/* ============================================================
   encoder-rechner.css  —  Encoder / Auflösung Rechner
   Accent: #1B5E20 (forest green)
   ============================================================ */

:root {
    --er-accent:        #1B5E20;
    --er-accent-light:  #2E7D32;
    --er-accent-bg:     #E8F5E9;
    --er-accent-border: #A5D6A7;
    --er-surface:       #ffffff;
    --er-surface-2:     #F1F8F2;
    --er-border:        #C8E6C9;
    --er-text:          #1a2e1a;
    --er-muted:         #5a7a5a;
    --er-warn:          #E65100;
    --er-warn-bg:       #FFF3E0;
    --er-warn-border:   #FFCC80;
    --er-ok:            #1B5E20;
    --er-radius:        10px;
    --er-shadow:        0 2px 8px rgba(27,94,32,.10);
}

/* ── Page wrapper ──────────────────────────────────────────── */
.er-page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem 1.75rem 3rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ── Header ────────────────────────────────────────────────── */
.er-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem 1.75rem;
    background: linear-gradient(135deg, var(--er-accent) 0%, var(--er-accent-light) 100%);
    border-radius: var(--er-radius);
    color: #fff;
}

.er-header-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(255,255,255,.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}

.er-title {
    font-size: 1.45rem;
    font-weight: 700;
    margin: 0 0 .2rem;
    color: #fff;
}

.er-subtitle {
    margin: 0;
    font-size: .875rem;
    opacity: .85;
    color: #fff;
}

/* ── Presets ────────────────────────────────────────────────── */
.er-presets {
    display: flex;
    align-items: center;
    gap: .6rem;
    flex-wrap: wrap;
}

.er-preset-label {
    font-size: .8rem;
    font-weight: 600;
    color: var(--er-muted);
    white-space: nowrap;
}

.er-preset-btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .42rem .9rem;
    background: var(--er-surface);
    border: 1.5px solid var(--er-border);
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--er-accent);
    cursor: pointer;
    transition: all .18s;
}

.er-preset-btn:hover {
    background: var(--er-accent-bg);
    border-color: var(--er-accent);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(27,94,32,.18);
}

/* ── Two-panel layout ───────────────────────────────────────── */
.er-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* ── Left panel ─────────────────────────────────────────────── */
.er-panel-left {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.er-section {
    background: var(--er-surface);
    border: 1px solid var(--er-border);
    border-radius: var(--er-radius);
    padding: 1.1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    box-shadow: var(--er-shadow);
}

.er-section-title {
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--er-accent);
    display: flex;
    align-items: center;
    gap: .45rem;
    padding-bottom: .6rem;
    border-bottom: 1.5px solid var(--er-border);
}

.er-field-row {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.er-label {
    font-size: .8rem;
    font-weight: 500;
    color: var(--er-text);
    flex: 1;
    min-width: 0;
}

.er-input-wrap {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1.5px solid var(--er-border);
    border-radius: 7px;
    overflow: hidden;
    background: var(--er-surface);
    transition: border-color .15s;
}

.er-input-wrap:focus-within {
    border-color: var(--er-accent);
    box-shadow: 0 0 0 3px rgba(27,94,32,.1);
}

.er-input {
    border: none;
    outline: none;
    padding: .45rem .6rem;
    font-size: .88rem;
    width: 100px;
    background: transparent;
    color: var(--er-text);
    font-family: 'Consolas', monospace;
    text-align: right;
}

.er-unit {
    padding: .45rem .55rem;
    font-size: .75rem;
    background: var(--er-surface-2);
    color: var(--er-muted);
    border-left: 1px solid var(--er-border);
    white-space: nowrap;
    font-weight: 500;
}

.er-select {
    border: 1.5px solid var(--er-border);
    border-radius: 7px;
    padding: .45rem .6rem;
    font-size: .82rem;
    color: var(--er-text);
    background: var(--er-surface);
    cursor: pointer;
    outline: none;
    transition: border-color .15s;
    width: 100%;
    max-width: 200px;
}

.er-select:focus {
    border-color: var(--er-accent);
    box-shadow: 0 0 0 3px rgba(27,94,32,.1);
}

.er-calc-row {
    padding: .3rem .5rem;
    background: var(--er-accent-bg);
    border-radius: 6px;
}

.er-calc-val {
    font-size: .9rem;
    font-weight: 700;
    color: var(--er-accent);
    font-family: 'Consolas', monospace;
    margin-left: auto;
}

.er-hint {
    font-size: .76rem;
    color: var(--er-muted);
    background: var(--er-surface-2);
    border-radius: 6px;
    padding: .5rem .7rem;
    display: flex;
    gap: .45rem;
    align-items: flex-start;
    line-height: 1.4;
}

.er-hint i {
    flex-shrink: 0;
    margin-top: .1rem;
    color: var(--er-accent-light);
}

/* ── Right panel ────────────────────────────────────────────── */
.er-panel-right {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.er-result-section {
    background: var(--er-surface);
    border: 1px solid var(--er-border);
    border-radius: var(--er-radius);
    padding: 1.1rem 1.25rem;
    box-shadow: var(--er-shadow);
}

.er-result-title {
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--er-accent);
    display: flex;
    align-items: center;
    gap: .45rem;
    margin-bottom: .85rem;
    padding-bottom: .6rem;
    border-bottom: 1.5px solid var(--er-border);
}

/* ── Result cards ───────────────────────────────────────────── */
.er-card-grid {
    display: grid;
    gap: .75rem;
}

.er-grid-2 { grid-template-columns: repeat(2, 1fr); }
.er-grid-3 { grid-template-columns: repeat(3, 1fr); }

.er-card {
    background: var(--er-surface-2);
    border: 1px solid var(--er-border);
    border-radius: 8px;
    padding: .85rem 1rem;
    transition: box-shadow .15s;
}

.er-card:hover {
    box-shadow: 0 3px 10px rgba(27,94,32,.12);
}

.er-card-accent {
    background: var(--er-accent-bg);
    border-color: var(--er-accent-border);
    border-left: 4px solid var(--er-accent);
}

.er-card-label {
    font-size: .73rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--er-muted);
    margin-bottom: .35rem;
}

.er-card-value {
    font-size: 1.22rem;
    font-weight: 700;
    color: var(--er-text);
    font-family: 'Consolas', monospace;
    line-height: 1.15;
    word-break: break-all;
}

.er-card-accent .er-card-value {
    color: var(--er-accent);
    font-size: 1.35rem;
}

.er-card-sub {
    font-size: .75rem;
    color: var(--er-muted);
    margin-top: .25rem;
    font-family: 'Consolas', monospace;
}

/* ── Frequency warning states ───────────────────────────────── */
.er-card.er-warn {
    background: var(--er-warn-bg);
    border-color: var(--er-warn-border);
    border-left: 4px solid var(--er-warn);
}

.er-card.er-warn .er-card-value {
    color: var(--er-warn);
}

.er-card.er-ok {
    border-left: 4px solid var(--er-accent);
}

.er-card.er-ok .er-card-value {
    color: var(--er-accent);
}

/* ── Frequency hint banner ──────────────────────────────────── */
.er-freq-hint {
    margin-top: .7rem;
    padding: .55rem .8rem;
    border-radius: 7px;
    font-size: .8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: .5rem;
}

.er-freq-hint.er-hint-warn {
    background: var(--er-warn-bg);
    border: 1px solid var(--er-warn-border);
    color: var(--er-warn);
}

.er-freq-hint.er-hint-ok {
    background: var(--er-accent-bg);
    border: 1px solid var(--er-accent-border);
    color: var(--er-accent);
}

/* ── Notes / reference section ──────────────────────────────── */
.er-notes {
    margin-top: .5rem;
}

.er-note-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.er-note-card {
    background: var(--er-surface);
    border: 1px solid var(--er-border);
    border-radius: var(--er-radius);
    padding: 1.1rem 1.25rem;
    font-size: .82rem;
    line-height: 1.55;
    color: var(--er-text);
    box-shadow: var(--er-shadow);
}

.er-note-title {
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--er-accent);
    display: flex;
    align-items: center;
    gap: .4rem;
    margin-bottom: .75rem;
    padding-bottom: .55rem;
    border-bottom: 1.5px solid var(--er-border);
}

.er-ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .8rem;
}

.er-ref-table th {
    text-align: left;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--er-muted);
    padding: .3rem .4rem;
    border-bottom: 1.5px solid var(--er-border);
}

.er-ref-table td {
    padding: .28rem .4rem;
    border-bottom: 1px solid var(--er-surface-2);
    font-family: 'Consolas', monospace;
}

.er-ref-table td:last-child {
    font-family: inherit;
    color: var(--er-muted);
}

.er-ref-table tr:hover td {
    background: var(--er-accent-bg);
}

.er-note-card code {
    background: var(--er-surface-2);
    border: 1px solid var(--er-border);
    border-radius: 4px;
    padding: .1rem .35rem;
    font-size: .8em;
    font-family: 'Consolas', monospace;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .er-layout {
        grid-template-columns: 1fr;
    }

    .er-note-grid {
        grid-template-columns: 1fr 1fr;
    }

    .er-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .er-page {
        padding: 1rem;
    }

    .er-grid-2,
    .er-grid-3 {
        grid-template-columns: 1fr;
    }

    .er-note-grid {
        grid-template-columns: 1fr;
    }

    .er-presets {
        flex-direction: column;
        align-items: flex-start;
    }
}