/* Scoped Styles for Alicia-style Advanced Calculator Suite */
.alicia-calc-suite {
    /* --- New Dark Blue-Gray Theme --- */
    --acs-bg-color: #2c3e50;
    --acs-panel-bg: #34495e;
    --acs-display-bg: #2c3e50;

    --acs-text-main: #ecf0f1;
    --acs-text-muted: #bdc3c7;

    /* Button Colors */
    --acs-btn-num-bg: #455a64;
    --acs-btn-sci-bg: #3e5060;
    --acs-btn-op-bg: #5dade2;
    --acs-btn-op-hover: #3498db;
    --acs-btn-clear-bg: #e67e22;
    --acs-btn-eq-bg: #e74c3c;

    /* Shadows & Borders */
    --acs-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    --acs-btn-shadow: 0 4px 0 rgba(0, 0, 0, 0.2);

    /* Fonts & Shapes */
    --acs-font-main: 'Inter', sans-serif;
    --acs-font-display: 'Outfit', sans-serif;
    --acs-border-radius: 20px;
    --acs-btn-radius: 12px;

    /* Base Layout Rules */
    font-family: var(--acs-font-main);
    background-color: var(--acs-panel-bg);
    color: var(--acs-text-main);

    /* Desktop Compactness */
    width: 100%;
    max-width: 400px;
    /* Reduced from 450px for compact feel */
    margin: 40px auto;
    padding: 20px;
    /* Tighter padding */

    box-sizing: border-box;
    box-shadow: var(--acs-shadow);
    border: 1px solid #2c3e50;
    border-radius: var(--acs-border-radius);

    /* Prevent layout shifts */
    position: relative;
    overflow: hidden;
}

/* Reset for internal elements */
.alicia-calc-suite *,
.alicia-calc-suite *::before,
.alicia-calc-suite *::after {
    box-sizing: inherit;
}

/* Header */
.alicia-calc-suite .acs-header {
    margin-bottom: 16px;
    /* Compact */
    text-align: center;
}

.alicia-calc-suite .acs-title {
    font-family: var(--acs-font-display);
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 0 12px 0;
    color: var(--acs-text-main);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Dropdown */
.alicia-calc-suite .acs-mode-selector-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.alicia-calc-suite .acs-dropdown {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95rem;
    color: var(--acs-text-main);
    background-color: var(--acs-display-bg);
    border: 1px solid #455a64;
    border-radius: var(--acs-btn-radius);
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    font-family: var(--acs-font-main);
    transition: all 0.2s;
}

.alicia-calc-suite .acs-dropdown option {
    background-color: var(--acs-display-bg);
    color: var(--acs-text-main);
    padding: 10px;
}

.alicia-calc-suite .acs-dropdown:hover {
    border-color: var(--acs-btn-op-bg);
    background-color: var(--acs-btn-sci-bg);
}

.alicia-calc-suite .acs-dropdown:focus {
    outline: none;
    border-color: var(--acs-btn-op-bg);
}

.alicia-calc-suite .acs-dropdown-arrow {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--acs-text-muted);
    font-size: 0.8rem;
}

/* Display Screen */
.alicia-calc-suite .acs-display-container {
    background-color: var(--acs-display-bg);
    padding: 16px;
    border-radius: 16px;
    text-align: right;
    margin-bottom: 16px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
    border: 1px solid #455a64;
    min-height: 80px;
}

.alicia-calc-suite .acs-expression {
    display: block;
    height: 1.2rem;
    color: var(--acs-text-muted);
    font-size: 0.85rem;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.alicia-calc-suite .acs-result {
    display: block;
    font-family: var(--acs-font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--acs-text-main);
    word-break: break-all;
    line-height: 1.2;
}

/* Modes Sections */
.alicia-calc-suite .acs-mode-section.hidden {
    display: none;
}

.alicia-calc-suite .acs-mode-section.active {
    display: block;
    animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

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

/* Toggles Row */
.alicia-calc-suite .acs-toggles-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
}

.alicia-calc-suite .acs-toggle-group {
    background: var(--acs-display-bg);
    border-radius: 8px;
    padding: 2px;
    display: flex;
    border: 1px solid #455a64;
}

.alicia-calc-suite .acs-toggle-btn {
    border: none;
    background: transparent;
    padding: 6px 12px;
    /* Nicer touch targets */
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--acs-text-muted);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.alicia-calc-suite .acs-toggle-btn.active {
    background: var(--acs-btn-sci-bg);
    color: var(--acs-text-main);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Keypad Grid */
.alicia-calc-suite .acs-keypad-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    /* Tighter gap */
}

.alicia-calc-suite .scientific-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

/* Buttons */
.alicia-calc-suite .acs-btn {
    appearance: none;
    border: none;
    padding: 0;
    /* Centered via Flexbox */
    height: 48px;
    /* Fixed compact height for desktop */
    font-size: 1rem;
    border-radius: var(--acs-btn-radius);
    cursor: pointer;
    transition: all 0.1s;
    box-shadow: var(--acs-btn-shadow);
    font-family: var(--acs-font-main);
    font-weight: 500;

    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.alicia-calc-suite .acs-btn:active {
    transform: translateY(2px);
    box-shadow: none;
}

/* Button Variants */
.alicia-calc-suite .acs-btn-num {
    background-color: var(--acs-btn-num-bg);
    color: var(--acs-text-main);
}

.alicia-calc-suite .acs-btn-num:hover {
    filter: brightness(1.1);
}

.alicia-calc-suite .acs-btn-sci {
    background-color: var(--acs-btn-sci-bg);
    color: var(--acs-text-main);
    font-size: 0.85rem;
}

.alicia-calc-suite .acs-btn-sci:hover {
    filter: brightness(1.1);
}

.alicia-calc-suite .acs-btn-op {
    background-color: var(--acs-btn-op-bg);
    color: #fff;
}

.alicia-calc-suite .acs-btn-op:hover {
    background-color: var(--acs-btn-op-hover);
}

.alicia-calc-suite .acs-btn-func[data-action="clear"],
.alicia-calc-suite .acs-btn-func[data-action="backspace"] {
    background-color: var(--acs-btn-clear-bg);
    color: #fff;
}

.alicia-calc-suite .acs-btn-action {
    background-color: var(--acs-btn-eq-bg);
    color: #fff;
    font-weight: 600;
}

.alicia-calc-suite .acs-btn-action:hover {
    filter: brightness(1.1);
}

/* Matrix UI */
.alicia-calc-suite .acs-matrix-ui {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alicia-calc-suite .acs-matrix-block {
    background: var(--acs-display-bg);
    padding: 10px;
    border-radius: 12px;
    border: 1px solid #455a64;
}

.alicia-calc-suite .acs-matrix-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--acs-text-muted);
}

.alicia-calc-suite .acs-matrix-grid {
    display: grid;
    gap: 4px;
    padding: 0 4px;
}

.alicia-calc-suite .acs-matrix-input {
    width: 100%;
    padding: 6px 0;
    text-align: center;
    border: 1px solid #455a64;
    border-radius: 6px;
    font-size: 0.9rem;
    background: var(--acs-panel-bg);
    color: var(--acs-text-main);
}

.alicia-calc-suite .acs-matrix-ops {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-top: 8px;
}

/* Solution Panel - Popup/Modal Style */
.alicia-calc-suite .acs-solution-panel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 20px 12px;
    overflow-y: auto;
}

.alicia-calc-suite .acs-solution-panel .acs-solution-inner {
    background-color: var(--acs-display-bg);
    border-radius: var(--acs-border-radius);
    border: 1px solid #455a64;
    padding: 14px;
    max-height: 100%;
    overflow-y: auto;
    color: var(--acs-text-main);
}

.alicia-calc-suite .acs-solution-panel.hidden {
    display: none;
}

.alicia-calc-suite .acs-solution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed #455a64;
    padding-bottom: 8px;
    margin-bottom: 8px;
}

.alicia-calc-suite .acs-solution-header h3 {
    font-size: 0.95rem;
    margin: 0;
    color: var(--acs-btn-op-bg);
}

.alicia-calc-suite .acs-solution-controls {
    display: flex;
    gap: 8px;
}

.alicia-calc-suite .acs-icon-btn {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--acs-text-muted);
    cursor: pointer;
    padding: 0 4px;
}

.alicia-calc-suite .acs-step {
    background: var(--acs-panel-bg);
    border-left: 3px solid var(--acs-btn-op-bg);
    padding: 8px;
    margin-bottom: 8px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.alicia-calc-suite .acs-step-text {
    display: block;
    margin-bottom: 4px;
    color: var(--acs-text-muted);
    font-size: 0.8rem;
}

.alicia-calc-suite .acs-vertical-math {
    font-family: monospace;
}

.alicia-calc-suite .acs-math-row {
    white-space: pre;
}

.alicia-calc-suite .acs-math-line {
    border-bottom: 1px solid var(--acs-text-main);
    margin: 2px 0;
}

/* --- RESPONSIVE RULES (MOBILE) --- */
@media (max-width: 768px) {
    .alicia-calc-suite {
        max-width: 100%;
        /* Full Width */
        margin: 0;
        border-radius: 0;
        border: none;
        box-shadow: none;
        padding: 12px;
    }

    /* Taller Buttons for Touch */
    .alicia-calc-suite .acs-btn {
        height: 60px;
        /* Touch target size increase */
        font-size: 1.2rem;
    }

    /* Scientific text slightly smaller to fit */
    .alicia-calc-suite .acs-btn-sci {
        font-size: 0.9rem;
    }

    /* Larger Result Text */
    .alicia-calc-suite .acs-result {
        font-size: 2.5rem;
    }

    /* Stack Matrix Operations */
    .alicia-calc-suite .acs-matrix-ops {
        grid-template-columns: 1fr;
    }

    /* Solution Panel fills entire calculator on mobile */
    .alicia-calc-suite .acs-solution-panel {
        padding: 12px 8px;
    }
}