/* ============================================================
    CSS DESIGN-TOKEN-SYSTEM
    Alle Farben, Abstände und Typografie zentral als Variablen.
    Accentfarbe: Teal/Grün — bewusst anders als der Audio-Rechner (Blau).
============================================================ --- */
:root {
    --c-bg:          #f9f9f9;
    --c-surface:     #FFFFFF;
    --c-surface2:    #F0F4FA;
    --c-border:      #E2E8F0;
    --c-accent:      #2C6BFF;
    --c-accent-lt:   #E9F0FF;
    --c-accent-mid:  #1E4BD2;
    --c-accent2:     #3B82F6;
    --c-accent2-lt:  #EFF6FF;
    --c-purple:      #8B5CF6;
    --c-purple-lt:   #F3F0FF;
    --c-warn:        #F59E0B;
    --c-warn-lt:     #FEF3C7;
    --c-red:         #EF4444;
    --c-red-lt:      #FEE2E2;
    --c-text:        #1E293B;
    --c-text2:       #475569;
    --c-text3:       #94A3B8;
    --c-shadow:      0 2px 14px rgba(44,107,255,.08), 0 1px 3px rgba(0,0,0,.04);
    --c-shadow-lg:   0 12px 40px rgba(44,107,255,.12), 0 3px 10px rgba(0,0,0,.06);
    --radius:        14px;
    --radius-sm:     8px;
    --radius-xs:     5px;
    --font:          'Outfit', sans-serif;
    --font-mono:     'JetBrains Mono', monospace;
    --trans:         all .2s ease;
}

/* ============================================================
    RESET & GLOBALE BASIS-STILE
    Normalisiert Browser-Unterschiede; Box-Sizing global gesetzt.
============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--c-bg);
    color: var(--c-text);
    min-height: 100vh;
    padding: 0 0 60px;
    line-height: 1.6;
}

/* ============================================================
    TOPBAR — Kompakte Titelzeile
    Schlanke Navigation, konsistent mit dem Audio-Rechner-Stil.
============================================================ */
.topbar {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.topbar-icon {
    width: 30px; height: 30px;
    background: var(--c-accent-lt);
    border-radius: 7px;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    flex-shrink: 0;
}
.topbar h1 {
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: -.01em;
    color: var(--c-text);
}
.topbar-sep {
    width: 1px; height: 18px;
    background: var(--c-border);
    margin: 0 2px;
}
.topbar-sub {
    font-size: .82rem;
    color: var(--c-text3);
    font-weight: 400;
}

/* ============================================================
    HAUPT-LAYOUT
    Dreispaltig auf Desktop (Eingaben links, Ergebnis rechts);
    einspaltiger Stack auf Tablet/Mobil.
============================================================ */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 20px 0;
}
.layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}
@media (max-width: 800px) {
    .layout { grid-template-columns: 1fr; }
}

/* ============================================================
    KARTEN (Cards)
    Einheitliche weiße Oberflächen mit dezenter Umrandung.
============================================================ */
.card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--c-shadow);
    overflow: hidden;
}
.card + .card { margin-top: 16px; }

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px 12px;
    border-bottom: 1px solid var(--c-border);
}
.card-header-icon {
    width: 30px; height: 30px;
    border-radius: var(--radius-xs);
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    flex-shrink: 0;
}
.card-header h2 {
    font-size: .88rem;
    font-weight: 600;
    letter-spacing: .01em;
    color: var(--c-text);
}
.card-header .sub {
    font-size: .76rem;
    color: var(--c-text3);
    font-weight: 400;
    margin-left: 4px;
}
.card-body { padding: 18px; }

/* ============================================================
    FORMULAR-ELEMENTE
    Beschriftungen, Eingabefelder, Slider, Chips und Selects.
============================================================ */
.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }

label.field-label {
    display: flex;
    align-items: baseline;
    gap: 6px;
    font-size: .78rem;
    font-weight: 600;
    color: var(--c-text2);
    text-transform: uppercase;
    letter-spacing: .07em;
    margin-bottom: 7px;
}
label.field-label .unit {
    font-size: .72rem;
    color: var(--c-text3);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
}

/* Zahlen-Eingabefeld mit Einheit-Badge rechts */
.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.input-wrap input[type="number"] {
    width: 100%;
    padding: 10px 64px 10px 13px;
    border: 1.5px solid var(--c-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: .9rem;
    color: var(--c-text);
    background: var(--c-surface2);
    outline: none;
    transition: var(--trans);
    appearance: textfield;
}
.input-wrap input[type="number"]::-webkit-inner-spin-button,
.input-wrap input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
.input-wrap input[type="number"]:focus {
    border-color: var(--c-accent);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(15,138,101,.1);
}
.input-unit {
    position: absolute; right: 10px;
    font-size: .72rem;
    color: var(--c-text3);
    font-weight: 500;
    pointer-events: none;
    white-space: nowrap;
}

/* Select-Dropdown (z.B. für Farbunterabtastung, Codec) */
.styled-select {
    width: 100%;
    padding: 10px 36px 10px 13px;
    border: 1.5px solid var(--c-border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: .88rem;
    color: var(--c-text);
    background: var(--c-surface2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2393ADA4' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 12px center;
    outline: none;
    transition: var(--trans);
    appearance: none;
    cursor: pointer;
}
.styled-select:focus {
    border-color: var(--c-accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(15,138,101,.1);
}

/* Slider (Bereichsregler) */
.slider-wrap { display: flex; align-items: center; gap: 10px; margin-top: 7px; }
input[type="range"] {
    -webkit-appearance: none;
    flex: 1;
    height: 4px;
    border-radius: 99px;
    background: var(--c-border);
    outline: none;
    cursor: pointer;
    transition: var(--trans);
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--c-accent);
    border: 2px solid #fff;
    box-shadow: 0 1px 5px rgba(15,138,101,.4);
    transition: var(--trans);
}
input[type="range"]:hover::-webkit-slider-thumb { transform: scale(1.15); }
.slider-val {
    font-size: .78rem;
    font-family: var(--font-mono);
    color: var(--c-accent);
    font-weight: 500;
    min-width: 38px;
    text-align: right;
}

/* Voreinstellungs-Chips (Schnellauswahl-Buttons) */
.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; }
.chip {
    padding: 4px 10px;
    border-radius: 99px;
    border: 1.5px solid var(--c-border);
    font-size: .74rem;
    font-weight: 500;
    color: var(--c-text2);
    background: var(--c-surface);
    cursor: pointer;
    transition: var(--trans);
    white-space: nowrap;
    font-family: var(--font);
}
.chip:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
    background: var(--c-accent-lt);
}
.chip.active {
    border-color: var(--c-accent);
    background: var(--c-accent);
    color: #fff;
}

/* ============================================================
    CODEC-EFFIZIENZ-BADGE
    Kleiner farbiger Hinweis neben dem Codec-Select.
============================================================ */
.codec-info {
    display: none;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-xs);
    font-size: .75rem;
    line-height: 1.4;
    transition: var(--trans);
}
.codec-info.gut   { background: var(--c-accent-lt); color: var(--c-accent); border: 1px solid rgba(15,138,101,.2); }
.codec-info.mittel { background: var(--c-accent2-lt); color: var(--c-accent2); border: 1px solid rgba(232,130,12,.2); }
.codec-info.schlecht { background: var(--c-purple-lt); color: var(--c-purple); border: 1px solid rgba(108,79,200,.2); }

/* ============================================================
    HDR-TOGGLE (Ein/Aus Schalter)
    Für HDR-Inhalte wird ein Bit-Tiefenfaktor angewendet.
============================================================ */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}
.toggle-label { font-size: .84rem; color: var(--c-text2); font-weight: 500; }
.toggle-desc  { font-size: .73rem; color: var(--c-text3); margin-top: 1px; }
.toggle-track {
    position: relative;
    width: 36px; height: 20px;
    background: var(--c-border);
    border-radius: 99px;
    cursor: pointer;
    transition: var(--trans);
    flex-shrink: 0;
}
.toggle-track.on { background: var(--c-accent); }
.toggle-thumb {
    position: absolute;
    top: 2px; left: 2px;
    width: 16px; height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: var(--trans);
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
.toggle-track.on .toggle-thumb { left: 18px; }

/* ============================================================
    ERGEBNIS-BEREICH (rechte Spalte)
    Sticky auf Desktop; normal auf Mobil.
============================================================ */
.right-col .card:first-child { top: 72px; }
@media (max-width: 800px) {
    .right-col .card:first-child { position: static; }
}

/* Haupt-Ergebniswert (groß, prominent) */
.result-main {
    text-align: center;
    padding: 22px 18px 16px;
    border-bottom: 1px solid var(--c-border);
}
.result-label {
    font-size: .72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .09em;
    color: var(--c-text3);
    margin-bottom: 5px;
}
.result-value {
    font-size: clamp(2rem, 5.5vw, 2.7rem);
    font-weight: 600;
    color: var(--c-accent);
    font-family: var(--font-mono);
    letter-spacing: -.03em;
    transition: color .3s;
    line-height: 1.1;
}
.result-unit { font-size: .95rem; color: var(--c-text2); margin-top: 2px; }

/* Dezimal / Binär Umschalter */
.mode-toggle {
    display: flex;
    background: var(--c-surface2);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 3px;
    margin: 12px auto 0;
    width: fit-content;
}
.mode-btn {
    padding: 5px 14px;
    border-radius: 5px;
    font-size: .76rem;
    font-weight: 600;
    color: var(--c-text2);
    cursor: pointer;
    transition: var(--trans);
    border: none;
    background: transparent;
    font-family: var(--font);
}
.mode-btn.active {
    background: var(--c-surface);
    color: var(--c-accent);
    box-shadow: 0 1px 4px rgba(0,0,0,.1);
}

/* Tabellarische Einheitenzeilen */
.result-rows { padding: 14px 18px; border-bottom: 1px solid var(--c-border); }
.rows-section-label {
    font-size: .68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--c-text3);
    margin-bottom: 7px;
}
.result-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--c-surface2);
    gap: 10px;
}
.result-row:last-child { border-bottom: none; }
.rr-left { display: flex; align-items: center; gap: 7px; }
.rr-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.rr-name { font-size: .79rem; color: var(--c-text2); }
.rr-val {
    font-family: var(--font-mono);
    font-size: .81rem;
    font-weight: 500;
    color: var(--c-text);
    text-align: right;
}

/* Binär-Hinweisfeld (gelb) */
.binary-box {
    margin: 14px 18px;
    background: var(--c-warn-lt);
    border: 1px solid rgba(217,119,6,.22);
    border-radius: var(--radius-sm);
    padding: 13px 14px;
}
.binary-box-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .72rem;
    font-weight: 600;
    color: var(--c-warn);
    text-transform: uppercase;
    letter-spacing: .07em;
    margin-bottom: 7px;
}
.binary-rows .result-row { border-bottom: 1px solid rgba(217,119,6,.1); }
.binary-rows .result-row:last-child { border-bottom: none; }
.binary-rows .rr-name { color: #92621a; }
.binary-rows .rr-val { color: #6b4811; }
.binary-note {
    font-size: .7rem;
    color: #a07020;
    margin-top: 9px;
    line-height: 1.5;
}

/* „Rechenweg zeigen"-Button */
.btn-rechenweg {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    width: calc(100% - 36px);
    margin: 0 18px 18px;
    padding: 10px 16px;
    border: 1.5px solid var(--c-accent);
    border-radius: var(--radius-sm);
    background: var(--c-accent-lt);
    color: var(--c-accent);
    font-family: var(--font);
    font-size: .83rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--trans);
}
.btn-rechenweg:hover {
    background: var(--c-accent);
    color: #fff;
}

/* ============================================================
    BITRATE-ANZEIGE
    Zeigt die berechnete Bitrate in einem farbigen Banner.
============================================================ */
.bitrate-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 18px;
    background: var(--c-accent-lt);
    border-bottom: 1px solid rgba(15,138,101,.15);
}
.bitrate-label {
    font-size: .75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--c-text2);
}
.bitrate-val {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--c-accent);
}

/* ============================================================
    VERGLEICHS-KARTE
    Zeigt anschauliche Speicherkarten-Vergleiche.
============================================================ */
.compare-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 9px;
    padding: 14px 18px;
}
.compare-item {
    background: var(--c-surface2);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: 11px 12px;
    text-align: center;
}
.ci-icon { font-size: 1.3rem; margin-bottom: 3px; }
.ci-val {
    font-size: 1.05rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--c-accent);
    line-height: 1.2;
}
.ci-desc { font-size: .68rem; color: var(--c-text2); margin-top: 3px; line-height: 1.3; }

/* ============================================================
    MODAL — Popup für den Rechenweg
    Zentrierter Dialog mit Overlay und sanfter Animation.
============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(8, 18, 14, 0.48);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}
.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}
.modal {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--c-shadow-lg);
    width: 100%;
    max-width: 680px;
    max-height: 86vh;
    display: flex;
    flex-direction: column;
    transform: scale(.96) translateY(12px);
    transition: transform .25s ease;
    overflow: hidden;
}
.modal-overlay.open .modal {
    transform: scale(1) translateY(0);
}
.modal-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 18px;
    border-bottom: 1px solid var(--c-border);
    flex-shrink: 0;
}
.modal-head h3 { font-size: .9rem; font-weight: 600; color: var(--c-text); flex: 1; }
.modal-head .sub { font-size: .75rem; color: var(--c-text3); font-weight: 400; margin-left: 4px; }
.modal-close {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--c-surface2);
    color: var(--c-text2);
    font-size: .9rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--trans);
}
.modal-close:hover { background: var(--c-border); color: var(--c-text); }
.modal-body {
    overflow-y: auto;
    padding: 18px;
    flex: 1;
}
.modal-body::-webkit-scrollbar { width: 4px; }
.modal-body::-webkit-scrollbar-track { background: transparent; }
.modal-body::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 99px; }

/* ============================================================
    RECHENWEG-SCHRITTE (im Modal)
============================================================ */
.formula-step {
    display: flex;
    gap: 13px;
    margin-bottom: 16px;
    align-items: flex-start;
}
.formula-step:last-child { margin-bottom: 0; }
.step-num {
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--c-accent);
    color: #fff;
    font-size: .68rem;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}
.step-connector {
    width: 1px; height: 14px;
    background: var(--c-border);
    margin: 0 0 0 11px;
}
.step-content { flex: 1; min-width: 0; }
.step-title { font-size: .82rem; font-weight: 600; color: var(--c-text); margin-bottom: 3px; }
.step-expr {
    font-family: var(--font-mono);
    font-size: .76rem;
    color: var(--c-text2);
    background: var(--c-surface2);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-xs);
    padding: 6px 10px;
    margin: 4px 0;
    word-break: break-all;
    line-height: 1.5;
}
.step-result { font-family: var(--font-mono); font-size: .8rem; color: var(--c-accent); font-weight: 600; }
.step-desc { font-size: .75rem; color: var(--c-text3); margin-top: 2px; line-height: 1.4; }

/* ============================================================
    FLASH-ANIMATION (Echtzeit-Feedback bei Wertänderung)
============================================================ */
@keyframes flash {
    0%   { background: rgba(15,138,101,.1); }
    100% { background: transparent; }
}
.flash { animation: flash .4s ease; border-radius: 6px; }

/* ============================================================
    FOOTER
============================================================ */
footer {
    text-align: center;
    margin-top: 40px;
    font-size: .72rem;
    color: var(--c-text3);
}

/* ============================================================
    RESPONSIVE ANPASSUNGEN
============================================================ */
@media (max-width: 500px) {
    .compare-items { grid-template-columns: 1fr 1fr; }
    .mode-btn { padding: 5px 10px; font-size: .72rem; }
}