/* ============================================================
   Running Track Calculator — Frontend Styles
   ============================================================ */

/* CSS custom properties (set dynamically by JS from admin settings) */
#rtc-wrapper {
    --rtc-primary:    #00e676;
    --rtc-bg:         #1a1a2e;
    --rtc-text:       #ffffff;
    --rtc-bg-panel:   rgba(255, 255, 255, 0.05);
    --rtc-border:     rgba(255, 255, 255, 0.12);
    --rtc-radius:     10px;
    --rtc-transition: 0.2s ease;
}

/* ─── Wrapper ──────────────────────────────────────────────── */
.rtc-wrapper {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    width: 100%;
    min-height: 400px;
    background: var(--rtc-bg);
    color: var(--rtc-text);
    border-radius: var(--rtc-radius);
    overflow: hidden;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

/* ─── Calculator (left pane) ───────────────────────────────── */
.rtc-calculator {
    flex: 1 1 0;
    min-width: 0;
    padding: 28px 30px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    border-right: 1px solid var(--rtc-border);
    box-sizing: border-box;
}

.rtc-title {
    margin: 0 0 4px;
    font-size: 1.2em;
    font-weight: 700;
    color: var(--rtc-primary);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* ─── Mode toggle ──────────────────────────────────────────── */
.rtc-mode-toggle {
    display: flex;
    gap: 0;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--rtc-border);
}

.rtc-mode-btn {
    flex: 1;
    padding: 9px 12px;
    background: transparent;
    color: var(--rtc-text);
    border: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: background var(--rtc-transition), color var(--rtc-transition);
    opacity: 0.6;
}

.rtc-mode-btn:hover {
    background: rgba(255,255,255,0.08);
    opacity: 0.85;
}

.rtc-mode-btn.rtc-active {
    background: var(--rtc-primary);
    color: #000;
    opacity: 1;
}

/* ─── Fields ───────────────────────────────────────────────── */
.rtc-field {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.rtc-field label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.7;
    color: var(--rtc-text);
}

.rtc-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--rtc-bg-panel);
    border: 1px solid var(--rtc-border);
    border-radius: 6px;
    color: var(--rtc-text);
    font-size: 16px;
    font-weight: 500;
    box-sizing: border-box;
    transition: border-color var(--rtc-transition), box-shadow var(--rtc-transition);
    outline: none;
    -moz-appearance: textfield;
}

.rtc-input::-webkit-outer-spin-button,
.rtc-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.rtc-input:focus {
    border-color: var(--rtc-primary);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--rtc-primary) 25%, transparent);
}

/* ─── Lane selector ────────────────────────────────────────── */
.rtc-lane-row {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.rtc-lane-row label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.7;
    color: var(--rtc-text);
}

.rtc-lane-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.rtc-lane-controls .rtc-select {
    flex: 1;
    min-width: 0;
}

.rtc-lane-dist {
    font-size: 12px;
    font-weight: 600;
    color: var(--rtc-primary);
    white-space: nowrap;
    opacity: 0.9;
}

/* ─── Presets ──────────────────────────────────────────────── */
.rtc-presets {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.rtc-preset-btn {
    padding: 5px 11px;
    background: transparent;
    color: var(--rtc-text);
    border: 1px solid var(--rtc-border);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    opacity: 0.65;
    transition: all var(--rtc-transition);
}

.rtc-preset-btn:hover,
.rtc-preset-btn.rtc-preset-active {
    border-color: var(--rtc-primary);
    color: var(--rtc-primary);
    opacity: 1;
    background: color-mix(in srgb, var(--rtc-primary) 12%, transparent);
}

/* ─── Distance row ─────────────────────────────────────────── */
.rtc-distance-row {
    display: flex;
    gap: 8px;
}

.rtc-distance-row .rtc-input {
    flex: 1;
}

.rtc-select {
    padding: 10px 10px;
    background: var(--rtc-bg-panel);
    border: 1px solid var(--rtc-border);
    border-radius: 6px;
    color: var(--rtc-text);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    min-width: 68px;
}

.rtc-select:focus {
    border-color: var(--rtc-primary);
}

/* ─── Calculate button ─────────────────────────────────────── */
.rtc-btn {
    padding: 12px 20px;
    background: var(--rtc-primary);
    color: #000;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: opacity var(--rtc-transition), transform var(--rtc-transition);
    align-self: stretch;
}

.rtc-btn:hover {
    opacity: 0.88;
    transform: translateY(-1px);
}

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

/* ─── Result ───────────────────────────────────────────────── */
.rtc-result {
    background: var(--rtc-bg-panel);
    border: 1px solid var(--rtc-border);
    border-radius: 8px;
    padding: 14px 16px;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.rtc-result.rtc-hidden {
    display: none;
}

.rtc-result.rtc-show {
    display: block;
    animation: rtcFadeIn 0.3s ease forwards;
}

.rtc-result.rtc-error {
    border-color: #ff5252;
    color: #ff5252;
}

.rtc-result-inner {
    font-size: 14px;
    line-height: 1.7;
    color: var(--rtc-text);
}

.rtc-result-inner strong {
    color: var(--rtc-primary);
    font-size: 1.25em;
}

.rtc-result-sub {
    display: block;
    opacity: 0.6;
    font-size: 12px;
    margin-top: 2px;
}

/* ─── Track container (right pane) ────────────────────────── */
.rtc-track-container {
    flex: 0 0 45%;
    max-width: 45%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
    background: color-mix(in srgb, var(--rtc-bg) 85%, #000);
}

#rtc-track-svg {
    width: 100%;
    max-width: 340px;
    height: auto;
    display: block;
    /* Subtle slope: slight perspective tilt so top looks farther away */
    transform: perspective(400px) rotateX(18deg);
    transform-origin: center center;
}

.rtc-track-label {
    margin: 10px 0 0;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    opacity: 0.35;
    color: var(--rtc-text);
}

/* ─── Utility ──────────────────────────────────────────────── */
.rtc-hidden {
    display: none !important;
}

/* ─── Animation ────────────────────────────────────────────── */
@keyframes rtcFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
    .rtc-wrapper {
        flex-direction: column;
        min-height: auto;
    }

    .rtc-track-container {
        flex: none;
        max-width: 100%;
        width: 100%;
        padding: 20px 20px 24px;
        border-top: 1px solid var(--rtc-border);
    }

    .rtc-calculator {
        border-right: none;
    }
}