/* === CSS-MUUTTUJAT (Tumma teema) === */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --bg-canvas: #2a2a3e;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --accent-light: #ff8a8a;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --text-muted: #6c6c7c;
    --border: #2a2a4a;
    --border-light: #3a3a5a;
    --success: #4ade80;
    --warning: #fbbf24;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

/* === PERUSASETTELU === */
* {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

#app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--bg-primary);
}

/* === TYÖKALUPALKIT === */
.toolbar {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 8px;
}

.toolbar button {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.toolbar button:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.toolbar button:active:not(:disabled) {
    transform: translateY(0);
}

.toolbar button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.toolbar select, .toolbar input[type="number"] {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
}

.toolbar input[type="number"] {
    width: 60px;
    text-align: center;
}

/* === EROTTAJA === */
.separator {
    width: 1px;
    height: 28px;
    background: linear-gradient(to bottom, transparent, var(--border-light), transparent);
    margin: 0 8px;
}

/* === TYÖKALUPAINIKKEET === */
.tool-btn {
    position: relative;
}

.tool-btn.active, .style-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover)) !important;
    border-color: var(--accent) !important;
    box-shadow: 0 0 12px rgba(233, 69, 96, 0.4);
}

/* === ZOOM-KONTROLLIT === */
.zoom-controls {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-tertiary);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.zoom-controls button {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    font-size: 18px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

#zoom-level {
    min-width: 50px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
}

/* === PÄÄRAKENNE === */
#main-container {
    display: grid;
    grid-template-columns: 200px 1fr 240px;
    flex-grow: 1;
    overflow: hidden;
}

#main-container.sidebar-hidden {
    grid-template-columns: 200px 1fr;
}

/* === PIKKUKUVAPALKKI === */
#thumbnail-sidebar {
    background-color: var(--bg-secondary);
    padding: 12px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
}

#thumbnail-sidebar::-webkit-scrollbar {
    width: 8px;
}

#thumbnail-sidebar::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

#thumbnail-sidebar::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

#thumbnail-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

.thumbnail-item {
    position: relative;
    margin-bottom: 12px;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    padding: 8px;
    border-radius: 12px;
    background-color: var(--bg-tertiary);
    transition: all 0.2s ease;
}

.thumbnail-item:hover {
    border-color: var(--border-light);
    transform: scale(1.02);
}

.thumbnail-item.active {
    border-color: var(--accent);
    background-color: rgba(233, 69, 96, 0.1);
    box-shadow: 0 0 16px rgba(233, 69, 96, 0.2);
}

.thumbnail-item canvas {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px var(--shadow);
}

.thumbnail-item p {
    margin: 8px 0 0 0;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.thumbnail-item.dragging {
    opacity: 0.4;
    transform: scale(0.95);
}

/* Pudotusindikaattorit pikkukuvan ylä-/alapuolelle */
.thumbnail-item.drop-above::before,
.thumbnail-item.drop-below::after {
    content: '';
    position: absolute;
    left: 8px;
    right: 8px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
    z-index: 10;
}

.thumbnail-item.drop-above::before {
    top: -8px;
}

.thumbnail-item.drop-below::after {
    bottom: -8px;
}

/* === CANVAS-ALUE === */
#canvas-container {
    flex-grow: 1;
    overflow: auto;
    background-color: var(--bg-canvas);
    background-image:
        radial-gradient(circle at 25% 25%, rgba(233, 69, 96, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(15, 52, 96, 0.05) 0%, transparent 50%);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 24px;
}

#canvas-container::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

#canvas-container::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

#canvas-container::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 6px;
    border: 3px solid var(--bg-tertiary);
}

#canvas-container::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

canvas {
    border: none;
    box-shadow: 0 8px 32px var(--shadow-lg);
    background-color: white;
    border-radius: 4px;
}

.crosshair-cursor {
    cursor: crosshair;
}

/* === OMINAISUUSPANEELI === */
#properties-sidebar {
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border);
    padding: 20px;
    overflow-y: auto;
    font-size: 13px;
}

#properties-sidebar.hidden {
    display: none;
}

#properties-sidebar h3 {
    margin-top: 0;
    margin-bottom: 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 12px;
}

.prop-section {
    margin-bottom: 24px;
    padding: 16px;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.prop-section h4 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prop-grid {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 10px;
    align-items: center;
}

.prop-grid label, .prop-item label {
    font-weight: 500;
    color: var(--text-secondary);
}

.prop-grid input, .prop-item input, .prop-item select {
    width: 100%;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    transition: border-color 0.2s ease;
}

.prop-grid input:focus, .prop-item input:focus, .prop-item select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.prop-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.prop-item-row {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.prop-item-row .style-btn {
    flex: 1;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.prop-item-row .style-btn:hover {
    border-color: var(--accent);
    background-color: var(--bg-tertiary);
}

/* Color picker */
input[type="color"] {
    width: 50px;
    height: 36px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

input[type="color"]::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: 6px;
}

/* Range slider */
input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-primary);
    outline: none;
    margin-top: 8px;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow);
    transition: transform 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#opacity-value {
    font-weight: 600;
    color: var(--accent);
}

/* === KONTEKSTIVALIKKO === */
#context-menu, #page-context-menu {
    position: fixed;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    box-shadow: 0 8px 24px var(--shadow-lg);
    border-radius: 12px;
    padding: 8px 0;
    z-index: 1000;
    min-width: 180px;
}

#context-menu.hidden, #page-context-menu.hidden {
    display: none;
}

#context-menu ul, #page-context-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

#context-menu li, #page-context-menu li {
    padding: 10px 16px;
    font-size: 13px;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

#context-menu li:hover, #page-context-menu li:hover {
    background-color: var(--accent);
    color: white;
}

.ctx-separator {
    height: 1px !important;
    background-color: var(--border) !important;
    margin: 6px 12px !important;
    padding: 0 !important;
    pointer-events: none;
}

/* === SIVUNAVIGAATIO === */
#nav-bar {
    justify-content: center;
}

#page-nav-input-container {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-tertiary);
    padding: 4px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

#page-input {
    width: 60px;
    text-align: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: 600;
    -moz-appearance: textfield;
    appearance: textfield;
}

#page-input::-webkit-outer-spin-button,
#page-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

#page-indicator {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* === TASAUSPAINIKKEET === */
.align-btn {
    min-width: 50px;
    font-size: 12px;
}

/* === ANIMAATIOT === */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

#context-menu:not(.hidden), #page-context-menu:not(.hidden) {
    animation: fadeIn 0.15s ease;
}

/* === RESPONSIIVISUUS === */
@media (max-width: 1200px) {
    #main-container {
        grid-template-columns: 160px 1fr 200px;
    }
}

@media (max-width: 900px) {
    #main-container {
        grid-template-columns: 140px 1fr;
    }

    #properties-sidebar {
        display: none;
    }
}

@media (max-width: 600px) {
    .toolbar {
        flex-wrap: wrap;
        padding: 8px;
    }

    #main-container {
        grid-template-columns: 1fr;
    }

    #thumbnail-sidebar {
        display: none;
    }
}