/* ================================================================
   KRİPTOGRAFİ SUNUM — CYBERPUNK DARK TEMA
   Neon mavi (#00d4ff) + Neon mor (#b24dff) + Derin siyah (#0a0a1a)
   ================================================================ */

/* === DEĞİŞKENLER === */
:root {
    --bg-deep:   #06060f;
    --bg-dark:   #0a0a1a;
    --bg-card:   rgba(15, 15, 35, .55);
    --bg-card-h: rgba(20, 20, 50, .7);
    --neon-blue: #00d4ff;
    --neon-purple: #b24dff;
    --neon-pink: #ff4da6;
    --neon-green: #00ffaa;
    --text:      #e0e0f0;
    --text-dim:  #8888aa;
    --text-bright:#ffffff;
    --glass-border: rgba(255,255,255,.08);
    --glass-blur: 22px;
    --radius:    14px;
    --radius-sm: 8px;
    --transition: .35s cubic-bezier(.4,0,.2,1);
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* === ARKA PLAN EFEKTLERİ === */
.bg-grid {
    position: fixed; inset: 0; z-index: 0;
    background-image:
        linear-gradient(rgba(0,212,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,.04) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

#bg-particles {
    position: fixed; inset: 0; z-index: 0;
    pointer-events: none;
}

/* === GLASSMORPHISM KART === */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    transition: background var(--transition), border-color var(--transition);
}
.glass-card:hover {
    background: var(--bg-card-h);
    border-color: rgba(0,212,255,.15);
}

/* === SLAYT SİSTEMİ === */
#presentation {
    position: relative;
    width: 100vw;
    height: 100vh;
    z-index: 1;
}

.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(30px) scale(.97);
    transition: opacity .55s ease, transform .55s ease, visibility 0s .55s;
    padding: 40px 60px 80px;
    overflow-y: auto;
}
.slide.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    transition: opacity .55s ease, transform .55s ease, visibility 0s 0s;
}

.slide-inner {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

/* === NAVİGASYON === */
.slide-nav {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 10px 24px;
    background: rgba(10,10,30,.75);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    backdrop-filter: blur(16px);
}

.nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 50%;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition);
}
.nav-btn:hover {
    background: rgba(0,212,255,.15);
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    box-shadow: 0 0 20px rgba(0,212,255,.25);
}
.nav-btn:active { transform: scale(.9); }

.slide-counter {
    font-family: var(--font-mono);
    font-size: .9rem;
    color: var(--text-dim);
    min-width: 60px;
    text-align: center;
    user-select: none;
}
.slide-counter .sep { margin: 0 2px; opacity: .4; }

/* === İLERLEME ÇUBUĞU === */
.progress-container {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: rgba(255,255,255,.05);
    z-index: 101;
}
.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    border-radius: 0 2px 2px 0;
    transition: width .4s ease;
    box-shadow: 0 0 12px var(--neon-blue);
}

/* === GİRİŞ SLAYTI === */
.intro-slide {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}

.intro-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    font-size: .85rem;
    font-weight: 500;
    color: var(--neon-blue);
    border-color: rgba(0,212,255,.2);
}
.intro-badge i, .intro-badge svg { width: 16px; height: 16px; }

.intro-title {
    display: flex;
    flex-direction: column;
}
.title-line {
    font-weight: 900;
    font-size: clamp(2.6rem, 6vw, 4.8rem);
    line-height: 1.1;
    letter-spacing: -1px;
    color: var(--text-bright);
}
.title-line.accent {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-subtitle {
    font-size: 1.15rem;
    color: var(--text-dim);
    max-width: 550px;
    line-height: 1.7;
}

.intro-chips {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}
.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 50px;
    font-size: .8rem;
    color: var(--text-dim);
    background: rgba(255,255,255,.03);
}
.chip i, .chip svg { width: 14px; height: 14px; color: var(--neon-purple); }

.intro-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: .85rem;
    animation: pulse-hint 2s ease infinite;
}

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 2px 8px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--neon-blue);
}

@keyframes pulse-hint {
    0%, 100% { opacity: .5; }
    50% { opacity: 1; }
}

/* === BİLGİ SLAYTI === */
.info-slide {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.info-header {
    display: flex;
    align-items: center;
    gap: 20px;
}

.info-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-color: rgba(0,212,255,.2);
    flex-shrink: 0;
}
.info-icon-wrap i, .info-icon-wrap svg {
    width: 30px;
    height: 30px;
    color: var(--neon-blue);
}

.info-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--text-bright);
    letter-spacing: -.5px;
}

.info-era {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .85rem;
    color: var(--neon-purple);
    margin-top: 2px;
}
.info-era i, .info-era svg { width: 14px; height: 14px; }

.info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.info-card {
    padding: 28px;
}
.info-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-blue);
    margin-bottom: 14px;
}
.info-card h3 i, .info-card h3 svg { width: 18px; height: 18px; }
.info-card p {
    font-size: .95rem;
    line-height: 1.75;
    color: var(--text);
}

.info-next-hint {
    text-align: center;
    color: var(--text-dim);
    font-size: .85rem;
    animation: pulse-hint 2s ease infinite;
}

/* === SİMÜLASYON GENEL === */
.sim-slide {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sim-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sim-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-bright);
}

.sim-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 50px;
    font-size: .75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--neon-green);
    border: 1px solid rgba(0,255,170,.25);
    background: rgba(0,255,170,.06);
}
.sim-badge.pulse { animation: badge-pulse 2s ease infinite; }
.sim-badge i, .sim-badge svg { width: 12px; height: 12px; }
@keyframes badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0,255,170,.3); }
    50%      { box-shadow: 0 0 14px 2px rgba(0,255,170,.15); }
}

.sim-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sim-controls {
    display: flex;
    gap: 16px;
    padding: 20px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 180px;
}
.input-group label {
    font-size: .8rem;
    font-weight: 500;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 6px;
}
.input-group label i, .input-group label svg { width: 14px; height: 14px; }

.sim-output {
    padding: 18px 22px;
}
.sim-output label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 10px;
}
.sim-output label i, .sim-output label svg { width: 14px; height: 14px; }

.output-text {
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--text-bright);
    min-height: 1.6em;
    word-break: break-all;
}
.output-text.accent { color: var(--neon-blue); }
.mono { font-family: var(--font-mono); }

/* === NEON INPUT === */
.neon-input {
    width: 100%;
    padding: 10px 16px;
    background: rgba(0,0,0,.35);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-sm);
    color: var(--text-bright);
    font-family: var(--font-mono);
    font-size: .95rem;
    outline: none;
    transition: all var(--transition);
}
.neon-input::placeholder { color: rgba(255,255,255,.2); }
.neon-input:focus {
    border-color: var(--neon-blue);
    box-shadow: 0 0 20px rgba(0,212,255,.15), inset 0 0 20px rgba(0,212,255,.03);
}

/* === NEON RANGE SLİDER === */
.neon-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255,255,255,.06);
    border-radius: 3px;
    outline: none;
    transition: background var(--transition);
}
.neon-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--neon-blue);
    cursor: pointer;
    box-shadow: 0 0 14px rgba(0,212,255,.5);
    transition: transform .2s;
}
.neon-range::-webkit-slider-thumb:hover { transform: scale(1.2); }
.neon-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--neon-blue);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 14px rgba(0,212,255,.5);
}

/* === NEON BUTON === */
.neon-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border: 1px solid rgba(0,212,255,.3);
    border-radius: var(--radius-sm);
    background: rgba(0,212,255,.08);
    color: var(--neon-blue);
    font-family: var(--font-body);
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.neon-btn i, .neon-btn svg { width: 16px; height: 16px; }
.neon-btn:hover {
    background: rgba(0,212,255,.18);
    box-shadow: 0 0 24px rgba(0,212,255,.2);
}
.neon-btn:active { transform: scale(.95); }
.neon-btn.secondary {
    border-color: rgba(178,77,255,.3);
    background: rgba(178,77,255,.08);
    color: var(--neon-purple);
}
.neon-btn.secondary:hover {
    background: rgba(178,77,255,.18);
    box-shadow: 0 0 24px rgba(178,77,255,.2);
}

/* ================================================================
   SEZAR ŞİFRELEMESİ
   ================================================================ */
.caesar-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px 0;
    overflow-x: auto;
}

.alphabet-row {
    display: flex;
    gap: 2px;
}

.alphabet-row .letter {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: .85rem;
    font-weight: 600;
    border-radius: 6px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.06);
    color: var(--text);
    transition: all .3s ease;
    flex-shrink: 0;
}
.alphabet-row .letter.highlight {
    background: rgba(0,212,255,.2);
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    box-shadow: 0 0 12px rgba(0,212,255,.25);
}
.alphabet-row.shifted .letter {
    color: var(--neon-purple);
}
.alphabet-row.shifted .letter.highlight {
    background: rgba(178,77,255,.2);
    border-color: var(--neon-purple);
    color: var(--neon-purple);
    box-shadow: 0 0 12px rgba(178,77,255,.25);
}

.alphabet-arrow-row {
    display: flex;
    gap: 2px;
}
.alphabet-arrow-row .arrow {
    width: 36px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .65rem;
    color: var(--text-dim);
    opacity: .3;
    transition: opacity .3s;
}
.alphabet-arrow-row .arrow.active {
    opacity: 1;
    color: var(--neon-blue);
}

/* ================================================================
   PIGPEN ŞİFRELEMESİ
   ================================================================ */
.pigpen-output-area {
    padding: 20px;
}
.pigpen-output-area label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 14px;
}
.pigpen-output-area label i { width: 14px; height: 14px; }

.pigpen-symbols {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    min-height: 60px;
    align-items: center;
}

.pigpen-symbols svg {
    width: 44px;
    height: 44px;
    animation: pigpen-pop .3s ease;
}
@keyframes pigpen-pop {
    0%   { opacity: 0; transform: scale(.5); }
    100% { opacity: 1; transform: scale(1); }
}

.pigpen-reference {
    padding: 20px;
}
.pigpen-reference label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 14px;
}
.pigpen-reference label i { width: 14px; height: 14px; }

.pigpen-ref-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.pigpen-ref-grid .ref-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 44px;
}
.pigpen-ref-grid .ref-item span {
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--text-dim);
}
.pigpen-ref-grid svg {
    width: 36px;
    height: 36px;
}

/* ================================================================
   SCYTALE
   ================================================================ */
.scytale-visual {
    display: flex;
    justify-content: center;
    padding: 10px 0;
}
#scytale-canvas {
    border-radius: var(--radius);
    max-width: 100%;
    height: auto;
}

/* ================================================================
   ENIGMA
   ================================================================ */
#enigma-sim {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.enigma-rotors {
    padding: 18px;
}
.enigma-rotors label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 12px;
}
.enigma-rotors label i { width: 14px; height: 14px; }

.rotor-display {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.rotor {
    width: 64px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, rgba(0,212,255,.12), rgba(178,77,255,.12));
    border: 2px solid rgba(0,212,255,.3);
    border-radius: 10px;
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--neon-blue);
    position: relative;
    transition: all .2s;
    overflow: hidden;
}
.rotor::before, .rotor::after {
    content: '';
    position: absolute;
    left: 6px; right: 6px;
    height: 1px;
    background: rgba(0,212,255,.2);
}
.rotor::before { top: 14px; }
.rotor::after  { bottom: 14px; }
.rotor.spin {
    animation: rotor-spin .25s ease;
}
@keyframes rotor-spin {
    0%   { transform: translateY(0); }
    50%  { transform: translateY(-8px); opacity: .5; }
    100% { transform: translateY(0); }
}

.enigma-lampboard { padding: 18px; }
.enigma-lampboard label {
    display: flex; align-items: center; gap: 6px;
    font-size: .8rem; color: var(--text-dim); margin-bottom: 12px;
}
.enigma-lampboard label i { width: 14px; height: 14px; }

.lamp-grid, .key-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
}

.lamp {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-family: var(--font-mono);
    font-size: .8rem;
    font-weight: 600;
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.06);
    color: var(--text-dim);
    transition: all .15s;
}
.lamp.lit {
    background: rgba(255,230,0,.25);
    border-color: rgba(255,230,0,.6);
    color: #ffe600;
    box-shadow: 0 0 18px rgba(255,230,0,.35);
}

.enigma-keyboard { padding: 18px; }
.enigma-keyboard label {
    display: flex; align-items: center; gap: 6px;
    font-size: .8rem; color: var(--text-dim); margin-bottom: 12px;
}
.enigma-keyboard label i { width: 14px; height: 14px; }

.key-grid .key {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: .85rem;
    font-weight: 600;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.1);
    color: var(--text);
    cursor: pointer;
    transition: all .15s;
    user-select: none;
}
.key-grid .key:hover {
    background: rgba(0,212,255,.15);
    border-color: var(--neon-blue);
}
.key-grid .key:active, .key-grid .key.pressed {
    transform: scale(.88);
    background: rgba(0,212,255,.3);
    box-shadow: 0 0 12px rgba(0,212,255,.3);
}

.enigma-io {
    padding: 18px;
}
.enigma-io-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 14px;
}
.enigma-io-row label {
    font-size: .75rem;
    color: var(--text-dim);
    margin-bottom: 6px;
    display: block;
}
.enigma-io-row .output-text {
    font-size: 1rem;
    letter-spacing: 3px;
    min-height: 1.4em;
}

/* ================================================================
   BIFID
   ================================================================ */
.bifid-layout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
}

.bifid-table-wrap {
    padding: 18px;
}
.bifid-table-wrap label {
    display: flex; align-items: center; gap: 6px;
    font-size: .8rem; color: var(--text-dim); margin-bottom: 12px;
}
.bifid-table-wrap label i { width: 14px; height: 14px; }

.polybius-table {
    border-collapse: collapse;
}
.polybius-table td {
    width: 38px;
    height: 38px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: .85rem;
    font-weight: 500;
    color: var(--text);
    border: 1px solid rgba(255,255,255,.06);
    transition: all .25s;
}
.polybius-table td.header {
    font-size: .7rem;
    color: var(--text-dim);
    background: rgba(255,255,255,.02);
    font-weight: 600;
}
.polybius-table td.highlight-row {
    background: rgba(0,212,255,.12);
    color: var(--neon-blue);
}
.polybius-table td.highlight-col {
    background: rgba(178,77,255,.12);
    color: var(--neon-purple);
}
.polybius-table td.highlight-cell {
    background: rgba(0,212,255,.25);
    border-color: var(--neon-blue);
    color: var(--text-bright);
    box-shadow: inset 0 0 12px rgba(0,212,255,.15);
}

.bifid-steps {
    padding: 18px;
    overflow-x: auto;
}
.bifid-steps label {
    display: flex; align-items: center; gap: 6px;
    font-size: .8rem; color: var(--text-dim); margin-bottom: 12px;
}
.bifid-steps label i { width: 14px; height: 14px; }

.bifid-flow {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: .82rem;
}
.bifid-flow .flow-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.bifid-flow .flow-label {
    width: 90px;
    flex-shrink: 0;
    color: var(--text-dim);
    font-size: .72rem;
    text-align: right;
}
.bifid-flow .flow-cell {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 6px;
    border-radius: 5px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.06);
    color: var(--text);
    transition: all .3s;
}
.bifid-flow .flow-cell.blue  { color: var(--neon-blue);   border-color: rgba(0,212,255,.25); background: rgba(0,212,255,.08); }
.bifid-flow .flow-cell.purple { color: var(--neon-purple); border-color: rgba(178,77,255,.25); background: rgba(178,77,255,.08); }
.bifid-flow .flow-cell.green  { color: var(--neon-green);  border-color: rgba(0,255,170,.25); background: rgba(0,255,170,.08); }
.bifid-flow .flow-arrow {
    color: var(--text-dim);
    font-size: .7rem;
}

/* ================================================================
   STEGANOGRAFİ
   ================================================================ */
.steg-canvases {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.steg-canvas-wrap {
    padding: 18px;
    text-align: center;
}
.steg-canvas-wrap label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--text-dim);
    margin-bottom: 12px;
}
.steg-canvas-wrap label i { width: 14px; height: 14px; }
.steg-canvas-wrap canvas {
    border-radius: var(--radius-sm);
    max-width: 100%;
    height: auto;
    border: 1px solid rgba(255,255,255,.06);
}

.steg-analysis {
    padding: 20px;
}
.steg-analysis label {
    display: flex; align-items: center; gap: 6px;
    font-size: .8rem; color: var(--text-dim); margin-bottom: 14px;
}
.steg-analysis label i { width: 14px; height: 14px; }

.steg-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.stat-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.stat-label {
    font-size: .7rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .5px;
}
.stat-value {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-blue);
}

.steg-bar-wrap {
    height: 6px;
    background: rgba(255,255,255,.04);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 14px;
}
.steg-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-blue));
    border-radius: 3px;
    transition: width 1.2s ease;
}

/* ================================================================
   BASE64
   ================================================================ */
.base64-flow {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.b64-step {
    padding: 12px 0;
}
.b64-step label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .78rem;
    color: var(--text-dim);
    margin-bottom: 8px;
}
.b64-step label i { width: 14px; height: 14px; }

.b64-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 32px;
    align-items: center;
}
.b64-row .b64-cell {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border-radius: 6px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.06);
    font-size: .82rem;
    color: var(--text);
    animation: b64-pop .3s ease;
    transition: all .3s;
}
.b64-row .b64-cell.blue   { color: var(--neon-blue); border-color: rgba(0,212,255,.2); }
.b64-row .b64-cell.purple { color: var(--neon-purple); border-color: rgba(178,77,255,.2); }
.b64-row .b64-cell.green  { color: var(--neon-green); border-color: rgba(0,255,170,.2); background: rgba(0,255,170,.06); }

@keyframes b64-pop {
    0%   { opacity: 0; transform: scale(.7) translateY(8px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

.b64-arrow {
    display: flex;
    justify-content: center;
    color: var(--text-dim);
    opacity: .4;
}
.b64-arrow i, .b64-arrow svg { width: 18px; height: 18px; }

/* ================================================================
   KAPANIŞ SLAYTI
   ================================================================ */
.outro-slide {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}
.outro-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,212,255,.15), rgba(178,77,255,.15));
    border: 1px solid rgba(0,212,255,.2);
}
.outro-icon i, .outro-icon svg { width: 38px; height: 38px; color: var(--neon-blue); }

.outro-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.outro-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-dim);
    max-width: 600px;
}
.outro-text strong { color: var(--neon-blue); font-weight: 600; }

.outro-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 800px;
    width: 100%;
}
.outro-card {
    padding: 24px 18px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.outro-card i, .outro-card svg { width: 28px; height: 28px; color: var(--neon-purple); }
.outro-card h4 { font-size: .9rem; font-weight: 600; color: var(--text-bright); }
.outro-card p  { font-size: .8rem; line-height: 1.6; color: var(--text-dim); }

.outro-footer {
    font-size: .9rem;
    color: var(--text-dim);
    font-style: italic;
    margin-top: 8px;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 900px) {
    .slide { padding: 24px 24px 80px; }
    .info-cards { grid-template-columns: 1fr; }
    .bifid-layout { grid-template-columns: 1fr; }
    .steg-canvases { grid-template-columns: 1fr; }
    .outro-cards { grid-template-columns: 1fr; }
    .enigma-io-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .slide { padding: 16px 12px 80px; }
    .sim-controls { flex-direction: column; }
    .alphabet-row .letter { width: 28px; height: 28px; font-size: .7rem; }
    .alphabet-arrow-row .arrow { width: 28px; }
    .rotor { width: 50px; height: 64px; font-size: 1.4rem; }
    .lamp, .key-grid .key { width: 30px; height: 30px; font-size: .7rem; }
}

/* ================================================================
   DOKUNMATİK / AKILLI TAHTA OPTİMİZASYONLARI
   Büyütülmüş dokunma hedefleri, dokunma geri bildirimi
   ================================================================ */

/* Tüm tıklanabilir öğeler için minimum 48px dokunma alanı */
@media (pointer: coarse), (hover: none) {
    .nav-btn {
        width: 56px;
        height: 56px;
    }
    .neon-btn {
        padding: 14px 28px;
        font-size: .95rem;
        min-height: 48px;
    }
    .neon-input {
        padding: 14px 18px;
        font-size: 1.1rem;
        min-height: 50px;
    }
    .neon-range {
        height: 10px;
    }
    .neon-range::-webkit-slider-thumb {
        width: 30px;
        height: 30px;
    }
    .neon-range::-moz-range-thumb {
        width: 30px;
        height: 30px;
    }
    .key-grid .key {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
    .lamp {
        width: 44px;
        height: 44px;
        font-size: .9rem;
    }
    .chip {
        padding: 8px 18px;
        font-size: .85rem;
    }
    .slide-counter {
        font-size: 1rem;
    }
}

/* Dokunma geri bildirimi: aktif durumda parlama */
@media (pointer: coarse) {
    .nav-btn:active,
    .neon-btn:active,
    .key-grid .key:active {
        transform: scale(.92);
        transition-duration: .05s;
    }
}

/* Slide'lar: OSK açıkken içeriği yukarı kaydır */
body.osk-open .slide {
    padding-bottom: 320px;
}
body.osk-open .slide-nav {
    bottom: 290px;
}
body.osk-open .progress-container {
    bottom: 280px;
}

/* ================================================================
   EKRAN KLAVYESİ (OSK) STİLLERİ
   Akıllı tahta dokunmatik klavye bileşeni
   ================================================================ */
.osk-wrap {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(8, 8, 22, .92);
    border-top: 1px solid rgba(0,212,255,.15);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    transform: translateY(100%);
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
    padding-bottom: env(safe-area-inset-bottom, 0);
}
.osk-wrap.osk-visible {
    transform: translateY(0);
}

.osk-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 20px;
    border-bottom: 1px solid rgba(255,255,255,.05);
}

.osk-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--text-dim);
    user-select: none;
}
.osk-title svg { color: var(--neon-blue); }

.osk-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 8px;
    background: transparent;
    color: var(--text-dim);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all .2s;
    -webkit-tap-highlight-color: transparent;
}
.osk-close:active {
    background: rgba(255,77,77,.15);
    border-color: rgba(255,77,77,.3);
    color: #ff4d4d;
}

.osk-keys {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 10px 12px 14px;
}

.osk-row {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.osk-key {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 52px;
    height: 52px;
    padding: 0 10px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.1);
    background: rgba(255,255,255,.05);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: all .12s ease;
    touch-action: manipulation;
}
.osk-key:active, .osk-key.osk-pressed {
    background: rgba(0,212,255,.2);
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    transform: scale(.92);
    box-shadow: 0 0 16px rgba(0,212,255,.2);
}

/* Boşluk tuşu */
.osk-key.osk-space {
    min-width: 280px;
    font-size: .85rem;
    color: var(--text-dim);
    letter-spacing: 2px;
}

/* Silme tuşu */
.osk-key.osk-back {
    min-width: 72px;
    font-size: 1.3rem;
    color: var(--neon-pink);
    border-color: rgba(255,77,166,.15);
    background: rgba(255,77,166,.06);
}
.osk-key.osk-back:active, .osk-key.osk-back.osk-pressed {
    background: rgba(255,77,166,.2);
    border-color: var(--neon-pink);
    box-shadow: 0 0 16px rgba(255,77,166,.2);
}

/* ================================================================
   DOKUNMATİK SWİPE İPUCU (ilk slayt)
   ================================================================ */
.intro-hint kbd {
    min-width: 36px;
    height: 36px;
    font-size: .95rem;
}

/* Swipe ipucu (dokunmatik cihazlar) */
@media (pointer: coarse) {
    .intro-hint::after {
        content: '  veya kaydırın';
        color: var(--text-dim);
    }
    .info-next-hint::after {
        content: '  veya sola kaydırın';
        color: var(--text-dim);
    }
}