/* FEV.SU tools — shared Frost shell for url / qr / svg / bg */

:root {
    --ink: #10141a;
    --ink-soft: #3a4450;
    --paper: #e9eef2;
    --paper-2: #f6f8fa;
    --line: color-mix(in srgb, var(--ink) 12%, transparent);
    --frost: #0f7a86;
    --frost-deep: #0a5560;
    --signal: #d65a2e;
    --radius: 2px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --font-display: "Unbounded", "Golos Text", sans-serif;
    --font-body: "Golos Text", sans-serif;
    --pad: clamp(1.25rem, 4vw, 3rem);
    --max: 1100px;
    --link: var(--frost-deep);
    --link-hover: var(--signal);
    --muted: var(--ink-soft);
    --card: color-mix(in srgb, white 72%, transparent);
    --primary: var(--frost);
    --primary-dark: var(--frost-deep);
    --primary-color: var(--frost);
    --secondary-color: var(--frost-deep);
    --accent-color: var(--signal);
    --accent: var(--frost);
    --success-color: var(--frost);
    --warning-color: var(--signal);
    --light-color: var(--paper-2);
    --dark-color: var(--ink);
    --dark: var(--ink);
    --gray: var(--ink-soft);
    --light-gray: var(--line);
    --light: var(--paper-2);
    --secondary: var(--frost);
    --secondary-dark: var(--frost-deep);
    --border-radius: var(--radius);
    --box-shadow: none;
    --shadow: none;
    --shadow-hover: none;
    --transition:
        color 0.2s var(--ease), background 0.2s var(--ease),
        border-color 0.2s var(--ease);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    color-scheme: light;
}

body {
    margin: 0;
    min-height: 100dvh;
    font-family: var(--font-body);
    font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
    line-height: 1.55;
    color: var(--ink);
    background:
        radial-gradient(
            1200px 700px at 85% -10%,
            color-mix(in srgb, var(--frost) 18%, transparent),
            transparent 60%
        ),
        radial-gradient(
            900px 600px at -10% 20%,
            color-mix(in srgb, var(--signal) 10%, transparent),
            transparent 55%
        ),
        linear-gradient(165deg, #dfe7ee 0%, var(--paper) 38%, #eef2f5 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    opacity: 0.35;
    background-image:
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(
        ellipse 80% 60% at 50% 20%,
        #000 20%,
        transparent 75%
    );
}

a {
    color: var(--link);
    text-underline-offset: 0.2em;
    transition: color 0.2s var(--ease);
}

a:hover {
    color: var(--link-hover);
}

:focus-visible {
    outline: 2px solid var(--frost);
    outline-offset: 3px;
}

img {
    max-width: 100%;
    display: block;
}

/* ——— Chrome ——— */
.tool-top {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
    padding: 1rem var(--pad);
    border-block-end: 1px solid var(--line);
    background: color-mix(in srgb, white 55%, transparent);
    backdrop-filter: blur(10px);
}

.tool-top__brand {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: -0.03em;
    text-decoration: none;
    color: var(--ink);
}

.tool-top__brand:hover {
    color: var(--frost);
    text-decoration: none;
}

.tool-top__name {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--frost);
}

.tool-main {
    width: min(100% - var(--pad) * 2, var(--max));
    margin: 0 auto;
    padding: clamp(1.75rem, 4vw, 2.75rem) 0 clamp(2.5rem, 6vw, 4rem);
    flex: 1;
}

.tool-hero {
    display: grid;
    gap: 0.65rem;
    margin-block-end: clamp(1.5rem, 4vw, 2.25rem);
    max-width: 40rem;
}

.tool-hero__label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--frost);
}

.tool-hero h1 {
    margin: 0;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(1.75rem, 4vw, 2.6rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--ink);
    background: none;
    -webkit-text-fill-color: unset;
}

.tool-hero p,
.tool-hero__text {
    margin: 0;
    color: var(--ink-soft);
    font-size: clamp(1rem, 1.3vw, 1.1rem);
}

.tool-foot {
    margin-top: auto;
    padding: 1.25rem var(--pad);
    border-block-start: 1px solid var(--line);
    text-align: center;
    font-size: 0.88rem;
    color: var(--ink-soft);
}

.tool-foot a {
    font-weight: 600;
    text-decoration: none;
}

/* ——— Panels ——— */
.tool-panel,
.card,
.container > .card,
.input-section,
.output-section,
.feature,
.preview-box,
.format-selector,
.status {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    box-shadow: none;
}

.tool-panel,
.card {
    padding: clamp(1.1rem, 2.5vw, 1.5rem);
}

.input-section,
.output-section {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    padding: clamp(1.35rem, 3vw, 1.85rem);
}

.input-section > h2,
.output-section > h2 {
    margin: 0;
}

.input-group {
    display: grid;
    gap: 0.55rem;
    margin: 0;
}

.input-group > label {
    margin-bottom: 0;
}

.input-section > .btn-primary,
.input-section > button {
    align-self: start;
    margin-top: 0.35rem;
}

.card:hover,
.feature:hover {
    transform: none;
    box-shadow: none;
}

/* ——— Typography helpers ——— */
h2,
h3 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--ink);
}

h2 {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    margin: 0 0 1rem;
}

h3 {
    font-size: 1.02rem;
    margin: 0 0 0.4rem;
}

label {
    display: block;
    margin-bottom: 0.55rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.small-note,
.sm,
.subtitle,
.format-info,
.counter,
.empty-history {
    color: var(--ink-soft);
    font-size: 0.9rem;
}

/* ——— Forms ——— */
input[type="text"],
input[type="number"],
input[type="email"],
input[type="url"],
input[type="color"],
select,
textarea {
    width: 100%;
    min-height: 44px;
    padding: 0.95rem 1.05rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper-2);
    font: inherit;
    color: var(--ink);
    transition:
        border-color 0.2s var(--ease),
        box-shadow 0.2s var(--ease);
}

input[type="color"] {
    padding: 0.35rem;
    cursor: pointer;
}

textarea {
    min-height: 8.5rem;
    resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--frost);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--frost) 18%, transparent);
}

input[type="file"] {
    width: 100%;
    font-size: 0.92rem;
}

/* ——— Buttons ——— */
.btn,
button,
button.generate,
.btn-primary,
.btn-secondary,
.btn-copy,
.btn-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 44px;
    padding: 0.75rem 1.2rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition:
        background 0.25s var(--ease),
        color 0.25s var(--ease),
        border-color 0.25s var(--ease),
        transform 0.25s var(--ease);
}

.btn:hover,
button:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.btn--primary,
.btn-primary,
button.generate,
.btn-copy {
    background: var(--ink);
    color: var(--paper-2);
}

.btn--primary:hover,
.btn-primary:hover,
button.generate:hover,
.btn-copy:hover {
    background: var(--frost-deep);
    color: #fff;
}

.btn--ghost,
.btn-light,
.btn-secondary {
    background: color-mix(in srgb, white 55%, transparent);
    border-color: var(--line);
    color: var(--ink);
}

.btn--ghost:hover,
.btn-light:hover,
.btn-secondary:hover {
    border-color: var(--frost);
    color: var(--frost-deep);
    background: color-mix(in srgb, white 70%, transparent);
}

button:disabled,
.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

/* ——— Dropzone ——— */
.dropzone,
.upload-section {
    border: 1px dashed color-mix(in srgb, var(--frost) 45%, var(--line));
    background: color-mix(in srgb, white 50%, transparent);
    padding: clamp(1.5rem, 4vw, 2.25rem);
    text-align: center;
    color: var(--ink-soft);
    cursor: pointer;
    border-radius: var(--radius);
    transition:
        border-color 0.2s var(--ease),
        background 0.2s var(--ease);
}

.dropzone.dragover,
.upload-section.dragover,
.upload-section:hover {
    border-color: var(--frost);
    background: color-mix(in srgb, var(--frost) 8%, white);
    color: var(--ink);
}

.file-link {
    display: block;
    margin-block: 0.4rem;
    font-weight: 600;
    color: var(--frost-deep);
}

/* ——— Layout helpers ——— */
.wrap,
.container {
    width: min(100%, var(--max));
    margin-inline: auto;
}

.layout,
.main-content,
.preview-container,
.features {
    display: grid;
    gap: 1.25rem;
}

.layout {
    grid-template-columns: 1fr minmax(260px, 340px);
}

.main-content {
    grid-template-columns: 1fr;
    gap: clamp(1.35rem, 3vw, 1.85rem);
    align-items: start;
}

.preview-container {
    grid-template-columns: 1fr 1fr;
}

.features {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    margin-block-end: 1.5rem;
}

.feature {
    padding: 1.25rem;
    text-align: start;
}

.feature-icon,
.logo-icon,
.upload-icon {
    color: var(--frost);
    font-size: 1.35rem;
    margin-block-end: 0.65rem;
    background: none;
    -webkit-text-fill-color: unset;
}

.feature p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.92rem;
}

.row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.row .col {
    flex: 1;
    min-width: 140px;
}

.controls {
    display: grid;
    gap: 0.85rem;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 0.25rem 0 0.35rem;
}

.result {
    background: var(--paper-2);
    border: 1px dashed color-mix(in srgb, var(--frost) 40%, var(--line));
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    margin-top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
    flex-wrap: wrap;
    min-height: 3.75rem;
}

.result-text {
    flex: 1;
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-word;
    font-weight: 600;
    color: var(--frost-deep);
    line-height: 1.45;
    padding-block: 0.15rem;
}

.counter {
    margin-top: 0.15rem;
}

.history {
    display: grid;
    gap: 0.85rem;
    margin-top: 0.75rem;
    padding-top: 1.15rem;
    border-top: 1px solid var(--line);
}

.history > h2 {
    margin: 0;
}

.history-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    max-height: 18rem;
    overflow: auto;
    background: var(--paper-2);
}

.history-item {
    padding: 1rem 1.1rem;
    border-block-end: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.85rem 1rem;
    flex-wrap: wrap;
}

.history-item:last-child {
    border-block-end: none;
}

.history-chpu {
    font-weight: 600;
    color: var(--frost-deep);
}

.history-original {
    color: var(--ink-soft);
    font-size: 0.88rem;
}

.preview {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    padding: 1rem;
}

.preview img {
    width: min(100%, 260px);
    height: auto;
    background: #fff;
    padding: 0.5rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.preview-header {
    padding: 0.75rem 1rem;
    border-block-end: 1px solid var(--line);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--frost-deep);
    background: color-mix(in srgb, var(--frost) 8%, white);
}

.preview-content {
    padding: 1rem;
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(
            45deg,
            #eceff2 25%,
            transparent 25%,
            transparent 75%,
            #eceff2 75%
        ),
        linear-gradient(
            45deg,
            #eceff2 25%,
            transparent 25%,
            transparent 75%,
            #eceff2 75%
        );
    background-size: 16px 16px;
    background-position:
        0 0,
        8px 8px;
}

.meta {
    margin-top: 0.85rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    justify-content: center;
}

a.download {
    font-weight: 600;
    color: var(--frost-deep);
    text-decoration: none;
}

a.download:hover {
    color: var(--signal);
}

.format-selector {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1rem;
    padding: 0.85rem 1rem;
    margin: 1rem auto;
    max-width: 28rem;
}

.format-option {
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper-2);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
}

.format-option.active {
    background: var(--ink);
    color: var(--paper-2);
    border-color: var(--ink);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--frost) 10%, white);
    color: var(--frost-deep);
    font-weight: 600;
    font-size: 0.88rem;
}

.spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid color-mix(in srgb, var(--frost) 25%, transparent);
    border-top-color: var(--frost);
    animation: tool-spin 0.8s linear infinite;
}

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

.notification {
    position: fixed;
    inset-block-end: 1.25rem;
    inset-inline-end: 1.25rem;
    z-index: 1000;
    padding: 0.85rem 1.15rem;
    background: var(--ink);
    color: var(--paper-2);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    transform: translateY(4rem);
    opacity: 0;
    transition:
        transform 0.3s var(--ease),
        opacity 0.3s var(--ease);
    max-width: calc(100vw - 2rem);
}

.notification.show {
    transform: none;
    opacity: 1;
}

.switch {
    position: relative;
    display: inline-block;
    width: 2.75rem;
    height: 1.4rem;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    inset: 0;
    cursor: pointer;
    background: color-mix(in srgb, var(--ink) 22%, transparent);
    border-radius: var(--radius);
    transition: background 0.2s var(--ease);
}

.slider::before {
    content: "";
    position: absolute;
    height: 1rem;
    width: 1rem;
    left: 0.2rem;
    bottom: 0.2rem;
    background: #fff;
    border-radius: 1px;
    transition: transform 0.2s var(--ease);
}

input:checked + .slider {
    background: var(--frost);
}

input:checked + .slider::before {
    transform: translateX(1.3rem);
}

.auto-convert,
.space-replacement,
.radio-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.65rem 0.85rem;
    margin-bottom: 0;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
}

.radio-option label,
.auto-convert label,
.space-replacement > label {
    margin: 0;
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--ink);
}

@media (min-width: 48rem) {
    .main-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 880px) {
    .layout,
    .preview-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .buttons .btn,
    .controls .btn,
    .btn {
        width: 100%;
    }
}