/* Moderní a prémiový design pro simulátor atomových orbitalů */

:root {
    --bg-dark: #0b0e14;
    --bg-card: rgba(17, 24, 39, 0.65);
    --bg-card-border: rgba(255, 255, 255, 0.08);
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    
    --color-pos: #ff5722;
    --color-pos-glow: rgba(255, 87, 34, 0.35);
    --color-neg: #00bcd4;
    --color-neg-glow: rgba(0, 188, 212, 0.35);
    
    --accent: #6366f1; /* Indigo */
    --accent-glow: rgba(99, 102, 241, 0.4);
    --accent-hover: #4f46e5;
    
    --border-radius: 16px;
    --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body.light-mode {
    --bg-dark: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-card-border: rgba(15, 23, 42, 0.08);
    --text-main: #0f172a;
    --text-muted: #475569;
    
    --color-pos: #e64a19;
    --color-pos-glow: rgba(230, 74, 25, 0.15);
    --color-neg: #0097a7;
    --color-neg-glow: rgba(0, 151, 167, 0.15);
    
    --accent: #4f46e5;
    --accent-glow: rgba(79, 70, 229, 0.15);
    --accent-hover: #3730a3;
}

body.light-mode .btn-preset {
    background: rgba(15, 23, 42, 0.03);
    border-color: rgba(15, 23, 42, 0.06);
    color: var(--text-main);
}

body.light-mode .btn-preset:hover {
    background: rgba(15, 23, 42, 0.07);
}

body.light-mode .quantum-select-wrapper {
    background: rgba(15, 23, 42, 0.02);
}

body.light-mode .stat-card {
    background: rgba(15, 23, 42, 0.02);
}

body.light-mode .select-small {
    background: rgba(15, 23, 42, 0.04);
    color: var(--text-main);
}

body.light-mode .select-small option {
    background-color: #fff;
    color: #000;
}

body.light-mode .quantum-value-select option {
    background-color: #fff;
    color: #000;
}

body.light-mode .auto-generate-box {
    background: rgba(15, 23, 42, 0.01);
}

body.light-mode .help-overlay b {
    color: var(--text-main);
}

body.light-mode .canvas-overlay {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

body.light-mode .canvas-overlay .overlay-item span {
    color: var(--text-main);
}

body.light-mode #sidebar {
    background: #ffffff;
    border-right: 1px solid var(--bg-card-border);
    scrollbar-color: rgba(0, 0, 0, 0.15) transparent;
}

body.light-mode .sidebar-section h2 {
    color: var(--text-main);
}

body.light-mode .quantum-value-select {
    color: var(--text-main);
}

body.light-mode .stat-value {
    color: var(--text-main);
}

body.light-mode .node-list b {
    color: var(--text-main);
}

body.light-mode .math-box {
    background: rgba(79, 70, 229, 0.04);
    border-color: rgba(79, 70, 229, 0.2);
    color: var(--text-main);
}

body.light-mode .btn-secondary {
    background: rgba(15, 23, 42, 0.05);
    border-color: rgba(15, 23, 42, 0.1);
    color: var(--text-main);
}

body.light-mode .btn-secondary:hover {
    background: rgba(15, 23, 42, 0.09);
}

body.light-mode .btn-danger {
    background: rgba(220, 38, 38, 0.08);
    border-color: rgba(220, 38, 38, 0.25);
    color: #dc2626;
}

body.light-mode .btn-danger:hover {
    background: rgba(220, 38, 38, 0.15);
}

body.light-mode .range-slider {
    background: rgba(15, 23, 42, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Hlavní rozvržení */
header {
    background: rgba(11, 14, 20, 0.8);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--bg-card-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

header h1 span {
    font-size: 0.8rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.2rem 0.5rem;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 6px;
    color: #a5b4fc;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

main {
    flex: 1;
    display: flex;
    position: relative;
    height: calc(100vh - 70px);
}

/* 3D plátno přes celou obrazovku */
#canvas-container {
    flex: 1;
    position: relative;
    height: 100%;
}

/* Postranní panel (Sidebar) */
#sidebar {
    width: 450px;
    height: 100%;
    background: rgba(11, 14, 20, 0.75);
    backdrop-filter: blur(16px);
    border-right: 1px solid var(--bg-card-border);
    display: flex;
    flex-direction: column;
    z-index: 5;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.sidebar-section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--bg-card-border);
}

.sidebar-section h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #fff;
}

/* Skupiny ovládacích prvků */
.control-group {
    margin-bottom: 1rem;
}

.control-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Selektory kvantových čísel */
.quantum-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.quantum-select-wrapper {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--bg-card-border);
    border-radius: 10px;
    padding: 0.5rem;
    text-align: center;
}

.quantum-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.quantum-value-select {
    width: 100%;
    background: transparent;
    color: #fff;
    border: none;
    outline: none;
    font-size: 1.2rem;
    font-weight: 700;
    text-align-last: center;
    cursor: pointer;
}

.quantum-value-select option {
    background-color: #0f172a;
    color: #fff;
}

/* Přednastavené orbitaly */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-preset {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    color: var(--text-main);
    padding: 0.4rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn-preset:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-preset.active {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent);
    color: #a5b4fc;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Tlačítka pro simulaci */
.simulation-actions {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 12px var(--accent-glow);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: none;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #fca5a5;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.35);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

/* Automatické generování */
.auto-generate-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: 1rem;
}

.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .3s;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.range-slider {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    transition: transform 0.1s;
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Sekce statistik a stavu */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--bg-card-border);
    border-radius: 10px;
    padding: 0.75rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-top: 0.25rem;
}

.stat-value span {
    font-size: 0.85rem;
    font-weight: 400;
    margin-left: 0.25rem;
}

.phase-indicator {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.8rem;
}

.phase-pill {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(255, 255, 255, 0.04);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.dot-pos {
    width: 8px;
    height: 8px;
    background-color: var(--color-pos);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-pos-glow);
}

.dot-neg {
    width: 8px;
    height: 8px;
    background-color: var(--color-neg);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-neg-glow);
}

/* 2D řez a teorie */
.slice-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

#slice-canvas {
    background-color: #000;
    border-radius: 12px;
    border: 1px solid var(--bg-card-border);
    width: 180px;
    height: 180px;
    image-rendering: pixelated;
}

.slice-controls {
    width: 100%;
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
}

.select-small {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border: 1px solid var(--bg-card-border);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    outline: none;
    cursor: pointer;
}

.select-small option {
    background-color: #0f172a;
}

/* Teorie a rovnice */
.math-box {
    background: rgba(99, 102, 241, 0.03);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 0.5rem;
    overflow-x: auto;
    font-size: 0.9rem;
    color: #c7d2fe;
    text-align: center;
}

.theory-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.theory-text p {
    margin-bottom: 0.5rem;
}

.node-list {
    margin-top: 0.5rem;
    padding-left: 1.25rem;
    font-size: 0.8rem;
}

.node-list li {
    margin-bottom: 0.25rem;
}

.node-list b {
    color: #fff;
}

/* Vizualizační překryvné prvky na plátně */
.canvas-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(11, 14, 20, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 4;
}

.overlay-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.overlay-item span {
    font-weight: 500;
    color: #fff;
}

.color-dot-legend {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    vertical-align: middle;
    margin-right: 0.25rem;
}

.color-dot-legend.pos { background-color: var(--color-pos); box-shadow: 0 0 6px var(--color-pos-glow); }
.color-dot-legend.neg { background-color: var(--color-neg); box-shadow: 0 0 6px var(--color-neg-glow); }

/* Spodní panel / Návod */
.help-overlay {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(11, 14, 20, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid var(--bg-card-border);
    border-radius: 30px;
    padding: 0.5rem 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 1.5rem;
    pointer-events: none;
    z-index: 4;
    transition: opacity 0.3s;
}

.help-overlay span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.help-overlay b {
    color: #fff;
}

/* Skrytí scrollbaru u sidebar */
#sidebar::-webkit-scrollbar {
    width: 6px;
}
#sidebar::-webkit-scrollbar-track {
    background: transparent;
}
#sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}
#sidebar::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Výchozí styl pro responsivní řádek (2 sloupce na desktopu) */
.responsive-row-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    align-items: start;
}

/* Responsivita */
@media (max-width: 900px) {
    main {
        flex-direction: column-reverse;
        overflow: auto;
    }
    
    #sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-top: 1px solid var(--bg-card-border);
    }
    
    #canvas-container {
        height: 50vh;
        min-height: 350px;
    }
    
    .help-overlay {
        display: none;
    }
    
    .preset-grid {
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    }
}

@media (max-width: 600px) {
    header {
        padding: 0.75rem 1rem;
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
    
    header h1 {
        font-size: 1.25rem;
        justify-content: center;
    }
    
    .subtitle {
        font-size: 0.75rem;
    }
    
    .header-buttons {
        width: 100%;
        display: flex;
        gap: 0.5rem;
    }
    
    .header-buttons button {
        flex: 1;
    }
    
    .responsive-row-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .slice-container {
        width: 100%;
        align-items: center;
    }
    
    .stats-grid {
        width: 100%;
    }
    
    .quantum-grid {
        gap: 0.5rem;
    }
    
    .quantum-select-wrapper {
        padding: 0.4rem;
    }
    
    .quantum-value-select {
        font-size: 1rem;
    }
}

/* Interaktivita pro 2D řez */
#slice-canvas {
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#slice-canvas:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Modal pro zvětšení 2D řezu */
.modal {
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(11, 14, 20, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.open {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    position: relative;
    max-width: 90%;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.open .modal-content {
    transform: scale(1);
}

body.light-mode .modal {
    background-color: rgba(248, 250, 252, 0.85);
}

body.light-mode .modal-content {
    background: #ffffff;
    box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.1);
}

.modal-close {
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-main);
}

#modal-slice-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* Footer v sidebaru */
.sidebar-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--bg-card-border);
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

.sidebar-footer p {
    margin: 0.25rem 0;
}

.sidebar-footer a {
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 500;
    transition: color 0.2s;
}

.sidebar-footer a:hover {
    color: var(--accent-hover);
}

.sidebar-footer .github-icon {
    vertical-align: middle;
}

/* --- Styly pro režim Molekulových orbitalů (LCAO) --- */

.mode-tabs {
    display: flex;
    padding: 0.5rem 1.5rem 0 1.5rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--bg-card-border);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.75rem 0.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Karta atomu v molekulovém režimu */
.atom-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
}

body.light-mode .atom-card {
    background: rgba(15, 23, 42, 0.02);
    border-color: rgba(15, 23, 42, 0.06);
}

.atom-card-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

/* Dvou-sloupcový grid pro nastavení kombinace */
.combination-select-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.btn-group-toggle {
    display: flex;
    gap: 0.5rem;
}

.btn-toggle {
    flex: 1;
    padding: 0.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.btn-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main);
}

.btn-toggle.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 12px var(--accent-glow);
}

body.light-mode .btn-toggle {
    background: rgba(15, 23, 42, 0.03);
    border-color: rgba(15, 23, 42, 0.08);
    color: var(--text-muted);
}

body.light-mode .btn-toggle:hover {
    background: rgba(15, 23, 42, 0.06);
}

body.light-mode .btn-toggle.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Skrytí/Zobrazení podle režimu */
body.mode-molecular .atomic-only {
    display: none !important;
}

body.mode-atomic .molecular-only {
    display: none !important;
}