/* Natywne zmienne zoptymalizowane pod kontrast i Dark Mode */
:root {
    --bg-base: #0a0a0a;
    --bg-surface: #171717;
    --bg-elevated: #262626;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --accent-color: #0d9488;
    --accent-hover: #0f766e;
    --danger-color: #ef4444;
    --border-color: #404040;
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 6px;
    --radius-md: 12px;
    --transition-speed: 0.15s;
    --touch-target: 48px; /* Standard dostępności WCAG 2.1 dla urządzeń dotykowych */
}

/* Hard reset i stabilizacja układu renderowania */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-stack);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 1rem;
    -webkit-font-smoothing: antialiased;
}

/* Klasy pomocnicze */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.hidden {
    display: none !important;
}

.active {
    display: block;
}

/* Kontener główny - Mobile First */
#app-container {
    width: 100%;
    max-width: 600px;
    margin-top: 1rem;
}

/* Panele i Moduły bazowe */
.panel {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

.module {
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1rem;
    margin-bottom: 1.25rem;
}

/* Typografia nagłówków */
h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    text-align: center;
}

/* Elementy interaktywne */
input[type="password"],
input[type="number"] {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-speed);
    width: 100%;
    min-height: var(--touch-target);
}

input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color);
}

button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    min-height: var(--touch-target);
    transition: background-color var(--transition-speed), transform 0.1s, opacity 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
}

button:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

button:active:not(:disabled) {
    transform: scale(0.98);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: #333;
}

/* Mechanika UI oparta na ukrytych detalach (Accordion) */
.pin-management-details {
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
    transition: border-color var(--transition-speed);
}

.pin-management-details[open] {
    border-color: var(--border-color);
    background-color: var(--bg-elevated);
    border-radius: var(--radius-sm);
    padding: 1rem;
}

.pin-management-details summary {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
    user-select: none;
    list-style-position: inside;
    transition: color var(--transition-speed);
}

.pin-management-details summary:hover {
    color: var(--text-primary);
}

.pin-management-content {
    margin-top: 1rem;
}

/* Elastyczne formularze i układy liniowe */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Moduł czasu wyjściowego */
.time-module {
    text-align: center;
    background-color: var(--bg-elevated);
    border-color: var(--accent-hover);
}

.current-time-display {
    font-size: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.current-time-display .label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.current-time-display strong {
    color: var(--accent-color);
    font-size: 1.75rem;
    line-height: 1.2;
}

/* Komunikaty systemowe */
.error-msg {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    text-align: center;
    min-height: 1.5em;
}

.sys-msg {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    text-align: center;
    min-height: 1.5em;
}

/* Lista Harmonogramu - Zoptymalizowana na Mobile First */
.schedule-section {
    margin-top: 1.25rem;
}

.schedule-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.schedule-item {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.schedule-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
}

.schedule-day {
    font-weight: 600;
    color: var(--text-primary);
}

.schedule-limit {
    color: var(--accent-color);
    font-family: monospace;
    font-size: 1.1rem;
}

.schedule-actions {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
}

/* Przyciski operacyjne plus/minus */
.btn-icon {
    flex: 1;
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1;
    padding: 0;
    border-radius: var(--radius-sm);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-icon:hover:not(:disabled) {
    background-color: var(--border-color);
}

.btn-icon.decrement {
    color: var(--danger-color);
}

.btn-icon.increment {
    color: var(--accent-color);
}

/* Płynne skalowanie dla większych ekranów (Tablety i Desktop) */
@media (min-width: 500px) {
    body {
        padding: 2rem;
    }

    .panel {
        padding: 2.5rem 2rem;
    }

    .input-group {
        flex-direction: row;
    }

    .input-group input {
        flex: 1;
    }

    .input-group button {
        flex: 0 0 auto;
        min-width: 120px;
    }
    
    .current-time-display {
        flex-direction: row;
        justify-content: center;
        gap: 0.75rem;
        align-items: baseline;
    }

    .schedule-item {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 1.25rem;
    }

    .schedule-info {
        flex: 1;
        justify-content: flex-start;
        gap: 1.5rem;
    }

    .schedule-actions {
        flex: 0 0 auto;
        width: 140px;
    }
}