
}

.bwrb {
    font-family: 'JetBrains Mono', monospace;
    font-size: .82rem;
    font-weight: 800;
    width: 20px;
    text-align: center;
    transition: .2s;
    border-radius: 3px;
    padding: 1px 0
}

.bwrb.match {
    background: rgba(245, 158, 11, .2);
    color: var(--amber)
}

.bwrb.zero {
    color: rgba(255, 255, 255, .15)
}

.bwrb.one {
    color: var(--cyan)
}

.bw-r-dec {
    font-family: 'JetBrains Mono', monospace;
    font-size: .78rem;
    color: var(--green);
    font-weight: 700;
    margin-left: .5rem
}

.bw-truth-wrap {
    background: rgba(15, 23, 42, .4);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .5rem .7rem;
    font-size: .7rem;
    color: #94a3b8
}

.truth-op-lbl {
    font-weight: 800;
    color: var(--amber);
    margin-bottom: .3rem
}

.truth-table {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: .15rem .7rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: .7rem
}

.truth-hdr {
    color: var(--muted);
    font-weight: 800;
    font-size: .62rem;
    text-transform: uppercase
}

.truth-1 {
    color: var(--cyan)
}

.truth-0 {
    color: rgba(255, 255, 255, .2)
}

/* ─── TEXT ENCODING ─── */
.enc-mode-row {
    display: flex;
    align-items: center;
    gap: .55rem;
    flex-wrap: wrap
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: .28rem
}

.input-row label {
    font-size: .67rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .6px
}

.input-row input {
    background: rgba(30, 41, 59, .6);
    border: 1px solid rgba(255, 255, 255, .1);
    color: var(--text);
    padding: .45rem .7rem;
    border-radius: 8px;
    font-size: .92rem;
    font-family: inherit;
    font-weight: 600;
    width: 100%;
    outline: none;
    transition: .2s
}

.input-row input:focus {
    border-color: var(--amber)
}

.ascii-table-display {
    display: flex;
    flex-direction: column;
    gap: .25rem;
    max-height: 240px;
    overflow-y: auto
}

.ascii-table-display::-webkit-scrollbar {
    width: 2px
}

.ascii-table-display::-webkit-scrollbar-thumb {
    background: #334155
}

.ascii-row {
    display: flex;
    align-items: center;
    gap: .4rem;
    padding: .28rem .5rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: rgba(30, 41, 59, .3);
    animation: fadeIn .25s ease
}

.ascii-char {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--amber);
    width: 26px;
    text-align: center;
    flex-shrink: 0
}

.ascii-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: .68rem;
    color: var(--muted);
    flex-shrink: 0;
    width: 38px
}

.ascii-hex {
    font-family: 'JetBrains Mono', monospace;
    font-size: .68rem;
    color: var(--purple);
    flex-shrink: 0;
    width: 36px
}

.ascii-bin-wrap {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1
}

.ascii-byte-row {
    display: flex;
    gap: 1px;
    font-family: 'JetBrains Mono', monospace;
    font-size: .65rem
}

.ab1 {
    color: var(--cyan);
    font-weight: 700
}

.ab0 {
    color: rgba(255, 255, 255, .15)
}

.utf8-badge {
    font-size: .58rem;
    font-weight: 800;
    background: rgba(168, 85, 247, .15);
    color: var(--purple);
    border: 1px solid rgba(168, 85, 247, .3);
    padding: .1rem .4rem;
    border-radius: 10px;
    flex-shrink: 0
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-5px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

/* String memory */
.str-memory-wrap {
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .55rem .7rem
}

.str-mem-title {
    font-size: .67rem;
    font-weight: 700;
    color: var(--muted);
    margin-bottom: .4rem
}

.str-memory {
    display: flex;
    gap: 2px;
    flex-wrap: wrap;
    margin-bottom: .3rem
}

.smb {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    animation: fadeIn .2s ease
}

.smb-hex {
    font-family: 'JetBrains Mono', monospace;
    font-size: .65rem;
    font-weight: 800;
    padding: .2rem .35rem;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, .06)
}

.smb-char {
    font-size: .6rem;
    color: var(--muted)
}

.smb-addr {
    font-size: .5rem;
    color: rgba(255, 255, 255, .2);
    font-family: 'JetBrains Mono', monospace
}

.smb-ascii {
    background: rgba(59, 130, 246, .15);
    border-color: rgba(59, 130, 246, .3);
    color: #93c5fd
}

.smb-utf2 {
    background: rgba(168, 85, 247, .15);
    border-color: rgba(168, 85, 247, .3);
    color: #c4b5fd
}

.smb-utf3 {
    background: rgba(34, 211, 238, .15);
    border-color: rgba(34, 211, 238, .3);
    color: var(--cyan)
}

.smb-utf4 {
    background: rgba(74, 222, 128, .15);
    border-color: rgba(74, 222, 128, .3);
    color: var(--green)
}

.smb-null {
    background: rgba(100, 116, 139, .15);
    border-color: rgba(100, 116, 139, .3);
    color: var(--muted)
}

.str-mem-note {
    font-size: .62rem;
    color: var(--muted)
}

.analogy-box {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    background: rgba(245, 158, 11, .05);
    border: 1px solid rgba(245, 158, 11, .13);
    border-radius: 10px;
    padding: .6rem
}

.analogy-emoji {
    font-size: 1.3rem;
    flex-shrink: 0
}

.analogy-text {
    font-size: .76rem;
    color: #cbd5e1;
    line-height: 1.5
}

.analogy-text strong {
    color: var(--text)
}

.analogy-text em {
    color: var(--amber);
    font-style: normal
}

.ex-pill-text {
    background: rgba(59, 130, 246, .12);
    border: 1px solid rgba(59, 130, 246, .3);
    color: var(--blue);
    padding: .2rem .55rem;
    border-radius: 20px;
    font-size: .73rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.ex-pill-text:hover {
    background: var(--blue);
    color: #fff
}

/* ─── COLOUR ─── */
.colour-preview-adv {
    height: 80px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background .25s;
    border: 1px solid rgba(255, 255, 255, .1)
}

.colour-hex-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    font-weight: 900;
    color: #fff;
    text-shadow: 0 1px 6px rgba(0, 0, 0, .7)
}

.colour-name-label {
    font-size: .62rem;
    color: rgba(255, 255, 255, .6);
    margin-top: .15rem
}

.rgb-sliders {
    display: flex;
    flex-direction: column;
    gap: .45rem
}

.rgb-row {
    display: flex;
    align-items: center;
    gap: .45rem
}

.rgb-lbl {
    font-size: .7rem;
    font-weight: 700;
    width: 50px;
    flex-shrink: 0
}

.rgb-slider {
    flex: 1;
    cursor: pointer
}

.r-slider {
    accent-color: #f87171
}

.g-slider {
    accent-color: #4ade80
}

.b-slider {
    accent-color: #60a5fa
}

.rgb-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: .68rem;
    width: 26px;
    text-align: right;
    flex-shrink: 0
}

.rgb-bin {
    font-family: 'JetBrains Mono', monospace;
    font-size: .6rem;
    color: var(--muted);
    min-width: 70px
}

.colour-bits-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1px;
    padding: .4rem;
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 8px
}

.cb-bit {
    width: 18px;
    height: 18px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: .62rem;
    font-weight: 800
}

.cb-r0 {
    background: rgba(248, 113, 113, .08);
    color: rgba(248, 113, 113, .25)
}

.cb-r1 {
    background: rgba(248, 113, 113, .25);
    color: #fca5a5
}

.cb-g0 {
    background: rgba(74, 222, 128, .06);
    color: rgba(74, 222, 128, .2)
}

.cb-g1 {
    background: rgba(74, 222, 128, .2);
    color: var(--green)
}

.cb-b0 {
    background: rgba(96, 165, 250, .06);
    color: rgba(96, 165, 250, .2)
}

.cb-b1 {
    background: rgba(96, 165, 250, .2);
    color: #93c5fd
}

.hex-build {
    background: rgba(15, 23, 42, .5);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .5rem .7rem
}

.hex-build-title {
    font-size: .65rem;
    color: var(--muted);
    font-weight: 700;
    margin-bottom: .35rem
}

.hex-build-row {
    display: flex;
    align-items: center;
    gap: .4rem;
    flex-wrap: wrap
}

.hex-chunk {
    font-family: 'JetBrains Mono', monospace;
    font-size: .95rem;
    font-weight: 900;
    padding: .22rem .5rem;
    border-radius: 6px
}

.r-chunk {
    background: rgba(248, 113, 113, .15);
    color: #fca5a5
}

.g-chunk {
    background: rgba(74, 222, 128, .15);
    color: #86efac
}

.b-chunk {
    background: rgba(96, 165, 250, .15);
    color: #93c5fd
}

.hex-plus {
    color: var(--muted);
    font-weight: 700
}

.hex-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .7rem
}

.hex-table th {
    color: var(--amber);
    text-align: left;
    font-weight: 800;
    font-size: .62rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: .18rem .3rem;
    border-bottom: 1px solid var(--border)
}

.hex-table td {
    padding: .2rem .3rem;
    color: #94a3b8;
    font-family: 'JetBrains Mono', monospace;
    border-bottom: 1px solid rgba(255, 255, 255, .03)
}

.colour-presets {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem
}

.preset-btn {
    background: rgba(30, 41, 59, .6);
    border: 1px solid var(--border);
    color: var(--text);
    padding: .2rem .5rem;
    border-radius: 7px;
    font-size: .7rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.preset-btn:hover {
    border-color: var(--amber);
    background: rgba(245, 158, 11, .1)
}

/* Pixel */
.pixel-editor-wrap {
    display: flex;
    gap: .6rem;
    align-items: flex-start;
    flex-wrap: wrap
}

.pixel-grid {
    display: grid;
    gap: 1px;
    background: rgba(30, 41, 59, .5);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 3px;
    flex-shrink: 0
}

.pixel-cell {
    cursor: pointer;
    border-radius: 2px;
    transition: transform .1s
}

.pixel-cell:hover {
    transform: scale(1.15);
    z-index: 2;
    position: relative
}

.pixel-cell.selected {
    outline: 2px solid #fff;
    outline-offset: 1px
}

.pixel-info {
    background: rgba(15, 23, 42, .6);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: .55rem .7rem;
    flex: 1;
    font-size: .7rem;
    min-width: 150px
}

.pinfo-title {
    font-size: .62rem;
    font-weight: 800;
    color: var(--amber);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: .35rem
}

.pinfo-row {
    color: #94a3b8;
    margin-bottom: .18rem
}

.pinfo-row span {
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: .65rem
}

.paint-palette {
    display: flex;
    align-items: center;
    gap: .45rem;
    flex-wrap: wrap
}

.palette-label {
    font-size: .65rem;
    color: var(--muted);
    font-weight: 700
}

.palette-swatches {
    display: flex;
    gap: .3rem;
    flex-wrap: wrap
}

.swatch {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: .2s
}

.swatch:hover {
    transform: scale(1.2)
}

.swatch.selected {
    border-color: #fff;
    box-shadow: 0 0 6px rgba(255, 255, 255, .4)
}

/* Step list */
.step-list-small {
    display: flex;
    flex-direction: column;
    gap: .35rem
}

.step-s {
    display: flex;
    align-items: flex-start;
    gap: .4rem;
    font-size: .73rem;
    color: #94a3b8
}

.num-s {
    background: rgba(245, 158, 11, .15);
    color: var(--amber);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    min-width: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .6rem;
    font-weight: 800
}

/* Modal */
.info-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, .85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: mfade .2s ease
}

.info-modal-overlay.hidden {
    display: none
}

@keyframes mfade {
    from {
        opacity: 0
    }

    to {
        opacity: 1
    }
}

.info-modal-box {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(245, 158, 11, .2);
    border-radius: 20px;
    padding: 1.5rem;
    width: 100%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .7);
    animation: mslide .3s cubic-bezier(.175, .885, .32, 1.275)
}

@keyframes mslide {
    from {
        transform: translateY(25px);
        opacity: 0
    }

    to {
        transform: translateY(0);
        opacity: 1
    }
}

.info-modal-close {
    position: absolute;
    top: .9rem;
    right: .9rem;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--border);
    color: var(--muted);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: .2s;
    font-size: .78rem
}

.info-modal-close:hover {
    background: var(--red);
    color: #fff;
    border-color: var(--red)
}

.info-modal-header {
    display: flex;
    align-items: center;
    gap: .9rem;
    margin-bottom: .9rem
}

.info-modal-icon {
    font-size: 2rem
}

.info-modal-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text)
}

.info-modal-subtitle {
    font-size: .7rem;
    color: var(--muted);
    margin-top: .08rem
}

.why-tabs {
    display: flex;
    gap: .3rem;
    flex-wrap: wrap;
    margin-bottom: .8rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: .45rem
}

.why-tab {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    padding: .22rem .65rem;
    border-radius: 7px;
    font-size: .73rem;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    font-family: inherit
}

.why-tab:hover {
    color: var(--amber);
    border-color: var(--amber)
}

.why-tab.active {
    background: var(--amber);
    border-color: var(--amber);
    color: #020617
}

.why-section {
    display: none
}

.why-section.active {
    display: block
}

.why-section p {
    font-size: .8rem;
    color: #94a3b8;
    margin-bottom: .4rem
}

.step-list {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    margin: .4rem 0
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    font-size: .77rem;
    color: #94a3b8;
    line-height: 1.5
}

.step-num {
    background: rgba(245, 158, 11, .15);
    color: var(--amber);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    min-width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .68rem;
    font-weight: 800
}

/* Demo */
.demo-overlay {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    width: 100%;
    max-width: 460px;
    padding: 0 16px
}

.demo-card {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border: 2px solid rgba(245, 158, 11, .4);
    border-radius: 18px;
    padding: 1rem 1.3rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, .6);
    animation: demo-up .35s cubic-bezier(.175, .885, .32, 1.275)
}

@keyframes demo-up {
    from {
        transform: translateY(25px);
        opacity: 0
    }

    to {
        transform: translateY(0);
        opacity: 1
    }
}

.demo-step-ind {
    font-size: .6rem;
    font-weight: 800;
    color: var(--amber);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: .2rem
}

.demo-title {
    font-size: .95rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: .3rem
}

.demo-body {
    font-size: .8rem;
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: .8rem
}

.demo-body strong {
    color: var(--text)
}

.demo-actions {
    display: flex;
    gap: .6rem
}

.ctrl-btn {
    display: flex;
    align-items: center;
    gap: .35rem;
    padding: .32rem .8rem;
    border-radius: 8px;
    font-size: .78rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: all .2s
}

.ctrl-btn.step {
    background: var(--blue);
    color: #fff
}

.ctrl-btn.step:hover {
    background: #2563eb;
    transform: translateY(-1px)
}

.ctrl-btn.reset {
    background: rgba(248, 113, 113, .1);
    color: var(--red);
    border: 1px solid rgba(248, 113, 113, .3)
}

.ctrl-btn.reset:hover {
    background: rgba(248, 113, 113, .2)
}