/* ==========================================================================
   watchrss - Stylesheet

   Aufbau:
     1. Design-Tokens (Farben, Abstaende, Typografie) als CSS-Variablen
     2. Basis / Layout
     3. Komponenten (Karten, Buttons, Felder, Kanalliste, Vorschau)
     4. Hilfsklassen und Responsive

   Farbschema folgt der Systemeinstellung; Basis ist Dunkel.
   ========================================================================== */

/* 1. Tokens ---------------------------------------------------------------- */

:root {
    --bg:            #0d0f13;
    --bg-elevated:   #14171d;
    --bg-sunken:     #0a0c0f;
    --surface:       #171b22;
    --surface-hover: #1d222b;
    --border:        #262c37;
    --border-strong: #38414f;

    --text:          #e8eaee;
    --text-muted:    #98a1b0;
    --text-faint:    #6b7686;

    --accent:        #ff4a34;
    --accent-hover:  #ff6350;
    --accent-soft:   rgba(255, 74, 52, 0.12);
    --accent-text:   #ffffff;

    --long:          #5aa9ff;
    --long-soft:     rgba(90, 169, 255, 0.14);
    --short:         #ffb43a;
    --short-soft:    rgba(255, 180, 58, 0.14);
    --danger:        #ff6b6b;
    --danger-soft:   rgba(255, 107, 107, 0.12);

    --radius-sm: 8px;
    --radius:    14px;
    --radius-lg: 20px;

    --space-1: 0.35rem;
    --space-2: 0.7rem;
    --space-3: 1.1rem;
    --space-4: 1.7rem;
    --space-5: 2.6rem;

    --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 12px 32px -12px rgba(0, 0, 0, 0.6);
    --ring:   0 0 0 3px var(--accent-soft);

    --content-width: 54rem;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg:            #f7f7f9;
        --bg-elevated:   #ffffff;
        --bg-sunken:     #eeeff3;
        --surface:       #ffffff;
        --surface-hover: #f4f5f8;
        --border:        #e2e4ea;
        --border-strong: #c8ccd6;

        --text:          #14171d;
        --text-muted:    #5b6472;
        --text-faint:    #838d9c;

        --long:          #1f6feb;
        --long-soft:     rgba(31, 111, 235, 0.1);
        --short:         #b26a00;
        --short-soft:    rgba(178, 106, 0, 0.12);

        --shadow: 0 1px 2px rgba(20, 23, 29, 0.05), 0 12px 28px -16px rgba(20, 23, 29, 0.25);
    }
}

/* 2. Basis ----------------------------------------------------------------- */

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

/* Das hidden-Attribut wirkt nur über das display:none des Browser-Standards.
   Jede eigene display-Angabe (etwa flex auf einer Karte) schlägt das und
   macht das Element sichtbar. Diese Regel dreht das Verhältnis um, damit
   hidden verlässlich versteckt - egal was eine Komponente sonst setzt. */
[hidden] { display: none !important; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0 1rem 4rem;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Dezenter Farbverlauf im Kopfbereich - genug "schick", ohne laut zu sein. */
body::before {
    content: "";
    position: fixed;
    inset: 0 0 auto 0;
    height: 22rem;
    background: radial-gradient(75% 60% at 50% 0%, var(--accent-soft), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.site-header,
.site-main,
.site-footer { position: relative; z-index: 1; }

a { color: inherit; }

code {
    font-family: var(--mono);
    font-size: 0.86em;
    background: var(--bg-sunken);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 0.1em 0.38em;
    white-space: nowrap;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0; }

.h1 { font-size: clamp(1.9rem, 1.2rem + 2.6vw, 3rem); font-weight: 700; }
.h2 { font-size: 1.12rem; font-weight: 650; letter-spacing: -0.01em; }

.lead {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 44rem;
    margin: var(--space-3) auto 0;
}

/* Kopf / Fuss -------------------------------------------------------------- */

.site-header {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-4) 0 var(--space-3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    text-decoration: none;
    font-size: 1.15rem;
    letter-spacing: -0.03em;
}

.wordmark__icon {
    width: 1.35rem;
    height: 1.35rem;
    fill: none;
    stroke: var(--accent);
    stroke-width: 2.1;
    stroke-linecap: round;
}
.wordmark__icon circle { fill: var(--accent); stroke: none; }

.wordmark__text { font-weight: 500; color: var(--text-muted); }
.wordmark__text strong { color: var(--text); font-weight: 700; }

.site-header__claim {
    margin: 0;
    font-size: 0.84rem;
    color: var(--text-faint);
}

.site-main {
    max-width: var(--content-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    /* Abstand zwischen den Karten - großzügig, damit die Schritte klar
       voneinander getrennt wirken. */
    gap: var(--space-4);
}

.site-footer {
    max-width: var(--content-width);
    margin: var(--space-5) auto 0;
    color: var(--text-faint);
    font-size: 0.82rem;
    text-align: center;
}

.hero {
    text-align: center;
    padding: var(--space-4) 0 var(--space-3);
}
.hero--compact { padding-bottom: var(--space-2); }

/* 3. Komponenten ----------------------------------------------------------- */

/* Der Baukasten ist ein <form>; ohne eigenes Layout würden die Karten darin
   direkt aneinanderstoßen (der scheinbare Abstand käme nur von Rahmen und
   Schatten). Gleiche Rhythmik wie .site-main. */
.builder {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow);
}

.card--muted {
    background: transparent;
    box-shadow: none;
    border-style: dashed;
}

.card--centered { text-align: center; }

.card--result {
    /* Die beiden Adressblöcke brauchen sichtbaren Abstand zueinander -
       sonst verschwimmt "öffentlich" mit "geheim". */
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    border-color: var(--border-strong);
    background:
        linear-gradient(var(--surface), var(--surface)) padding-box,
        linear-gradient(140deg, var(--accent), transparent 55%) border-box;
    border: 1px solid transparent;
}

.card__head {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.step {
    display: grid;
    place-items: center;
    width: 1.6rem;
    height: 1.6rem;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
}

.counter {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-faint);
    font-variant-numeric: tabular-nums;
}

.hint {
    margin: 0 0 var(--space-3);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.empty {
    margin: 0;
    padding: var(--space-3);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-faint);
    font-size: 0.9rem;
    text-align: center;
}

/* Eingaben ----------------------------------------------------------------- */

textarea,
input[type="text"],
select {
    width: 100%;
    padding: 0.65rem 0.8rem;
    background: var(--bg-sunken);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea {
    resize: vertical;
    min-height: 6.5rem;
    font-family: var(--mono);
    font-size: 0.88rem;
}

textarea:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: var(--ring);
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.settings {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.field { display: flex; flex-direction: column; gap: 0.3rem; }

.field__label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.field__hint {
    font-size: 0.78rem;
    color: var(--text-faint);
    line-height: 1.45;
}

.field--switch {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 0.6rem;
}
.field--switch .field__hint { grid-column: 2; }
.field--switch input { width: 1.05rem; height: 1.05rem; accent-color: var(--accent); }

.copy-row { display: flex; gap: var(--space-2); }
.copy-row input {
    font-family: var(--mono);
    font-size: 0.82rem;
}

/* Kennzeichnung öffentlich/geheim - Farbe UND Wort, nicht nur Farbe. */
.tag {
    display: inline-block;
    margin-right: 0.35rem;
    padding: 0.05rem 0.45rem;
    border-radius: 999px;
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    vertical-align: 0.08em;
}
.tag--public { background: var(--long-soft);   color: var(--long); }
.tag--secret { background: var(--danger-soft); color: var(--danger); }

/* Schaltfläche, die im Fließtext wie ein Link aussehen soll. */
.linkbtn {
    padding: 0;
    background: none;
    border: none;
    font: inherit;
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;
}
.linkbtn:hover { color: var(--accent-hover); }
.linkbtn:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 4px; }

/* Buttons ------------------------------------------------------------------ */

.btn {
    --btn-bg: var(--surface-hover);
    --btn-fg: var(--text);
    --btn-border: var(--border-strong);

    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    background: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    border-radius: var(--radius);
    font: inherit;
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    transition: transform 0.08s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.btn:hover { border-color: var(--text-faint); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

.btn--primary {
    --btn-bg: var(--accent);
    --btn-fg: var(--accent-text);
    --btn-border: transparent;
}
.btn--primary:hover { --btn-bg: var(--accent-hover); border-color: transparent; }

.btn--ghost { --btn-bg: transparent; }

.btn--lg { padding: 0.8rem 1.6rem; font-size: 1rem; }

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: center;
}

.spinner {
    width: 0.95rem;
    height: 0.95rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Kanalliste --------------------------------------------------------------- */

.channels {
    list-style: none;
    margin: 0 0 var(--space-2);
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.channel {
    display: grid;
    /* Avatar | Name | Filter-Pillen | Entfernen */
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    align-items: center;
    gap: var(--space-2) var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.15s ease, opacity 0.15s ease;
}

.channel:hover { border-color: var(--border-strong); }
.channel.is-muted { opacity: 0.55; }

.channel__avatar {
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-sunken);
    border: 1px solid var(--border);
}

.channel__avatar--placeholder {
    display: grid;
    place-items: center;
    font-weight: 700;
    color: var(--text-faint);
    font-size: 0.95rem;
}

.channel__info { min-width: 0; }

.channel__name {
    display: block;
    font-weight: 600;
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.channel__name:hover { color: var(--accent); }

.channel__meta {
    font-size: 0.76rem;
    color: var(--text-faint);
    font-family: var(--mono);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.channel__controls {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Filter-Pillen: der Zustand ist per Farbe UND Text erkennbar. */
.toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    background: transparent;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    color: var(--text-faint);
    font: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}
.toggle::before {
    content: "";
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.35;
}
.toggle:focus-visible { outline: none; box-shadow: var(--ring); }

.toggle[aria-pressed="true"]::before { opacity: 1; }

.toggle--long[aria-pressed="true"] {
    color: var(--long);
    border-color: var(--long);
    background: var(--long-soft);
}
.toggle--short[aria-pressed="true"] {
    color: var(--short);
    border-color: var(--short);
    background: var(--short-soft);
}

.channel__remove {
    display: grid;
    place-items: center;
    width: 1.9rem;
    height: 1.9rem;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 50%;
    color: var(--text-faint);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.15s ease;
}
.channel__remove:hover { color: var(--danger); background: var(--danger-soft); }
.channel__remove:focus-visible { outline: none; box-shadow: var(--ring); }

/* Fehlerliste -------------------------------------------------------------- */

.errors {
    list-style: none;
    margin: var(--space-2) 0 0;
    padding: var(--space-2) var(--space-3);
    background: var(--danger-soft);
    border: 1px solid var(--danger);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.85rem;
}
.errors li + li { margin-top: 0.3rem; }
.errors code { background: transparent; border: none; padding: 0; color: var(--danger); }

/* Vorschau ----------------------------------------------------------------- */

.preview-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-2);
}

.preview-item {
    display: grid;
    grid-template-columns: 8rem 1fr;
    gap: var(--space-3);
    align-items: start;
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border);
}
.preview-item:last-child { border-bottom: none; padding-bottom: 0; }

.preview-item__thumb {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--bg-sunken);
}

.preview-item__title {
    font-weight: 600;
    text-decoration: none;
    line-height: 1.35;
}
.preview-item__title:hover { color: var(--accent); }

.preview-item__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin: 0.35rem 0 0;
    font-size: 0.78rem;
    color: var(--text-faint);
}

.badge {
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.badge--long  { background: var(--long-soft);  color: var(--long); }
.badge--short { background: var(--short-soft); color: var(--short); }

/* Erklaerliste ------------------------------------------------------------- */

.steps {
    margin: var(--space-2) 0 0;
    padding-left: 1.2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.steps li + li { margin-top: var(--space-2); }
.steps strong { color: var(--text); }

/* Toast -------------------------------------------------------------------- */

.toast {
    position: fixed;
    left: 50%;
    bottom: 1.5rem;
    transform: translate(-50%, 1rem);
    padding: 0.7rem 1.2rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    box-shadow: var(--shadow);
    font-size: 0.88rem;
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 50;
    max-width: calc(100vw - 2rem);
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.toast.is-error { border-color: var(--danger); color: var(--danger); }

/* 4. Hilfsklassen / Responsive --------------------------------------------- */

.visually-hidden,
.skip-link:not(:focus) {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.skip-link:focus {
    position: fixed;
    top: 0.6rem; left: 0.6rem;
    z-index: 100;
    padding: 0.5rem 0.9rem;
    background: var(--accent);
    color: var(--accent-text);
    border-radius: var(--radius-sm);
}

@media (min-width: 40rem) {
    .input-row { flex-direction: row; align-items: flex-start; }
    .input-row textarea { flex: 1; }
    .input-row .btn { margin-top: 0.1rem; }
}

@media (max-width: 34rem) {
    .channel {
        grid-template-columns: auto 1fr auto;
        grid-template-areas:
            "avatar info remove"
            "controls controls controls";
    }
    .channel__avatar   { grid-area: avatar; }
    .channel__info     { grid-area: info; }
    .channel__remove   { grid-area: remove; }
    .channel__controls { grid-area: controls; }

    .preview-item { grid-template-columns: 5.5rem 1fr; gap: var(--space-2); }
    .card { padding: var(--space-3); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}