/* ============================================================
   pid-rechner.css  —  PID Parameter Rechner
   Accent: #4527A0 (deep purple)
   ============================================================ */

:root {
    --pid-accent:         #4527A0;
    --pid-accent-light:   #5E35B1;
    --pid-accent-bg:      #EDE7F6;
    --pid-accent-border:  #B39DDB;
    --pid-surface:        #ffffff;
    --pid-surface-2:      #F5F3FB;
    --pid-border:         #D1C4E9;
    --pid-text:           #1a1530;
    --pid-muted:          #7E57C2;
    --pid-warn:           #E65100;
    --pid-warn-bg:        #FFF3E0;

    /* Controller badge colors */
    --pid-p-color:        #1B5E20;
    --pid-pi-color:       #01579B;
    --pid-pid-color:      #4527A0;

    --pid-radius:         10px;
    --pid-shadow:         0 2px 8px rgba(69,39,160,.10);
}

/* ── Page ──────────────────────────────────────────────────── */
.pid-page {
    max-width: 1340px;
    margin: 0 auto;
    padding: 1.5rem 1.75rem 3rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.pid-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;
}

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

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

/* ── Method tabs ────────────────────────────────────────────── */
.pid-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .6rem;
}

.pid-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .2rem;
    padding: .85rem .5rem;
    background: var(--pid-surface);
    border: 2px solid var(--pid-border);
    border-radius: var(--pid-radius);
    cursor: pointer;
    transition: all .18s;
    font-size: .88rem;
    font-weight: 600;
    color: var(--pid-muted);
    line-height: 1.2;
}

.pid-tab i {
    font-size: 1.25rem;
    margin-bottom: .1rem;
}

.pid-tab small {
    font-size: .72rem;
    font-weight: 400;
    opacity: .75;
}

.pid-tab:hover {
    border-color: var(--pid-accent);
    color: var(--pid-accent);
    background: var(--pid-accent-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(69,39,160,.15);
}

.pid-tab-active {
    border-color: var(--pid-accent);
    background: var(--pid-accent);
    color: #fff;
    box-shadow: 0 4px 12px rgba(69,39,160,.3);
}

.pid-tab-active small {
    opacity: .85;
}

.pid-tab-active:hover {
    background: var(--pid-accent-light);
    color: #fff;
}

/* ── Layout ─────────────────────────────────────────────────── */
.pid-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* ── Left panel ─────────────────────────────────────────────── */
.pid-panel-left {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.pid-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

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

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

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

.pid-label-hint {
    display: block;
    font-size: .7rem;
    font-weight: 400;
    color: var(--pid-muted);
    margin-top: .05rem;
}

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

.pid-input-wrap:focus-within {
    border-color: var(--pid-accent);
    box-shadow: 0 0 0 3px rgba(69,39,160,.1);
}

.pid-input {
    border: none;
    outline: none;
    padding: .45rem .6rem;
    font-size: .88rem;
    width: 90px;
    background: transparent;
    color: var(--pid-text);
    font-family: 'Consolas', monospace;
    text-align: right;
}

.pid-unit {
    padding: .45rem .5rem;
    font-size: .75rem;
    background: var(--pid-surface-2);
    color: var(--pid-muted);
    border-left: 1px solid var(--pid-border);
    white-space: nowrap;
    font-weight: 500;
    min-width: 28px;
    text-align: center;
}

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

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

.pid-hint {
    font-size: .76rem;
    color: var(--pid-muted);
    background: var(--pid-surface-2);
    border-radius: 6px;
    padding: .5rem .7rem;
    display: flex;
    gap: .45rem;
    align-items: flex-start;
    line-height: 1.45;
}

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

.pid-hint i.fa-triangle-exclamation {
    color: var(--pid-warn);
}

/* Lambda slider */
.pid-slider-row {
    display: flex;
    align-items: center;
    gap: .6rem;
}

.pid-slider-lbl {
    font-size: .73rem;
    color: var(--pid-muted);
    white-space: nowrap;
    min-width: 42px;
}

.pid-slider-lbl:last-child {
    text-align: right;
}

.pid-slider {
    flex: 1;
    accent-color: var(--pid-accent);
    height: 4px;
    cursor: pointer;
}

/* Radio group (CHR) */
.pid-radio-group {
    display: flex;
    flex-direction: column;
    gap: .45rem;
}

.pid-radio-lbl {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .82rem;
    cursor: pointer;
    color: var(--pid-text);
}

.pid-radio-lbl input[type="radio"] {
    accent-color: var(--pid-accent);
    width: 15px;
    height: 15px;
    cursor: pointer;
    flex-shrink: 0;
}

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

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

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

/* ── Comparison table ───────────────────────────────────────── */
.pid-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .85rem;
}

.pid-table thead tr {
    background: var(--pid-surface-2);
}

.pid-table th {
    text-align: left;
    font-size: .73rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--pid-muted);
    padding: .55rem .75rem;
    border-bottom: 2px solid var(--pid-border);
}

.pid-table td {
    padding: .65rem .75rem;
    border-bottom: 1px solid var(--pid-border);
    vertical-align: middle;
}

.pid-row-p:hover td,
.pid-row-pi:hover td,
.pid-row-pid:hover td {
    background: var(--pid-surface-2);
}

.pid-val {
    font-family: 'Consolas', monospace;
    font-size: .88rem;
    font-weight: 600;
    color: var(--pid-text);
}

.pid-dash {
    color: var(--pid-border);
}

/* Controller badges */
.pid-ctrl-badge {
    display: inline-block;
    padding: .22rem .6rem;
    border-radius: 5px;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .05em;
}

.pid-badge-p {
    background: #E8F5E9;
    color: var(--pid-p-color);
    border: 1px solid #A5D6A7;
}

.pid-badge-pi {
    background: #E3F2FD;
    color: var(--pid-pi-color);
    border: 1px solid #90CAF9;
}

.pid-badge-pid {
    background: var(--pid-accent-bg);
    color: var(--pid-pid-color);
    border: 1px solid var(--pid-accent-border);
}

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

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

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

.pid-card:hover {
    box-shadow: 0 3px 10px rgba(69,39,160,.12);
}

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

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

.pid-card-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--pid-text);
    font-family: 'Consolas', monospace;
    line-height: 1.15;
    word-break: break-all;
}

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

.pid-card-sub {
    font-size: .73rem;
    color: var(--pid-muted);
    margin-top: .25rem;
}

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

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

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

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

.pid-note-hint {
    margin-top: .6rem;
    font-size: .75rem;
    color: var(--pid-muted);
    font-style: italic;
}

.pid-ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .78rem;
}

.pid-ref-table th {
    text-align: left;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--pid-muted);
    padding: .25rem .3rem;
    border-bottom: 1.5px solid var(--pid-border);
}

.pid-ref-table td {
    padding: .25rem .3rem;
    border-bottom: 1px solid var(--pid-surface-2);
    font-family: 'Consolas', monospace;
    font-size: .76rem;
}

.pid-ref-table td:first-child {
    font-weight: 700;
    color: var(--pid-accent);
    min-width: 34px;
}

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

.pid-note-card code {
    display: inline-block;
    background: var(--pid-surface-2);
    border: 1px solid var(--pid-border);
    border-radius: 4px;
    padding: .08rem .35rem;
    font-size: .8em;
    font-family: 'Consolas', monospace;
    margin: .05rem 0;
}

/* ── Sprungantwort-Graf ─────────────────────────────────────── */
.pid-sprung-wrap {
    border: 1.5px solid var(--pid-border);
    border-radius: var(--pid-radius);
    background: var(--pid-surface);
    box-shadow: var(--pid-shadow);
    overflow: hidden;
}

.pid-sprung-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .95rem 1.25rem;
    background: var(--pid-surface-2);
    border: none;
    cursor: pointer;
    font-size: .9rem;
    font-weight: 600;
    color: var(--pid-accent);
    transition: background .15s;
    text-align: left;
}

.pid-sprung-toggle:hover {
    background: var(--pid-accent-bg);
}

.pid-sprung-toggle-left {
    display: flex;
    align-items: center;
    gap: .65rem;
}

.pid-sprung-badge {
    font-size: .72rem;
    font-weight: 500;
    background: var(--pid-accent-bg);
    border: 1px solid var(--pid-accent-border);
    color: var(--pid-accent);
    border-radius: 20px;
    padding: .15rem .55rem;
}

.pid-sprung-chevron {
    font-size: .8rem;
    transition: transform .25s;
    color: var(--pid-muted);
}

.pid-sprung-wrap[data-open="true"] .pid-sprung-chevron {
    transform: rotate(180deg);
}

.pid-sprung-body {
    display: none;
    border-top: 1.5px solid var(--pid-border);
}

.pid-sprung-body.pid-sprung-open {
    display: block;
}

.pid-sprung-inner {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Toolbar */
.pid-sprung-toolbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pid-sprung-ctrl-group {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.pid-sprung-ctrl-right {
    margin-left: auto;
}

.pid-sprung-lbl {
    font-size: .78rem;
    font-weight: 600;
    color: var(--pid-muted);
    white-space: nowrap;
}

.pid-sprung-sel {
    border: 1.5px solid var(--pid-border);
    border-radius: 7px;
    padding: .38rem .55rem;
    font-size: .82rem;
    color: var(--pid-text);
    background: var(--pid-surface);
    cursor: pointer;
    outline: none;
}

.pid-sprung-sel:focus {
    border-color: var(--pid-accent);
}

.pid-sprung-input-wrap {
    display: flex;
    align-items: center;
    border: 1.5px solid var(--pid-border);
    border-radius: 7px;
    overflow: hidden;
    background: var(--pid-surface);
}

.pid-sprung-input-wrap:focus-within {
    border-color: var(--pid-accent);
}

.pid-sprung-input {
    border: none;
    outline: none;
    padding: .38rem .5rem;
    font-size: .82rem;
    width: 62px;
    text-align: right;
    background: transparent;
    color: var(--pid-text);
    font-family: 'Consolas', monospace;
}

.pid-sprung-unit {
    padding: .38rem .45rem;
    font-size: .74rem;
    background: var(--pid-surface-2);
    color: var(--pid-muted);
    border-left: 1px solid var(--pid-border);
}

/* Mode buttons */
.pid-sprung-mode-btns {
    display: flex;
    gap: .3rem;
}

.pid-sprung-mode-btn {
    padding: .38rem .75rem;
    border: 1.5px solid var(--pid-border);
    border-radius: 6px;
    background: var(--pid-surface);
    font-size: .8rem;
    font-weight: 500;
    color: var(--pid-muted);
    cursor: pointer;
    transition: all .15s;
}

.pid-sprung-mode-btn:hover {
    border-color: var(--pid-accent);
    color: var(--pid-accent);
}

.pid-mode-active {
    background: var(--pid-accent-bg);
    border-color: var(--pid-accent);
    color: var(--pid-accent);
    font-weight: 600;
}

/* Action buttons */
.pid-sprung-btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .42rem .85rem;
    border-radius: 7px;
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: all .15s;
}

.pid-btn-ghost {
    background: var(--pid-surface);
    border-color: var(--pid-border);
    color: var(--pid-muted);
}

.pid-btn-ghost:hover {
    border-color: var(--pid-accent);
    color: var(--pid-accent);
    background: var(--pid-accent-bg);
}

.pid-btn-primary {
    background: var(--pid-accent);
    color: #fff;
    border-color: var(--pid-accent);
}

.pid-btn-primary:hover {
    background: var(--pid-accent-light);
    border-color: var(--pid-accent-light);
    box-shadow: 0 3px 10px rgba(69,39,160,.3);
}

.pid-btn-accent {
    background: #1B5E20;
    color: #fff;
    border-color: #1B5E20;
    padding: .5rem 1.1rem;
    font-size: .85rem;
}

.pid-btn-accent:hover {
    background: #2E7D32;
    border-color: #2E7D32;
    box-shadow: 0 3px 10px rgba(27,94,32,.35);
}

/* Canvas */
.pid-sprung-canvas-wrap {
    position: relative;
    border: 1.5px solid var(--pid-border);
    border-radius: 8px;
    background: #FAFBFF;
    overflow: hidden;
}

.pid-sprung-canvas {
    display: block;
    width: 100%;
    height: auto;
    cursor: crosshair;
    touch-action: none;
}

.pid-sprung-canvas-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: .85rem;
    color: #B0BEC5;
    display: flex;
    align-items: center;
    gap: .5rem;
    pointer-events: none;
    transition: opacity .3s;
}

.pid-sprung-canvas-hint.pid-hint-hidden {
    opacity: 0;
}

/* Results */
.pid-sprung-results {
    background: var(--pid-surface-2);
    border: 1.5px solid var(--pid-accent-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    display: none;
}

.pid-sprung-results.pid-results-visible {
    display: block;
}

.pid-sprung-res-title {
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--pid-accent);
    display: flex;
    align-items: center;
    gap: .4rem;
    margin-bottom: .85rem;
    padding-bottom: .55rem;
    border-bottom: 1.5px solid var(--pid-accent-border);
}

.pid-sprung-res-cards {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-wrap: wrap;
}

.pid-sprung-res-card {
    background: var(--pid-surface);
    border: 1px solid var(--pid-border);
    border-radius: 8px;
    padding: .7rem 1rem;
    min-width: 90px;
    flex: 1;
}

.pid-sprung-res-label {
    font-size: .73rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--pid-muted);
    margin-bottom: .25rem;
}

.pid-sprung-res-val {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--pid-accent);
    font-family: 'Consolas', monospace;
}

.pid-sprung-res-sub {
    font-size: .72rem;
    color: var(--pid-muted);
    margin-top: .1rem;
}

.pid-sprung-res-transfer {
    margin-left: auto;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1100px) {
    .pid-layout {
        grid-template-columns: 1fr;
    }
    .pid-note-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pid-tabs {
        grid-template-columns: repeat(2, 1fr);
    }
    .pid-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .pid-note-grid {
        grid-template-columns: 1fr;
    }
    .pid-table th:nth-child(n+5),
    .pid-table td:nth-child(n+5) {
        display: none;
    }
}

@media (max-width: 480px) {
    .pid-page { padding: 1rem; }
    .pid-tabs { grid-template-columns: 1fr 1fr; }
    .pid-grid-3 { grid-template-columns: 1fr; }
}