/* static/css/calculator.css */

/**
 * =====================================================================
 * KALKULAČKA (PiP OKNO) - VERZE 2.0
 * =====================================================================
 */

.calculator-pip-container {
    position: fixed;
    bottom: 20px;
    right: 280px;
    width: 340px;
    /* Mírně širší pro pohodlí */
    height: auto;
    background-color: var(--c-bg-container, #ffffff);
    border: 1px solid var(--c-border, #dee2e6);
    border-radius: 16px;
    /* Modernější zaoblení */
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
    z-index: 1048;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 320px;
    min-height: 500px;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    user-select: none;
    outline: none;
    /* Backdrop filter pro moderní skleněný efekt (pokud podporováno) */
    backdrop-filter: blur(10px);
}

/* Tmavý režim - pokud používáš class na body */
body.dark-mode .calculator-pip-container {
    background-color: var(--c-bg-container, #212529);
    border-color: #495057;
}

.calculator-pip-container:focus-within {
    border-color: var(--c-primary, #0d6efd);
    box-shadow: 0 12px 40px rgba(13, 110, 253, 0.25);
}

/* --- HLAVIČKA --- */
.calculator-pip-header {
    flex-shrink: 0;
    padding: 10px 16px;
    background-color: var(--c-bg-subtle, #f8f9fa);
    border-bottom: 1px solid var(--c-border, #dee2e6);
    cursor: move;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

body.dark-mode .calculator-pip-header {
    background-color: #343a40;
}

.calculator-pip-header .title {
    font-weight: 600;
    color: var(--c-text, #212529);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-controls {
    display: flex;
    gap: 6px;
}

.pip-control-btn {
    background: transparent;
    border: none;
    color: var(--c-text-muted, #6c757d);
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.pip-control-btn:hover,
.pip-control-btn.active {
    background-color: var(--c-border, #e9ecef);
    color: var(--c-text, #212529);
}

.pip-control-btn.close-btn:hover {
    background-color: #dc3545;
    color: white;
}

.pip-control-btn.copy-btn.copied {
    background-color: #198754 !important;
    color: white !important;
}

/* --- HISTORIE --- */
.calculator-history-panel {
    background-color: var(--c-bg-subtle, #f8f9fa);
    border-bottom: 1px solid var(--c-border, #dee2e6);
    height: 160px;
    display: flex;
    flex-direction: column;
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        height: 0;
        opacity: 0;
    }

    to {
        height: 160px;
        opacity: 1;
    }
}

.history-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px;
    font-size: 0.9rem;
}

.history-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 8px;
    cursor: pointer;
    border-radius: 4px;
    margin-bottom: 2px;
}

.history-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

body.dark-mode .history-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.history-expr {
    color: var(--c-text-muted, #6c757d);
}

.history-res {
    font-weight: 600;
    color: var(--c-text, #212529);
}

.history-empty {
    text-align: center;
    color: var(--c-text-muted, #6c757d);
    margin-top: 20px;
    font-style: italic;
}

.history-clear-btn {
    background: none;
    border: none;
    border-top: 1px solid var(--c-border, #dee2e6);
    padding: 6px;
    font-size: 0.8rem;
    color: var(--c-text-muted, #6c757d);
    cursor: pointer;
}

.history-clear-btn:hover {
    color: #dc3545;
}

/* --- DISPLEJ --- */
.calculator-pip-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: 16px;
}

.display-wrapper {
    position: relative;
    margin-bottom: 12px;
    background-color: rgba(0, 0, 0, 0.03);
    /* Jemné pozadí pod displejem */
    border-radius: 8px;
}

.memory-indicator {
    position: absolute;
    left: 12px;
    top: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--c-primary, #0d6efd);
    visibility: hidden;
}

.calculator-display {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--c-text, #212529);
    text-align: right;
    font-size: 2.8rem;
    font-weight: 300;
    padding: 16px 12px 8px 12px;
    height: 80px;
    box-sizing: border-box;
    outline: none;
    font-family: 'Inter', monospace;
    /* Monospace pro lepší zarovnání čísel */
    transition: font-size 0.1s;
}

body.dark-mode .calculator-display {
    color: #f8f9fa;
}

/* --- TLAČÍTKA --- */
.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(7, 1fr);
    /* Více řádků pro nové funkce */
    gap: 8px;
    flex-grow: 1;
}

.calc-btn {
    background-color: var(--c-bg-subtle, #f1f3f5);
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--c-text, #212529);
    cursor: pointer;
    transition: all 0.1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
}

body.dark-mode .calc-btn {
    background-color: #343a40;
    color: #e9ecef;
}

.calc-btn:hover {
    filter: brightness(0.95);
}

body.dark-mode .calc-btn:hover {
    filter: brightness(1.2);
}

.calc-btn:active,
.calc-btn.active {
    transform: scale(0.96);
}

/* Operátory */
.calc-btn.operator {
    background-color: var(--c-primary-subtle, #cfe2ff);
    color: var(--c-primary, #0d6efd);
    font-size: 1.5rem;
}

body.dark-mode .calc-btn.operator {
    background-color: #0d6efd;
    color: #fff;
}

/* Aktivní stav operátoru (po kliknutí) */
.calc-btn.operator.is-active-operator {
    border: 2px solid var(--c-primary, #0d6efd);
    font-weight: 700;
    background-color: #fff;
}

body.dark-mode .calc-btn.operator.is-active-operator {
    background-color: #fff;
    color: #0d6efd;
}

/* Tlačítko Rovná se */
.calc-btn.operator.equals {
    grid-row: span 2;
    background-color: var(--c-primary, #0d6efd);
    color: white;
    font-size: 1.8rem;
}

.calc-btn.operator.equals:hover {
    background-color: #0b5ed7;
}

/* Funkční tlačítka (AC, Del, %) */
.calc-btn.function {
    color: var(--c-danger, #dc3545);
    background-color: rgba(220, 53, 69, 0.1);
    font-size: 1.1rem;
    font-weight: 600;
}

body.dark-mode .calc-btn.function {
    background-color: rgba(220, 53, 69, 0.2);
}

/* Paměťová tlačítka - menší písmo */
.calc-btn.function.mem {
    color: var(--c-text-muted, #6c757d);
    background-color: transparent;
    font-size: 0.9rem;
    border: 1px solid var(--c-border, #dee2e6);
}

/* Sekundární funkce (Math) */
.calc-btn.secondary {
    font-size: 1rem;
    font-style: italic;
    background-color: var(--c-bg-container);
    border: 1px solid var(--c-border, #dee2e6);
}

.calc-btn.zero {
    grid-column: span 2;
    border-bottom-left-radius: 12px;
}

/* Resize Handle Style Override */
.calculator-pip-container .ui-resizable-se {
    width: 16px;
    height: 16px;
    bottom: 2px;
    right: 2px;
    background-image: none;
    /* Použijeme vlastní přes CSS border */
}

/* Stylový růžek pro resize */
.calculator-pip-container::after {
    content: '';
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    border-bottom: 2px solid var(--c-text-muted, #adb5bd);
    border-right: 2px solid var(--c-text-muted, #adb5bd);
    pointer-events: none;
}