/* =============================================================
   XML Toolkit — Unified Design System
   Matches frankfarukceviz.uk (D-Summary)
   ============================================================= */

:root {
    --bg-color: #fcfcfc;
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-tertiary: #888888;
    --accent-color: #000000;
    --border-color: #e2e2e2;
    --font-family: 'Inter', sans-serif;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;

    --nav-height: 80px;
    --max-w: 1200px;
    --ease: 0.2s ease;
    
    /* App Specific */
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --output-bg: #f9f9f9;
}

/* ----- Reset & Base ----- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ----- Layout ----- */
.page-container {
    max-width: var(--max-w);
    margin: var(--nav-height) auto 0;
    padding: 40px 24px;
}

.app-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.app-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ----- Components ----- */
.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

@media (max-width: 992px) {
    .grid { grid-template-columns: 1fr; }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card__title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: var(--text-tertiary);
}

.card__actions {
    display: flex;
    gap: 8px;
}

/* ----- Editor ----- */
.editor-box {
    width: 100%;
    height: 350px;
    border: 1px solid var(--border-color);
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    overflow: auto;
    background: var(--input-bg);
    outline: none;
}

.editor-box.output {
    background: var(--output-bg);
}

/* ----- Buttons ----- */
.button-group {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.button {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all var(--ease);
    display: flex;
    align-items: center;
    gap: 8px;
}

.button:hover {
    border-color: var(--text-primary);
    background: #f5f5f5;
}

.button.primary {
    background: var(--text-primary);
    color: #fff;
    border-color: var(--text-primary);
}

.button.primary:hover {
    background: transparent;
    color: var(--text-primary);
}

.button.small {
    padding: 6px 12px;
    font-size: 0.65rem;
}

/* ----- Sections ----- */
.tool-section {
    background: #fff;
    border: 1px solid var(--border-color);
    padding: 32px;
    margin-bottom: 32px;
}

.tool-section__header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.tool-section__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f0f0;
    border-radius: 8px;
}

.tool-section__title h3 {
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
}

.tool-section__title p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Color Mapping */
.mapping-controls {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.mapping-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.mapping-item label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.color-picker-wrapper {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.color-picker-wrapper input {
    position: absolute;
    top: -5px;
    left: -5px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    border: none;
    background: none;
}

/* UI Tools */
.ui-tools-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-field label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.input-field input {
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    font-size: 0.9rem;
    width: 150px;
    outline: none;
}

.input-field input:focus {
    border-color: var(--text-primary);
}

/* ----- Keyboard Visualizer ----- */
.keyboard-section {
    background: #111;
    border-radius: 1px;
    padding: 48px 24px;
    margin-bottom: 64px;
    overflow: hidden;
    color: #fff;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.keyboard-scroll {
    overflow-x: auto;
    padding-bottom: 24px;
}

.keyboard-scroll::-webkit-scrollbar { height: 6px; }
.keyboard-scroll::-webkit-scrollbar-thumb { background: #333; }

#midi-keyboard {
    margin: 0 auto;
    display: block;
}

.keyboard-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 0 16px;
}

.mode-badge {
    padding: 4px 12px;
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid #333;
    color: #fff;
}

.mode-badge.active {
    background: #fff;
    color: #000;
    border-color: #fff;
}

/* ----- Navbar & Footer ----- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.navbar__logo-img { height: 36px; filter: invert(1); }
.navbar__menu { display: flex; list-style: none; gap: 32px; }
.navbar__link { 
    color: var(--text-secondary); text-decoration: none; 
    font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em;
}
.navbar__link.active { color: var(--text-primary); }

.footer { padding: 80px 40px; border-top: 1px solid var(--border-color); background: #fff; }
.footer__inner { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.footer__brand h2 { font-size: 1.5rem; margin-bottom: 16px; }
.footer__newsletter h3 { font-size: 0.8rem; text-transform: uppercase; margin-bottom: 16px; }
.footer__form { display: flex; gap: 0; border: 1px solid var(--border-color); overflow: hidden; }
.footer__form input { flex: 1; border: none; padding: 12px; outline: none; }
.footer__form button { background: var(--text-primary); color: #fff; border: none; padding: 0 24px; cursor: pointer; }

/* Utilities */
.hidden { display: none !important; }
.visually-hidden { position: absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }

/* Prism Overrides for Light Mode */
code[class*="language-"], pre[class*="language-"] { color: #111 !important; text-shadow: none !important; }
.token.tag { color: #000 !important; font-weight: 700 !important; }
.token.attr-name { color: #555 !important; }
.token.attr-value { color: #888 !important; }
.token.punctuation { color: #ccc !important; }
.token.comment { color: #bbb !important; }

@media (max-width: 768px) {
    .page-container { padding: 24px 16px; }
    .footer__inner { grid-template-columns: 1fr; gap: 32px; }
}