/* ==========================================================================
   Speed Post Charges Calculator — design tokens
   ========================================================================== */
:root {
    --od-primary: #ff1716;
    --od-primary-dark: #cc0000;
    --od-primary-light: #fff0ef;
    --od-shadow: rgba(255, 23, 22, 0.25);

    --od-ink: #1c1c1e;
    --od-ink-soft: #5c5c62;
    --od-border: #e6e6ea;
    --od-surface: #ffffff;
    --od-surface-muted: #fafafa;

    --od-radius-lg: 16px;
    --od-radius-md: 10px;
    --od-radius-pill: 999px;

    --od-space-1: 6px;
    --od-space-2: 10px;
    --od-space-3: 16px;
    --od-space-4: 24px;
    --od-space-5: 32px;

    --od-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.od-spc-wrapper {
    max-width: 640px;
    margin: 30px auto;
    font-family: var(--od-font);
    color: var(--od-ink);
    box-sizing: border-box;
    padding: 0 var(--od-space-3);
}

.od-spc-wrapper *,
.od-spc-wrapper *::before,
.od-spc-wrapper *::after {
    box-sizing: border-box;
}

.od-spc-header {
    text-align: center;
    margin-bottom: var(--od-space-4);
}

.od-spc-title {
    margin: 0 0 4px;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--od-ink);
}

.od-spc-subtitle {
    margin: 0;
    color: var(--od-ink-soft);
    font-size: 14px;
}

/* ==========================================================================
   Toggle
   ========================================================================== */
.od-spc-toggle-wrapper {
    position: relative;
    display: flex;
    background: #f1f1f3;
    border-radius: var(--od-radius-pill);
    padding: 5px;
    margin-bottom: var(--od-space-4);
}

.od-spc-toggle-indicator {
    position: absolute;
    top: 5px;
    left: 0;
    bottom: 5px;
    background: var(--od-primary);
    border-radius: var(--od-radius-pill);
    box-shadow: 0 2px 10px var(--od-shadow);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), width 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

.od-spc-toggle-btn {
    position: relative;
    z-index: 1;
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: var(--od-radius-pill);
    cursor: pointer;
    font-weight: 700;
    font-size: 14px;
    background: transparent;
    color: var(--od-ink-soft);
    transition: color 0.2s ease;
    white-space: nowrap;
}

.od-spc-toggle-btn.active {
    color: #fff;
}

.od-spc-toggle-btn:not(.active):hover {
    color: var(--od-ink);
}

/* ==========================================================================
   Form
   ========================================================================== */
.od-spc-form {
    background: var(--od-surface);
    padding: var(--od-space-4);
    border-radius: var(--od-radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--od-border);
}

.od-spc-grid {
    display: grid;
    gap: var(--od-space-3);
}

.od-spc-grid-2 {
    grid-template-columns: 1fr 1fr;
}

.od-spc-grid + .od-spc-grid {
    margin-top: var(--od-space-3);
}

.od-spc-field {
    display: flex;
    flex-direction: column;
}

.od-spc-label {
    font-weight: 600;
    font-size: 13px;
    color: var(--od-ink-soft);
    margin-bottom: var(--od-space-1);
}

.od-spc-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    font-family: var(--od-font);
    color: var(--od-ink);
    border: 1.5px solid var(--od-border);
    border-radius: var(--od-radius-md);
    background: var(--od-surface-muted);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.od-spc-input:focus {
    outline: none;
    border-color: var(--od-primary);
    background: var(--od-surface);
    box-shadow: 0 0 0 4px rgba(255, 23, 22, 0.12);
}

.od-spc-submit-row {
    margin-top: var(--od-space-4);
}

.od-spc-submit-btn {
    width: 100%;
    padding: 15px;
    background: var(--od-primary);
    color: #fff;
    border: none;
    border-radius: var(--od-radius-pill);
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 14px var(--od-shadow);
}

.od-spc-submit-btn:hover {
    background: var(--od-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--od-shadow);
}

.od-spc-submit-btn:active {
    transform: translateY(0);
}

.od-spc-submit-btn:disabled {
    opacity: 0.7;
    cursor: default;
    transform: none;
}

/* ==========================================================================
   Results
   ========================================================================== */
.od-spc-result {
    margin-top: var(--od-space-4);
    padding: var(--od-space-4);
    background: var(--od-surface-muted);
    border-radius: var(--od-radius-lg);
    border-left: 5px solid var(--od-primary);
    display: none;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.od-spc-result.is-visible {
    display: block;
    animation: od-spc-fade-in 0.25s ease forwards;
}

@keyframes od-spc-fade-in {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.od-spc-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--od-border);
    padding-bottom: var(--od-space-2);
    margin-bottom: var(--od-space-2);
}

.od-spc-result-title {
    font-weight: 700;
    color: var(--od-ink);
    font-size: 16px;
}

.od-spc-service-badge {
    background: var(--od-primary);
    color: #fff;
    padding: 4px 14px;
    border-radius: var(--od-radius-pill);
    font-size: 12px;
    font-weight: 700;
}

.od-spc-result-grid {
    row-gap: var(--od-space-2);
}

.od-spc-result-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 14px;
}

.od-spc-result-label {
    color: var(--od-ink-soft);
}

.od-spc-span-2 {
    grid-column: span 2;
}

.od-spc-total-box {
    background: var(--od-primary);
    color: #fff;
    padding: 14px;
    border-radius: var(--od-radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--od-space-2);
}

.od-spc-total-label {
    font-size: 14px;
}

.od-spc-total-amount {
    font-size: 22px;
    font-weight: 800;
}

.od-spc-disclaimer {
    font-size: 11px;
    line-height: 1.5;
    color: #9a9a9f;
    margin: var(--od-space-3) 0 0;
    text-align: center;
    border-top: 1px solid var(--od-border);
    padding-top: var(--od-space-2);
}

/* ==========================================================================
   Error
   ========================================================================== */
.od-spc-error {
    margin-top: var(--od-space-3);
    padding: 12px 14px;
    background: #fff3f3;
    border-radius: var(--od-radius-md);
    border: 1px solid #ffcccc;
    color: #d32f2f;
    font-size: 14px;
    display: none;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.od-spc-error.is-visible {
    display: block;
    opacity: 1;
}

/* ==========================================================================
   Mobile
   ========================================================================== */
@media (max-width: 600px) {
    .od-spc-wrapper {
        margin: 16px auto;
    }

    .od-spc-title {
        font-size: 20px;
    }

    .od-spc-form {
        padding: var(--od-space-3);
    }

    .od-spc-grid-2 {
        grid-template-columns: 1fr;
    }

    .od-spc-toggle-btn {
        font-size: 12.5px;
        padding: 11px 10px;
    }

    .od-spc-submit-btn {
        font-size: 16px;
        padding: 14px;
    }

    .od-spc-total-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .od-spc-total-amount {
        font-size: 24px;
    }

    /* Inputs at 16px+ prevent iOS Safari from auto-zooming on focus */
    .od-spc-input {
        font-size: 16px;
    }
}

@media (max-width: 380px) {
    .od-spc-toggle-btn {
        font-size: 11.5px;
        padding: 10px 6px;
    }
}