/* ==========================================================================
    PRODRAW PROFESSIONAL - STYLESHEET
    A clean, modern, and high-performance design for digital illustration.
   ========================================================================== */

/* --- ROOT THEME VARIABLES --- */
:root {
    /* Color Palette - Light Mode (Warm/Creative) */
    --accent: #ff6b35;
    --accent-hover: #e85d2f;
    --accent-glow: rgba(255, 107, 53, 0.35);
    --bg-app: #fff7ed;
    --bg-side: rgba(255, 255, 255, 0.75);
    --bg-work: #ffe7d6;
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-pri: #431407;
    --text-sec: #7c2d12;
    --text-mut: #c2410c;
    --border: rgba(254, 215, 170, 0.7);

    /* Shadows & Elevation */
    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    --shadow-elevated: 0 30px 60px rgba(0, 0, 0, 0.16);

    /* Spacing & Borders */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --transition: all 0.2s ease;
}

/* --- DARK MODE OVERRIDES (Neutral/Professional) --- */
body.dark-mode {
    --accent: #ff7a45;
    --accent-hover: #ff8f66;
    --accent-glow: rgba(255, 122, 69, 0.45);
    --bg-app: #0c0c0e;
    --bg-side: rgba(20, 20, 22, 0.85);
    --bg-work: #121214;
    --bg-card: rgba(30, 30, 34, 0.8);
    --text-pri: #f9fafb;
    --text-sec: #d1d5db;
    --text-mut: #9ca3af;
    --border: rgba(255, 255, 255, 0.08);
}

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

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: "Inter", sans-serif;
    color: var(--text-pri);
    display: flex;
    flex-direction: column;
    /* Soft decorative background gradients */
    background:
        radial-gradient(circle at top left, rgba(255, 122, 69, 0.12), transparent 30%),
        radial-gradient(circle at bottom right, rgba(255, 180, 120, 0.08), transparent 30%),
        var(--bg-app);
    transition: var(--transition);
}

button {
    border: none;
    outline: none;
    font: inherit;
    cursor: pointer;
    transition: var(--transition);
}

/* --- HEADER & NAVIGATION --- */
header {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    background: var(--bg-side);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-pri) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo .badge {
    font-size: 0.6rem;
    font-weight: 900;
    padding: 0.2rem 0.4rem;
    background: var(--accent);
    color: white;
    -webkit-text-fill-color: white;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.nav-center,
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-center {
    flex: 1;
    justify-content: center;
}

/* --- TOOLBAR GROUPS (Undo/Redo, Zoom) --- */
.nav-group {
    padding: 0.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 2px;
}

body.dark-mode .nav-group {
    background: rgba(35, 35, 39, 0.9);
    border-color: rgba(255, 255, 255, 0.12);
}

.nav-group:hover {
    border-color: var(--accent);
}

.toolbar-group .btn-icon,
.toolbar-group .btn-text {
    border: none;
    background: transparent;
    border-radius: 999px;
    font-weight: 600;
}

.toolbar-group .btn-text {
    padding: 0 0.75rem;
    color: var(--text-sec);
}

.toolbar-group .btn-icon:hover,
.toolbar-group .btn-text:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: translateY(-1px);
    color: var(--accent);
}

body.dark-mode .toolbar-group button {
    background: rgba(255, 255, 255, 0.04);
}

body.dark-mode .toolbar-group button:hover {
    background: rgba(255, 255, 255, 0.12);
}

.nav-divider {
    width: 1px;
    height: 18px;
    background: var(--border);
    margin: 0 0.5rem;
}

/* --- ZOOM INPUT --- */
.zoom-input-wrapper {
    position: relative;
    width: 70px;
    margin: 0 4px;
}

.zoom-control-input {
    width: 100%;
    height: 32px;
    border: none;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-pri);
    transition: var(--transition);
}

body.dark-mode .zoom-control-input {
    background: rgba(255, 255, 255, 0.05);
}

.zoom-control-input:focus {
    background: white;
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-glow);
    color: var(--accent);
}

body.dark-mode .zoom-control-input:focus {
    background: var(--bg-app);
}

/* --- MAIN LAYOUT & SIDEBAR --- */
main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.sidebar {
    width: 240px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-side);
    border-right: 1px solid var(--border);
    backdrop-filter: blur(18px);
    overflow-y: auto;
}

.workspace {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-work);
    overflow: hidden;
}

/* --- TOOL CARDS --- */
.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.card-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-mut);
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.sidebar button {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    min-height: 74px;
    border-radius: var(--radius-sm);
    background: var(--bg-app);
    border: 1px solid var(--border);
    color: var(--text-pri);
}

body.dark-mode .sidebar button {
    background: rgba(45, 45, 50, 0.5);
}

body.dark-mode .sidebar button:hover {
    background: rgba(60, 60, 65, 0.8);
}

.sidebar button.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    border-color: transparent;
    box-shadow: 0 12px 30px var(--accent-glow);
}

/* --- SETTINGS: COLOR & SIZE --- */
.settings-box {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.color-picker-large {
    width: 100%;
    height: 40px;
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
}

.recent-colors {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.4rem;
}

.color-swatch {
    aspect-ratio: 1;
    border-radius: 8px;
    border: 2px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

body.dark-mode .color-swatch {
    border-color: rgba(255, 255, 255, 0.1);
}

.color-swatch.active {
    border-color: white;
    outline: 2px solid var(--accent);
    transform: scale(1.08);
}

.range-slider {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 999px;
    appearance: none;
    -webkit-appearance: none;
    margin-top: 0.5rem;
}

body.dark-mode .range-slider {
    background: rgba(255, 255, 255, 0.1);
}

.range-slider::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

/* --- CANVAS STYLING --- */
#canvas-wrapper {
    position: relative;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid rgba(0, 0, 0, 0.08);
    box-shadow: var(--shadow-elevated);
    resize: both;
    min-width: 200px;
    min-height: 200px;
}

#canvas-wrapper::-webkit-resizer {
    background-color: transparent;
    border-style: solid;
    border-width: 15px;
    border-color: transparent var(--accent) var(--accent) transparent;
}

body.dark-mode #canvas-wrapper {
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

#draw,
#overlay {
    position: absolute;
    inset: 0;
    display: block;
}

/* --- EXPORT & DANGER BUTTONS --- */
.btn-export {
    padding: 0.6rem 1.1rem;
    border-radius: 999px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    box-shadow: 0 10px 25px var(--accent-glow);
}

.btn-danger {
    width: 100%;
    padding: 0.8rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    background: #fff1f2;
    color: #e11d48;
    border: 1px solid #fecaca;
}

body.dark-mode .btn-danger {
    background: rgba(225, 29, 72, 0.1);
    border-color: rgba(225, 29, 72, 0.2);
    color: #fb7185;
}

/* --- STATUS BAR --- */
.status-bar {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    padding: 0.55rem 1rem;
    border-radius: 999px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    font-size: 0.75rem;
    font-weight: 700;
    pointer-events: none;
}

/* --- MODALS --- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.modal {
    width: 90%;
    max-width: 340px;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-elevated);
}

.modal-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-top: 1rem;
}

.modal-grid button {
    padding: 1rem;
    border-radius: var(--radius-sm);
    background: var(--bg-app);
    border: 1px solid var(--border);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 768px) {
    main {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        flex-direction: row;
        overflow-x: auto;
    }

    .nav-center {
        display: none;
    }

    .sidebar button {
        min-width: 80px;
        min-height: 60px;
    }
}