/* Typography & Labels */
.label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
    opacity: 0.8;
    color: var(--text-label);
}

.input-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-top: 12px;
    margin-bottom: 0;
    opacity: 0.9;
}

.error-text {
    font-size: 13px;
    font-weight: 400;
    margin-top: 8px;
    display: none;
    color: var(--error-color);
}

.success-text {
    font-size: 13px;
    font-weight: 400;
    margin-top: 8px;
    color: var(--success-color);
    display: none;
    /* hidden by default */
}

/* Inputs & Form Elements */
.input-field,
.select-field,
.custom-dropdown-toggle {
    width: 100%;
    height: 52px;
    padding: 14px 16px;
    font-size: 16px;
    font-weight: 400;
    border-radius: 14px;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    font-family: 'Inter', sans-serif;
    outline: none;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-input);
    box-shadow: none;
}

.input-field:focus,
.select-field:focus,
.custom-dropdown-toggle:focus,
.custom-dropdown-toggle.open {
    background-color: var(--input-focus-bg);
    box-shadow: 0 0 0 3px var(--card-border);
}

.input-field::placeholder {
    color: var(--text-placeholder);
}

/* Webkit Autofill Override for Dark Mode consistency */
.input-field:-webkit-autofill,
.input-field:-webkit-autofill:hover,
.input-field:-webkit-autofill:focus,
.input-field:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 1000px var(--input-bg) inset !important;
    -webkit-text-fill-color: var(--text-input) !important;
    background-color: var(--input-bg) !important;
    color: var(--text-input) !important;
    border-color: var(--input-border) !important;
    transition: background-color 5000s ease-in-out 0s;
}

@media (prefers-color-scheme: dark) {
    .input-field:-webkit-autofill {
        -webkit-box-shadow: 0 0 0 1000px #2C2C2E inset !important;
    }
}


.input-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 12px;
}

.input-group {
    margin-bottom: 24px;
}

.hidden {
    display: none !important;
}

.calculator-body {
    animation: contentFade 0.3s ease-out;
}

@keyframes contentFade {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.original-select {
    display: none;
}

/* Buttons */
.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

.button-group .btn-primary {
    grid-column: 1 / -1;
}

.btn {
    padding: 16px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.01em;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
}

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

.btn-primary:active {
    transform: scale(0.98);
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s ease-in-out infinite;
    vertical-align: middle;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: 1px solid var(--btn-secondary-border);
}

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover-bg);
    border-color: var(--btn-secondary-hover-border);
}

.btn-secondary:active {
    transform: scale(0.98);
}

.btn-secondary:disabled {
    background-color: var(--input-bg);
    color: var(--text-secondary);
    border-color: var(--card-border);
}

/* Dropdowns */
.custom-dropdown {
    position: relative;
    width: 100%;
}

.custom-dropdown-toggle {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    white-space: nowrap;
    overflow: hidden;
}

.custom-dropdown-toggle:hover {
    background-color: var(--input-bg);
    /* Slightly redundant if input-bg is same, but kept for logic */
}

.custom-dropdown-toggle::after {
    content: "▼";
    font-size: 12px;
    transition: transform 0.2s ease;
    opacity: 0.6;
}

.custom-dropdown-toggle.open {
    background-color: var(--input-focus-bg);
    box-shadow: 0 0 0 3px var(--card-border);
    /* Subtle ring effect using card-border as a proxy for a neutral highlight */
}

.custom-dropdown-toggle.open::after {
    transform: rotate(180deg);
}

.custom-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    border-radius: 14px;
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
    display: none;
    margin-top: 8px;
    transform-origin: top center;
    animation: dropdownEnter 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);

    background-color: var(--dropdown-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--dropdown-border);
    box-shadow: 0 10px 25px -5px var(--dropdown-shadow), 0 8px 10px -6px var(--dropdown-shadow);
    padding: 4px;
}

.custom-dropdown-menu.show {
    display: block;
}

.custom-dropdown-item {
    padding: 14px 16px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 400;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
    color: var(--text-input);
    border-radius: 8px;
    /* Applied to all for consistency */
    margin-bottom: 2px;
    white-space: nowrap;
}

.custom-dropdown-item:hover,
.custom-dropdown-item.is-highlighted {
    background-color: var(--dropdown-item-hover);
    color: var(--text-input);
}

.custom-dropdown-item.selected {
    background-color: var(--dropdown-item-selected-bg);
    font-weight: 500;
    outline: none;
}

/* Unit Toggle */
.input-with-toggle {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-toggle .input-field {
    padding-right: 110px;
    /* Space for toggle */
}

.unit-toggle {
    position: absolute;
    right: 6px;
    top: 6px;
    bottom: 6px;
    background-color: var(--btn-secondary-border);
    /* Matches border color essentially */
    border-radius: 10px;
    display: flex;
    padding: 3px;
}

.toggle-btn {
    border: none;
    background: transparent;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    height: 100%;
    display: flex;
    align-items: center;
}

.toggle-btn.active {
    background-color: var(--bg-container);
    /* Usually white or dark grey */
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn:active,
.btn.active-shortcut {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

@keyframes dropdownEnter {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: translate(-50%, -40%) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}