/* ========================================================
   ChemCalc — Styles
   ======================================================== */

.app-header {
    padding: 32px 0 20px;
    margin-bottom: 24px;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    width: 100%;
    margin-bottom: 60px;
}

.calc-card {
    display: flex;
    flex-direction: column;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex: 1;
}

/* For continuous inputs like grids */
.mass-grid, .temp-grid {
    gap: 16px;
}

.volume-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
}

@media (min-width: 800px) {
    .temp-grid {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.control-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.text-input {
    width: 100%;
    /* Accent glow specifically for valid inputs when focused */
}
.text-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px var(--accent-green-dim);
}
.text-input.invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px var(--danger-bg);
}

.result-box {
    margin-top: auto;
    padding: 16px;
    background: rgba(16, 185, 129, 0.08); /* slight green dim */
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.result-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-green);
    word-break: break-all;
}

/* Remove default number arrows */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none; 
    margin: 0; 
}
input[type=number] {
    -moz-appearance: textfield;
}

@media (max-width: 1180px) {
    .calc-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .calc-grid,
    .volume-grid,
    .temp-grid {
        grid-template-columns: 1fr;
    }
}

[data-theme="light"] :is(.text-input, input, textarea, select) {
    background: #ffffff;
    border-color: #d7dee8;
    color: #111827;
}

[data-theme="light"] :is(.text-input, input, textarea, select)::placeholder { color: #64748b; }

[data-theme="light"] :is(.text-input, input, textarea, select):focus,
.text-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

[data-theme="light"] :is(.chip, .btn-ghost, .back-link) {
    background: #ffffff;
    border-color: #d7dee8;
    color: #334155;
}

[data-theme="light"] .card-title { color: #1f2937; }