/* lab.css - Stile scuro professionale per il Calcolatore Resistenze Lab */

:root {
    --bg-color: #0d0e12;
    --container-bg: #161821;
    --border-color: #26293b;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    
    /* Colori Bande Resistenze */
    --band-black: #000000;
    --band-brown: #8b5a2b;
    --band-red: #ff0000;
    --band-orange: #ff8c00;
    --band-yellow: #ffd700;
    --band-green: #008000;
    --band-blue: #0000ff;
    --band-violet: #8a2be2;
    --band-gray: #808080;
    --band-white: #ffffff;
    --band-gold: #ffd700;
    --band-silver: #c0c0c0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.lab-container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 16px;
}

.logo-section h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #3b82f6, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 4px;
}

.pi-badge {
    background-color: #c71585; /* Raspberry color */
    color: white;
    padding: 6px 12px;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1.6fr 1fr;
    }
}

/* Card layout */
.card {
    background-color: var(--container-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Resistor Visualizer */
.resistor-visual-box {
    background: radial-gradient(circle, #1e2235 0%, #0d0e12 100%);
    border-radius: 12px;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.resistor-body-svg {
    width: 100%;
    max-width: 400px;
    height: 120px;
}

/* Band Selections Grid */
.band-selectors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
}

.selector-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.selector-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

.color-select {
    background-color: #1c1e2a;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
    appearance: none;
    position: relative;
}

.color-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

/* Result Box */
.result-box {
    background: linear-gradient(135deg, #1d2d44 0%, #111e30 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 120px;
}

.result-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: #38bdf8;
    text-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.result-details {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 6px;
    letter-spacing: 0.05em;
}

/* Ohm's Law Calculator */
.ohms-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.input-field-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-field {
    width: 100%;
    background-color: #1c1e2a;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 36px 10px 12px;
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
}

.input-field:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
}

.input-unit {
    position: absolute;
    right: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    pointer-events: none;
}

.calc-btn-row {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    background-color: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn:hover {
    background-color: var(--accent-blue-hover);
}

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

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-green {
    background-color: var(--accent-green);
}

.btn-green:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: transparent;
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: var(--accent-red);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

/* History list */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 4px;
}

.history-list::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track {
    background: transparent;
}

.history-list::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 99px;
}

.history-item {
    background-color: #1c1e2a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.history-item:hover {
    background-color: #222637;
}

.history-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.history-val {
    font-weight: 700;
    color: #38bdf8;
}

.history-bands {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    gap: 4px;
    align-items: center;
}

.history-time {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.dot-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.2);
}

.empty-history {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
    font-style: italic;
}

/* Tabs or band layout chooser */
.tabs-container {
    display: flex;
    background-color: #12141c;
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.tab.active {
    background-color: var(--container-bg);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* Utilities */
.text-cyan { color: var(--accent-cyan); }
.text-green { color: var(--accent-green); }

/* Series / Parallel Calculator */
.calc-combo-row {
    display: flex;
    gap: 12px;
}

.combo-inputs-box {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.combo-resistor-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.resistor-chip {
    background-color: #1c1e2a;
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.resistor-chip span {
    font-weight: 600;
    color: #38bdf8;
}

.resistor-chip-remove {
    cursor: pointer;
    color: var(--accent-red);
    font-weight: bold;
    border: none;
    background: none;
}

/* Navigazione Dashboard */
.lab-nav {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    width: 100%;
}

.nav-item {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.2s ease-in-out;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    color: var(--accent-cyan);
    font-weight: 600;
    background-color: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.2);
}

/* Toast Notification Styles */
.toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: #ef4444;
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: monospace;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-notification.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.toast-notification.success {
    background-color: #10b981;
}

.toast-notification.info {
    background-color: #06b6d4;
}

.toast-notification i {
    font-size: 1rem;
}