/* ============================================================
   Seasonal Depression Dissection Solver — Indigo Night dark mode
   ============================================================ */

:root {
    --bg-1: #101124;          /* page background top */
    --bg-2: #0b0c18;          /* page background bottom */
    --panel: #181a30;         /* main container */
    --card: #121425;          /* inner cards */

    --accent-rgb: 140, 140, 255;
    --border: rgba(150, 150, 230, 0.14);
    --border-strong: rgba(var(--accent-rgb), 0.42);

    --accent: #8c8cff;        /* periwinkle-violet */
    --accent-bright: #a9a9ff;

    --text: #e8e9f7;
    --text-dim: #9a9bc0;
    --text-faint: #63648a;

    --btn-bg: rgba(var(--accent-rgb), 0.10);
    --btn-hover: rgba(var(--accent-rgb), 0.22);
    --btn-active: linear-gradient(180deg, rgba(var(--accent-rgb), 0.28), rgba(var(--accent-rgb), 0.10));

    --danger: #ef4767;
    --on-accent: #0d0e20;     /* text on accent-filled surfaces */

    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
    font-family: "Rajdhani", "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--text);
    margin: 0;
    padding: 32px 16px 64px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
    background-attachment: fixed;
}

/* ---------- Layout shell ---------- */
.container {
    width: 100%;
    max-width: 860px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 34px 30px 38px;
    text-align: center;
}

.app-header { margin-bottom: 28px; }

h1 {
    font-family: "Orbitron", "Rajdhani", sans-serif;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: clamp(1.5rem, 3.5vw, 2.3rem);
    margin: 0;
    color: var(--text);
}

h1 .accent { color: var(--accent); }

.subtitle {
    margin: 8px 0 0;
    color: var(--text-dim);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

h2 {
    font-family: "Orbitron", "Rajdhani", sans-serif;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-size: 0.95rem;
    color: var(--accent);
    margin: 0 0 14px;
}

.section-label {
    display: block;
    color: var(--text-dim);
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 20px;
    margin-bottom: 22px;
}

/* ---------- Callout input ---------- */
.callout-input {
    width: 100%;
    max-width: 320px;
    padding: 14px 16px;
    font-family: "Orbitron", monospace;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 8px;
    text-align: center;
    text-transform: uppercase;
    color: var(--text);
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.callout-input::placeholder {
    color: var(--text-faint);
    letter-spacing: 4px;
    font-size: 1rem;
}

.callout-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.22);
}

.callout-input.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 71, 103, 0.25);
}

.hint {
    color: var(--text-faint);
    font-size: 0.8rem;
    margin-top: 10px;
    letter-spacing: 0.5px;
}

/* ---------- Callout tap buttons ---------- */
.callout-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.callout-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--btn-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: transform 0.12s, background 0.15s, border-color 0.15s;
}

.callout-btn img {
    width: 18px;
    height: 18px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.85;
}

.callout-btn:hover {
    background: var(--btn-hover);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

.callout-btn.clear {
    background: transparent;
    color: var(--text-dim);
    border-color: var(--border);
}

.callout-btn.clear:hover {
    color: var(--danger);
    border-color: var(--danger);
    background: rgba(239, 71, 103, 0.08);
}

.statues-hint {
    margin: -6px 0 16px;
    color: var(--text-dim);
}

/* ---------- Callout shape preview ---------- */
#shapes-container {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-top: 18px;
    flex-wrap: wrap;
}

#shapes-container .shape-chip {
    width: 76px;
    height: 76px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 14px;
}

#shapes-container img {
    width: 46px;
    height: 46px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

/* ---------- Statue selectors ---------- */
.statues-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.statue {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 12px;
}

.statue > .section-label { margin-bottom: 12px; }

.button-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.shape-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 6px;
    background: var(--btn-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: transform 0.12s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.shape-btn .icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.shape-btn:hover {
    background: var(--btn-hover);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

.shape-btn.active {
    background: var(--btn-active);
    border-color: var(--accent);
    color: var(--accent-bright);
    box-shadow: 0 0 0 1px var(--accent), 0 0 22px rgba(var(--accent-rgb), 0.35);
}

.shape-btn.active .icon { opacity: 1; }

/* ---------- Targeted solution ---------- */
#target-solution-container {
    border: 1px solid var(--border-strong);
    background: var(--btn-bg);
}

#target-solution {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.target-solution-btn {
    padding: 10px 18px;
    background: var(--btn-bg);
    color: var(--accent-bright);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.85rem;
}

/* ---------- Submit ---------- */
.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    max-width: 360px;
    margin: 8px auto 30px;
    padding: 20px 44px;
    font-family: "Orbitron", sans-serif;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--on-accent);
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform 0.12s, box-shadow 0.15s, filter 0.15s;
    box-shadow: 0 8px 26px rgba(var(--accent-rgb), 0.28);
}

.submit-btn:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: 0 12px 32px rgba(var(--accent-rgb), 0.4); }
.submit-btn:active { transform: translateY(0); }

/* ---------- Solution output ---------- */
#solution-container {
    border: 1px solid var(--border-strong);
    background: var(--card);
    text-align: left;
    animation: rise 0.3s ease;
}

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

.solution-title {
    font-family: "Orbitron", sans-serif;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.9rem;
    color: var(--accent);
    text-align: center;
    margin-bottom: 16px;
}

.solution-steps { display: grid; gap: 10px; }

.solution-step {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: var(--btn-bg);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    line-height: 1.4;
}

.step-number {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--on-accent);
    font-family: "Orbitron", sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
}

.solution-step b { color: var(--accent-bright); font-weight: 700; }

.solution-empty {
    text-align: center;
    color: var(--text-dim);
    padding: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
    .container { padding: 26px 18px 30px; }
    .statues-grid { grid-template-columns: 1fr; gap: 14px; }
    .statue .button-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 440px) {
    body { padding: 16px 10px 44px; }
    .container { padding: 22px 14px 26px; border-radius: 14px; }
    .card { padding: 18px 14px; }
    .statue .button-grid { grid-template-columns: repeat(2, 1fr); }
    .callout-input { font-size: 1.25rem; letter-spacing: 6px; }
    .solution-step { font-size: 0.95rem; gap: 10px; padding: 11px 12px; }
}