:root {
  color-scheme: dark;
  --cb-bg: #050807;
  --cb-alt: #0a0f0e;
  --cb-card: #0b1210;
  --cb-accent: #00e5a8;
  --cb-accent-rgb: 0,229,168;
  --cb-accent-hover: #43f3c1;
  --cb-accent-soft: #6fe8c3;
  --cb-link-hover: #a8f2dc;
  --cb-ink: #e8eeec;
  --cb-muted: #9dafa8;
  --cb-soft: #84948d;
  --cb-alert: #e8b4b4;
  --cb-border: rgba(255,255,255,.12);
  --cb-sans: 'Space Grotesk', sans-serif;
  --cb-mono: 'JetBrains Mono', monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body.cb-site { margin: 0; background: var(--cb-bg); color: var(--cb-ink); font-family: var(--cb-sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; min-width: 280px; }
::selection { background: rgba(var(--cb-accent-rgb),.3); color: #fff; }
a { color: var(--cb-accent-soft); text-decoration: none; text-underline-offset: .25em; }
a:hover { color: var(--cb-link-hover); }
button, input, textarea, select { font: inherit; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button, input, textarea, select, .btn { border-radius: 0 !important; }
:focus-visible { outline: 2px solid var(--cb-accent); outline-offset: 4px; }
button:disabled, .btn:disabled { opacity: .5; cursor: wait; }
[hidden] { display: none !important; }
img, canvas, video { max-width: 100%; }
h1, h2, h3, h4 { color: var(--cb-ink); font-weight: 600; line-height: 1.15; letter-spacing: -.025em; }
h1 { font-size: clamp(32px, 4.2vw, 56px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 24px; }
h4 { font-size: 20px; }
p { color: var(--cb-muted); }
strong { color: var(--cb-ink); }
hr { border-color: var(--cb-border); opacity: 1; }
.cb-atmosphere { position: fixed; inset: 0; z-index: 0; pointer-events: none; background-image: linear-gradient(rgba(232,238,236,.018) 1px, transparent 1px), linear-gradient(90deg,rgba(232,238,236,.018) 1px,transparent 1px); background-size: 64px 64px; }
.cb-atmosphere::after { content: ''; position: absolute; inset: 0; background: repeating-linear-gradient(0deg,rgba(255,255,255,.008) 0 1px,transparent 1px 3px); }
.cb-header, .cb-main, .cb-footer, .cb-preview-banner { position: relative; z-index: 1; }
.cb-skip-link { position: fixed; top: -100px; left: 16px; z-index: 20000; padding: 12px 20px; background: var(--cb-accent); color: var(--cb-bg); font-weight: 600; }
.cb-skip-link:focus { top: 12px; }
.cb-preview-banner { padding: 8px 24px; text-align: center; background: #13221c; border-bottom: 1px solid rgba(var(--cb-accent-rgb),.25); color: var(--cb-accent); font: 11px/1.7 var(--cb-mono); letter-spacing: .06em; }
.cb-preview-banner span { margin-left: 16px; color: #b9c9c1; letter-spacing: 0; }
.cb-header { position: sticky; top: 0; z-index: 100; background: rgba(10,15,14,.93); border-bottom: 1px solid rgba(255,255,255,.07); backdrop-filter: blur(14px); }
.cb-header-inner { max-width: 1244px; min-height: 76px; padding: 0 32px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.cb-brand { flex: 0 0 auto; display: inline-flex; align-items: center; }
.cb-brand img { width: 158px; height: auto; max-height: 46px; object-fit: contain; filter: drop-shadow(0 0 9px rgba(var(--cb-accent-rgb),.25)); }
.cb-navigation { display: flex; align-items: center; justify-content: space-between; flex: 1; gap: 24px; }
.cb-nav-links { display: flex; align-items: center; justify-content: center; gap: 21px; margin: 0 auto; }
.cb-nav-links a { color: var(--cb-muted); white-space: nowrap; font-size: 13px; }
.cb-nav-links a:hover { color: var(--cb-ink); }
.cb-nav-actions { display: flex; gap: 10px; flex-shrink: 0; }
.cb-button, .btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 46px; padding: 11px 21px; border: 1px solid var(--cb-border); color: var(--cb-ink); background: transparent; font-family: var(--cb-sans); font-weight: 600; font-size: 14px; line-height: 1.4; text-align: center; transition: border-color .18s ease, background-color .18s ease, color .18s ease, box-shadow .18s ease; cursor: pointer; text-decoration: none; }
.cb-button:hover, .btn:hover { background: rgba(255,255,255,.045); color: #fff; border-color: rgba(255,255,255,.3); }
.cb-button-primary, .btn-primary, .btn-success, .btn-info { background: var(--cb-accent); border-color: var(--cb-accent); color: var(--cb-bg) !important; box-shadow: 0 0 24px rgba(var(--cb-accent-rgb),.13); }
.cb-button-primary:hover, .btn-primary:hover, .btn-success:hover, .btn-info:hover, .btn-primary:focus, .btn-success:focus, .btn-info:focus { background: var(--cb-accent-hover); border-color: var(--cb-accent-hover); color: #050807 !important; box-shadow: 0 0 28px rgba(var(--cb-accent-rgb),.22); }
.btn-outline-primary { border-color: rgba(var(--cb-accent-rgb),.5); color: var(--cb-accent); }
.btn-outline-primary:hover { background: rgba(var(--cb-accent-rgb),.08); border-color: var(--cb-accent); color: var(--cb-accent); }
.btn-secondary, .btn-outline-secondary, .cb-button-quiet { background: transparent; color: var(--cb-muted); border-color: rgba(255,255,255,.18); box-shadow: none; }
.btn-danger, .btn-outline-danger { color: var(--cb-alert); border-color: rgba(232,180,180,.35); background: rgba(232,180,180,.035); }
.btn-danger:hover, .btn-outline-danger:hover { background: rgba(232,180,180,.12); border-color: var(--cb-alert); color: #ffd4d4; }
.btn-warning { background: #dbcf9a; color: #10130b; border-color: #dbcf9a; box-shadow: none; }
.btn-sm { min-height: 38px; padding: 8px 12px; font-size: 12px; }
.btn-lg { padding: 16px 24px; font-size: 16px; }
.cb-nav-actions .cb-button { min-height: 40px; padding: 9px 13px; font-size: 13px; }
.cb-menu-toggle { display: none; align-items: center; gap: 12px; padding: 10px 12px; min-height: 44px; color: var(--cb-ink); background: none; border: 1px solid var(--cb-border); font: 12px var(--cb-mono); }
.cb-menu-icon { position: relative; width: 17px; height: 12px; border-top: 1px solid currentColor; border-bottom: 1px solid currentColor; }
.cb-menu-icon::before { content: ''; position: absolute; width: 17px; top: 5px; left: 0; border-top: 1px solid currentColor; }
.cb-mobile-tools { display: none; }
.cb-main { min-height: 62vh; }
.cb-main:focus { outline: none; }
.cb-tool-navigation { max-width: 860px; padding: 24px 0 0; margin: 0 auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-bottom: 1px solid var(--cb-border); }
.cb-tool-navigation a { display: flex; align-items: center; justify-content: center; min-height: 54px; padding: 12px 8px; color: var(--cb-soft); font: 500 15px/1.5 var(--cb-sans); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.cb-tool-navigation a:hover { color: var(--cb-ink); }
.cb-tool-navigation a[aria-current="page"] { color: var(--cb-accent); border-color: var(--cb-accent); }
.cb-tool-navigation [data-tool="encrypt"] { --cb-accent: #00e5a8; }
.cb-tool-navigation [data-tool="decrypt"] { --cb-accent: #ed60ff; }
.cb-tool-navigation [data-tool="contacts"] { --cb-accent: #c4d3cc; }
.cb-format-navigation { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; padding: 4px; border: 1px solid var(--cb-border); background: var(--cb-bg); }
.cb-format-navigation a { display: flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 16px; color: var(--cb-muted); font: 13px/1.5 var(--cb-mono); border: 1px solid transparent; }
.cb-format-navigation a:hover { color: var(--cb-ink); background: rgba(255,255,255,.04); }
.cb-format-navigation a[aria-current="page"] { color: var(--cb-accent); border-color: rgba(var(--cb-accent-rgb),.5); background: rgba(var(--cb-accent-rgb),.08); }
.cb-tool-formats { width: min(320px, calc(100% - 40px)); margin: 20px auto 0; }
.cb-tool-page, .cb-app-page { width: min(860px, calc(100% - 64px)); margin: 0 auto; padding: 52px 0 80px; }
.cb-page-heading { margin-bottom: 32px; }
.cb-page-heading h1 { font-size: clamp(30px, 4vw, 44px); margin: 10px 0 14px; }
.cb-page-heading p { max-width: 650px; margin-bottom: 0; font-size: 16px; }
.cb-eyebrow, .cb-kicker { color: var(--cb-accent); font: 11px/1.7 var(--cb-mono); letter-spacing: .12em; text-transform: uppercase; }
.cb-workspace { padding: 28px; background: var(--cb-card); border: 1px solid rgba(var(--cb-accent-rgb),.2); box-shadow: 0 22px 60px rgba(0,0,0,.24), 0 0 32px rgba(var(--cb-accent-rgb),.035); }
.cb-field { margin-bottom: 22px; }
.cb-field label, .form-label { font: 12px/1.6 var(--cb-mono); color: #bccbc4; margin-bottom: 10px; }
.cb-field h2, .cb-workspace h2 { font-size: 16px; letter-spacing: 0; margin-bottom: 12px; }
.cb-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.cb-result { margin-top: 28px; padding-top: 26px; border-top: 1px solid rgba(var(--cb-accent-rgb),.2); }
.cb-result h2, .cb-result h3 { font-size: 19px; }
.cb-note { color: var(--cb-soft); font: 12px/1.8 var(--cb-mono); }
.form-control, .form-select { padding: 13px 15px; min-height: 48px; color: var(--cb-ink); background-color: var(--cb-bg); border: 1px solid var(--cb-border); font: 14px/1.6 var(--cb-mono); box-shadow: none; }
.form-control:focus, .form-select:focus { color: var(--cb-ink); background-color: var(--cb-bg); border-color: rgba(var(--cb-accent-rgb),.65); box-shadow: 0 0 0 2px rgba(var(--cb-accent-rgb),.08); }
.form-control::placeholder { color: #76877f; opacity: 1; }
.form-control[readonly] { color: var(--cb-accent-soft); background: rgba(var(--cb-accent-rgb),.025); }
.form-control:disabled, .form-select:disabled { background: #0d1411; color: var(--cb-soft); }
.form-control[type="file"] { padding: 9px 12px; font-size: 13px; }
.form-control::file-selector-button { margin: -9px 14px -9px -12px; padding: 13px 16px; background: #17251f; border-right: 1px solid var(--cb-border); color: var(--cb-ink); }
.form-control:hover:not(:disabled):not([readonly])::file-selector-button { background: #20372b; }
.form-select { padding-right: 42px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' viewBox='0 0 16 16'%3E%3Cpath stroke='%239dafa8' stroke-linecap='square' d='m4 6 4 4 4-4'/%3E%3C/svg%3E"); }
.form-select option { background: var(--cb-card); color: var(--cb-ink); }
textarea.form-control { resize: vertical; min-height: 150px; overflow-wrap: anywhere; }
textarea#plaintext { font: 18px/1.65 var(--cb-sans); min-height: 250px; }
.input-group { flex-wrap: nowrap; }
.input-group .form-control { min-width: 0; }
.input-group > .btn { flex-shrink: 0; }
.form-text { color: var(--cb-soft); font-size: 12px; line-height: 1.7; }
.form-check { min-height: 26px; padding-left: 2em; }
.form-check-input { background-color: #111c16; border-color: #455c4e; box-shadow: none !important; border-radius: 0 !important; }
.form-check-input:checked { background-color: var(--cb-accent); border-color: var(--cb-accent); }
.form-check-input:focus { border-color: var(--cb-accent); outline: 2px solid var(--cb-accent); outline-offset: 3px; }
.form-switch { padding-left: 3.3em; }
.form-switch .form-check-input { width: 2.5em; margin-left: -3.3em; border-radius: 0 !important; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%239dafa8' d='M3 3h10v10H3z'/%3E%3C/svg%3E"); }
.form-switch .form-check-input:checked { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23050807' d='M3 3h10v10H3z'/%3E%3C/svg%3E"); }
.form-check-label { color: var(--cb-ink); font-size: 14px; }
.btn-check:checked + .btn, .btn-check:active + .btn { color: var(--cb-bg); background: var(--cb-accent); border-color: var(--cb-accent); box-shadow: none; }
.btn-check:focus + .btn { outline: 2px solid var(--cb-accent); outline-offset: 3px; box-shadow: none; }
.card, .bg-dark { background-color: var(--cb-card) !important; color: var(--cb-ink); border-color: var(--cb-border); border-radius: 0; }
.card h3 { font-size: 22px; }
.alert { padding: 15px 18px; border: 1px solid var(--cb-border); border-radius: 0; color: var(--cb-muted); font-size: 13px; line-height: 1.7; }
.alert-info, .alert-success { color: #b4decf; border-color: rgba(var(--cb-accent-rgb),.25); background: #0d2018; }
.alert-warning { color: #dbcfaa; background: #201e14; border-color: rgba(219,207,170,.25); }
.alert-danger { color: var(--cb-alert); background: #241516; border-color: rgba(232,180,180,.3); }
.alert-dark { background: var(--cb-bg); color: var(--cb-ink); border-color: var(--cb-border); }
.text-muted { color: var(--cb-muted) !important; }
.text-success { color: var(--cb-accent) !important; }
.text-warning { color: #e0cf9f !important; }
.text-danger { color: var(--cb-alert) !important; }
.border-bottom { border-color: var(--cb-border) !important; }
#cb-alert { max-width: 860px; margin-left: auto; margin-right: auto; }
#contactsList > div { padding: 18px 0 !important; gap: 16px; }
#contactsList > div > span { min-width: 0; overflow-wrap: anywhere; }
#contactsList strong { font-size: 15px; }
#contactsList small { font: 10px/1.8 var(--cb-mono); }
#contactsList > p { padding: 24px 0; margin: 0; }
#qrContainer { padding: 18px; background: #fff; width: fit-content; max-width: 100%; margin-left: auto; margin-right: auto; }
#qrContainer canvas, #qrContainer img { display: block; max-width: 100%; height: auto; }
#qrPanel { border-color: rgba(var(--cb-accent-rgb),.35); }
#messageText, #decryptedText { overflow-wrap: anywhere; font: 17px/1.8 var(--cb-sans); }
#messageText:focus { outline: none; }
#imgDecryptedImg, #imgPreview { max-height: 540px; object-fit: contain; }
#messageImage { max-height: 70vh; object-fit: contain; }
.cb-footer { border-top: 1px solid var(--cb-border); background: rgba(10,15,14,.75); }
.cb-footer-inner { max-width: 1244px; padding: 40px 32px 28px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cb-footer-brand { display: flex; align-items: center; gap: 14px; }
.cb-footer-mark { border: 1px solid #586b60; width: 27px; height: 27px; display: grid; place-items: center; color: #90a599; font: 13px var(--cb-mono); }
.cb-footer-brand strong { display: block; color: #b5c5bc; font: 11px/1.8 var(--cb-mono); letter-spacing: .13em; }
.cb-footer-brand div > span { display: block; color: var(--cb-soft); font-size: 12px; }
.cb-footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.cb-footer-links a { color: var(--cb-soft); font: 11px/1.8 var(--cb-mono); }
.cb-footer-links a:hover { color: var(--cb-accent); }
.cb-footer-note { flex-basis: 100%; margin: 0; color: #718378; font: 10px/1.7 var(--cb-mono); }
@media (max-width: 1080px) {
  .cb-header-inner { min-height: 70px; gap: 20px; }
  .cb-menu-toggle { display: inline-flex; }
  .cb-navigation { display: none; position: absolute; top: 100%; left: 0; right: 0; max-height: calc(100dvh - 85px); overflow-y: auto; padding: 25px 32px 30px; background: #0a100d; border-bottom: 1px solid rgba(var(--cb-accent-rgb),.25); box-shadow: 0 20px 40px rgba(0,0,0,.35); }
  .cb-navigation.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 24px; }
  .cb-nav-links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; width: 100%; border-top: 1px solid var(--cb-border); padding-top: 18px; }
  .cb-nav-links a { display: flex; align-items: center; min-height: 44px; font-size: 14px; }
  .cb-nav-actions { display: none; }
  .cb-mobile-tools { display: grid; gap: 16px; }
  .cb-menu-tool strong { display: block; margin-bottom: 8px; font-size: 16px; color: var(--cb-accent); }
  .cb-menu-tool[data-tool="encrypt"] { --cb-accent: #00e5a8; --cb-accent-rgb: 0,229,168; }
  .cb-menu-tool[data-tool="decrypt"] { --cb-accent: #ed60ff; --cb-accent-rgb: 237,96,255; }
  .cb-menu-formats { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
  .cb-mobile-tools a { display: flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 12px; border: 1px solid var(--cb-border); color: var(--cb-ink); font-size: 15px; }
  .cb-menu-formats a:hover, .cb-menu-formats a[aria-current="page"] { color: var(--cb-accent); border-color: var(--cb-accent); background: rgba(var(--cb-accent-rgb),.06); }
  .cb-mobile-tools .cb-menu-contacts { justify-content: flex-start; font-weight: 600; }
  .cb-menu-contacts[aria-current="page"] { border-color: #c4d3cc; }
}
@media (max-width: 924px) {
  .cb-tool-navigation { width: calc(100% - 64px); }
}
@media (max-width: 600px) {
  html { scroll-padding-top: 84px; }
  .cb-header-inner { padding: 0 20px; min-height: 66px; }
  .cb-brand img { width: 138px; }
  .cb-navigation { padding-left: 20px; padding-right: 20px; }
  .cb-preview-banner { padding: 7px 16px; font-size: 10px; }
  .cb-preview-banner span { display: block; margin-left: 0; }
  .cb-tool-navigation { width: calc(100% - 40px); padding-top: 12px; }
  .cb-tool-page, .cb-app-page { width: calc(100% - 40px); padding-top: 34px; padding-bottom: 52px; }
  .cb-workspace { padding: 20px 16px; }
  .cb-page-heading { margin-bottom: 24px; }
  .cb-page-heading h1 { font-size: 32px; }
  .cb-page-heading p { font-size: 14px; }
  .form-control, .form-select { font-size: 16px; padding-left: 12px; padding-right: 12px; }
  .form-select { padding-right: 38px; }
  textarea#plaintext { font-size: 17px; min-height: 220px; }
  .cb-actions > .btn { flex: 1 1 auto; }
  #contactsList > div { align-items: flex-start !important; flex-direction: column; gap: 12px; }
  #contactsList small { display: block; margin-left: 0 !important; }
  #contactsList > div > div { width: 100%; }
  #contactsList > div > div > .btn { flex: 1; }
  #backupWarning { flex-wrap: wrap; }
  .cb-footer-inner { padding: 30px 20px 24px; gap: 24px; }
  .cb-footer-links { gap: 14px 20px; }
  .cb-footer-brand { flex-basis: 100%; }
  .cb-footer-note { font-size: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Distinct functional modes; encryption links keep their green identity. */
[data-mode="decrypt"] {
  --cb-accent: #ed60ff;
  --cb-accent-rgb: 237,96,255;
  --cb-accent-hover: #f48aff;
  --cb-accent-soft: #f2a3ff;
  --cb-link-hover: #f8caff;
}
.cb-header .cb-button-primary {
  --cb-accent: #00e5a8;
  --cb-accent-rgb: 0,229,168;
  --cb-accent-hover: #43f3c1;
}
[data-mode="decrypt"] .alert-info,
[data-mode="decrypt"] .alert-success { color: #f0c5f5; background: #241329; }
.cb-contact-dialog { width: min(520px, calc(100% - 32px)); max-height: calc(100dvh - 32px); padding: 26px; background: var(--cb-card); color: var(--cb-ink); border: 1px solid rgba(var(--cb-accent-rgb),.5); box-shadow: 0 0 50px rgba(var(--cb-accent-rgb),.12); overflow-y: auto; }
.cb-contact-dialog::backdrop { background: rgba(5,8,7,.88); backdrop-filter: blur(5px); }
.cb-contact-dialog-heading { display: flex; gap: 16px; align-items: start; justify-content: space-between; margin-bottom: 16px; }
.cb-contact-dialog-heading h2 { margin-bottom: 0; font-size: 26px; }
.cb-contact-dialog .cb-eyebrow { margin-bottom: 8px; }
.cb-contact-qr { padding: 12px; width: fit-content; max-width: 100%; margin: 20px auto; background: white; }
.cb-contact-qr img, .cb-contact-qr canvas { max-width: 100%; height: auto; }
.cb-contact-dialog video { max-height: 38dvh; object-fit: contain; }
@media(max-width: 400px) { .cb-contact-dialog { padding: 18px; } }
/* Bootstrap interaction states must keep the current mode's accent as well. */
.btn:is(.btn-primary, .btn-success, .btn-info):is(:active, :disabled, .disabled) { background: var(--cb-accent); border-color: var(--cb-accent); color: var(--cb-bg); }
.btn:is(.btn-primary, .btn-success, .btn-info):is(:active, :focus) { box-shadow: 0 0 0 3px rgba(var(--cb-accent-rgb),.2), 0 0 28px rgba(var(--cb-accent-rgb),.22); }
.btn.btn-outline-primary:active { background: rgba(var(--cb-accent-rgb),.12); border-color: var(--cb-accent); color: var(--cb-accent); }
.btn.btn-link { color: var(--cb-accent-soft); }

.cb-nav-actions .cb-nav-decrypt { color: #ed60ff; border-color: rgba(237,96,255,.55); }
.cb-nav-actions .cb-nav-decrypt:hover { color: #f48aff; background: rgba(237,96,255,.1); border-color: #ed60ff; }
.cb-nav-actions a[aria-current="page"] { outline: 1px solid currentColor; outline-offset: 3px; }