:root {
    --bg-primary: #1c1c1c;
    --bg-secondary: #363636;
    --bg-card: #2d2d2d;
    --bg-elevated: #242424;
    --bg-hover: #444;

    --border-primary: #444;
    --border-secondary: #555;

    --text-primary: #e0c097;
    --text-secondary: #b8a07e;
    --text-gold: #b89d63;
    --text-white: #f5eee4;
    --text-danger: #ff6b6b;
    --text-success: #7fd46a;

    --accent-primary: #d4b273;
    --accent-shadow: rgba(212, 178, 115, 0.2);

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

@font-face {
    font-family: "gothic";
    src: url("./assets/font2.ttf") format("truetype");
    font-weight: bold;
    font-style: normal;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100dvh;
    padding: var(--spacing-md);
    font-family: "gothic", sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at 20% 0%, rgba(184, 157, 99, 0.14) 0%, rgba(28, 28, 28, 0) 45%),
        radial-gradient(circle at 80% 100%, rgba(212, 178, 115, 0.12) 0%, rgba(28, 28, 28, 0) 40%),
        linear-gradient(160deg, #121212 0%, #171717 30%, #1f1f1f 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.35;
    background: repeating-linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.02) 0,
        rgba(255, 255, 255, 0.02) 2px,
        rgba(0, 0, 0, 0) 2px,
        rgba(0, 0, 0, 0) 8px
    );
}

.lockpick-app {
    position: relative;
    width: min(1080px, 100%);
    margin: 0 auto;
    display: grid;
    gap: var(--spacing-md);
    z-index: 1;
    animation: rise-in 500ms ease-out;
}

.panel {
    position: relative;
    background: linear-gradient(180deg, rgba(57, 57, 57, 0.7) 0%, rgba(38, 38, 38, 0.85) 100%), var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow:
        0 12px 36px rgba(0, 0, 0, 0.3),
        inset 0 0 0 1px rgba(212, 178, 115, 0.08);
    overflow: hidden;
}

.panel::after {
    content: "";
    position: absolute;
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    bottom: 0;
    height: 18px;
    background: url("./assets/menu-border.svg") repeat-x center;
    opacity: 0.25;
    pointer-events: none;
}

.hero h1 {
    margin: var(--spacing-sm) 0;
    font-size: clamp(1.3rem, 3.7vw, 2rem);
    letter-spacing: 0.04em;
    color: var(--text-white);
    text-shadow: 0 0 14px rgba(212, 178, 115, 0.2);
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.hero-copy,
.section-copy {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.45;
}

.toolbar {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: end;
    gap: var(--spacing-md);
}

.toolbar-group {
    display: grid;
    gap: var(--spacing-sm);
}

label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
}

select,
button {
    font-family: inherit;
}

input,
textarea {
    font-family: inherit;
}

select {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-secondary);
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.toolbar-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.btn {
    border: 1px solid rgba(212, 178, 115, 0.45);
    background: linear-gradient(180deg, #d6b578 0%, #b38f4c 100%);
    color: #231b0d;
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
        transform 120ms ease,
        box-shadow 160ms ease,
        filter 150ms ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--accent-shadow);
    filter: brightness(1.05);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    filter: none;
    transform: none;
    box-shadow: none;
}

.btn-ghost {
    background: linear-gradient(180deg, #4c4c4c 0%, #383838 100%);
    color: var(--text-primary);
    border-color: var(--border-secondary);
}

.stats {
    display: flex;
    gap: var(--spacing-sm);
}

.stat-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 110px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.6rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.72rem;
}

.stat-value {
    margin-top: 2px;
    font-size: 0.95rem;
    color: var(--text-white);
}

h2 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-gold);
}

.cassette-grid {
    display: grid;
    gap: var(--spacing-sm);
}

.cassette-row {
    display: grid;
    grid-template-columns: 88px 1fr auto auto;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(180deg, rgba(55, 55, 55, 0.7), rgba(40, 40, 40, 0.9));
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    padding: 0.45rem;
}

.cassette-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.position-block {
    display: grid;
    gap: 4px;
}

.position-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-secondary);
}

.position-track {
    position: relative;
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid #565656;
    background: #1b1b1b;
}

.position-fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background: linear-gradient(90deg, #9f7d3e 0%, #e0c097 100%);
    transition: width 180ms ease;
}

.position-target {
    position: absolute;
    top: -1px;
    bottom: -1px;
    width: 2px;
    background: #7fd46a;
    box-shadow: 0 0 6px rgba(127, 212, 106, 0.75);
}

.control-btn {
    min-width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-secondary);
    background: linear-gradient(180deg, #474747 0%, #343434 100%);
    color: var(--text-primary);
    cursor: pointer;
}

.control-btn:hover {
    background: var(--bg-hover);
}

.control-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.cassette-row.is-correct {
    border-color: rgba(127, 212, 106, 0.65);
    box-shadow: inset 0 0 0 1px rgba(127, 212, 106, 0.2);
}

.panel-duo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.editor-panel {
  display: grid;
  gap: var(--spacing-md);
}

.dynamic-form {
  display: grid;
  gap: var(--spacing-xl);
  margin: var(--spacing-sm) 0;
}

.start-positions-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.start-pos-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: center;
}

.start-pos-item input {
  width: 50px;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-secondary);
  background: var(--bg-elevated);
  color: var(--text-primary);
  text-align: center;
}

.matrix-grid {
  display: grid;
  gap: 4px;
  overflow-x: auto;
}

.matrix-row {
  display: flex;
  gap: 4px;
  align-items: center;
}

.matrix-label {
  width: 65px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: right;
  padding-right: 0.5rem;
}

.matrix-header {
  width: 55px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.matrix-cell {
  width: 55px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-secondary);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s ease;
}

.matrix-cell:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--text-gold);
}

.matrix-cell:active:not(:disabled) {
  background: #555;
}

.matrix-cell:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  border-color: transparent;
}

/* --- SOLVER OUTPUT --- */
.c-err { color: #ff5c5c; font-weight: bold; }
.c-ok { color: #5cff8a; font-weight: bold; font-size: 1.1rem; margin-bottom: 1rem; }
.c-steps { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.5rem; }
.c-step { 
  background: var(--bg-card); 
  padding: 0.6rem 0.8rem; 
  border-left: 3px solid var(--text-gold); 
  border-radius: var(--radius-sm); 
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.c-action { font-size: 1.1rem; color: var(--text-primary); }
.c-num { color: var(--text-gold); margin-right: 0.5rem; font-weight: bold;}
.c-r { color: #5cff8a; font-weight: bold; }
.c-l { color: #ff5c5c; font-weight: bold; }
.c-state-row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.c-state { font-family: monospace; font-size: 1rem; letter-spacing: 2px; color: var(--text-secondary); }
.c-tgt { color: var(--text-gold); }
.c-eff { font-size: 0.85rem; color: #888; font-style: italic; text-align: right; }
.c-dim { opacity: 0.5; }

.config-panel {
    display: grid;
    gap: var(--spacing-md);
}

.config-controls {
    display: grid;
    grid-template-columns: auto auto auto 130px;
    align-items: center;
    gap: var(--spacing-sm);
}

#maxVisitedInput {
    width: 100%;
    padding: 0.45rem 0.55rem;
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.checkbox-wrap {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    white-space: nowrap;
}

.checkbox-wrap input {
    width: 16px;
    height: 16px;
    accent-color: #b38f4c;
}

.config-input {
    width: 100%;
    min-height: 260px;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-secondary);
    background: #1a1a1a;
    color: var(--text-white);
    resize: vertical;
    line-height: 1.35;
    font-size: 0.8rem;
}

.solver-output {
    margin: 0;
    min-height: 120px;
    max-height: 300px;
    overflow: auto;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.45;
    white-space: pre-wrap;
}

.table-wrap {
    overflow-x: auto;
}

.coupling-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

.coupling-table th,
.coupling-table td {
    border: 1px solid var(--border-primary);
    padding: 0.35rem 0.45rem;
    text-align: center;
}

.coupling-table th {
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.24);
}

.coupling-table td.impact-positive {
    color: var(--text-success);
}

.coupling-table td.impact-negative {
    color: var(--text-danger);
}

.action-log {
    margin: 0;
    padding-left: 1rem;
    display: grid;
    gap: var(--spacing-xs);
    max-height: 250px;
    overflow-y: auto;
}

.action-log li {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.action-log li.win {
    color: var(--text-success);
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 960px) {
    .toolbar {
        grid-template-columns: 1fr;
        align-items: stretch;
    }

    .stats {
        justify-content: flex-start;
    }

    .panel-duo {
        grid-template-columns: 1fr;
    }

    .config-controls {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    body {
        padding: var(--spacing-sm);
    }

    .panel {
        padding: var(--spacing-md);
    }

    .panel::after {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }

    .cassette-row {
        grid-template-columns: 66px 1fr auto auto;
    }

    .cassette-name {
        font-size: 0.74rem;
    }

    .control-btn {
        min-width: 30px;
        height: 30px;
    }
}