/*
   HTML TO TEXT CONVERTER - EXPERT WEB TOOLS
*/

@font-face { font-family: 'Inter';       src: url('/fonts/inter-v20-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Orbitron';    src: url('/fonts/orbitron-v35-latin-700.woff2')  format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Roboto Mono'; src: url('/fonts/roboto-mono-v31-latin-regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }

:root {
    /* Default Dark Variables */
    --bg-dark:          #0a0a0f;
    --primary-accent:   #3b82f6;
    --secondary-accent: #8b5cf6;
    --text-main:        #ffffff;
    --text-muted:       #94a3b8;
    --card-bg:          rgba(25, 25, 35, 0.6);
    --card-border:      rgba(255, 255, 255, 0.08);
    --input-bg:         rgba(255, 255, 255, 0.05);
    
    --font-heading:     'Orbitron', sans-serif;
    --font-body:        'Inter', sans-serif;
    --font-code:        'Roboto Mono', monospace;
}

/* Light Theme Variables */
:root[data-theme="light"] {
    --bg-dark:          #f8fafc;
    --primary-accent:   #2563eb;
    --secondary-accent: #7c3aed;
    --text-main:        #0f172a;
    --text-muted:       #475569;
    --card-bg:          rgba(255, 255, 255, 0.9);
    --card-border:      rgba(0, 0, 0, 0.1);
    --input-bg:         #ffffff;
}

/* System Fallback (when JS/localStorage defaults to system) */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg-dark:          #f8fafc;
        --primary-accent:   #2563eb;
        --secondary-accent: #7c3aed;
        --text-main:        #0f172a;
        --text-muted:       #475569;
        --card-bg:          rgba(255, 255, 255, 0.9);
        --card-border:      rgba(0, 0, 0, 0.1);
        --input-bg:         #ffffff;
    }
}

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

html { width: 100%; max-width: 100vw; overflow-x: hidden; }

body {
    background-color: var(--bg-dark); color: var(--text-main);
    font-family: var(--font-body); min-height: 100vh;
    display: flex; flex-direction: column; overflow-x: hidden;
    line-height: 1.6; transition: background-color 0.3s ease;
}

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

::-webkit-scrollbar        { width: 8px; height: 8px; }
::-webkit-scrollbar-track  { background: rgba(0,0,0,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb  { background: var(--text-muted); border-radius: 4px; opacity: 0.5; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-accent); }

textarea {
    scrollbar-width: thin;
    scrollbar-color: var(--text-muted) transparent;
}

.background-glow {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at center, rgba(59,130,246,0.06) 0%, rgba(10,10,15,0) 50%);
    z-index: -1; pointer-events: none;
}

/* Header */
.tool-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.5rem 5%; max-width: 1400px; margin: 0 auto; width: 100%;
}
.back-btn {
    color: var(--text-muted); text-decoration: none;
    display: flex; align-items: center; gap: 8px;
    transition: color 0.3s; border-radius: 4px; padding: 2px 4px;
}
.back-btn:hover         { color: var(--primary-accent); }
.back-btn:focus-visible { outline: 2px solid var(--primary-accent); }

.logo-group { display: flex; align-items: center; gap: 20px; }
.logo       { font-family: var(--font-heading); font-size: 1.2rem; }
.logo span  { color: var(--primary-accent); }

.theme-btn {
    background: transparent; border: none; color: var(--text-muted);
    font-size: 1.1rem; cursor: pointer; padding: 8px; border-radius: 4px;
    transition: all 0.3s; min-width: 44px; min-height: 44px;
}
.theme-btn:hover, .theme-btn:focus-visible { 
    color: var(--primary-accent); outline: 2px solid var(--primary-accent);
}

/* Main Layout */
.main-content { flex-grow: 1; padding: 2rem 5%; max-width: 1400px; margin: 0 auto; width: 100%; }

.tool-container {
    background: var(--card-bg); border: 1px solid var(--card-border);
    border-radius: 16px; padding: 2rem;
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.tool-intro    { text-align: center; margin-bottom: 2rem; }
.tool-intro h1 { font-family: var(--font-heading); margin-bottom: 0.5rem; font-size: 2rem; line-height: 1.2; }
.tool-intro p  { color: var(--text-muted); }

/* Toolbar */
.toolbar {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--card-border);
    flex-wrap: wrap; gap: 1rem;
}
.options-group { display: flex; flex-wrap: wrap; gap: 15px; align-items: center; }

.checkbox-wrapper {
    display: flex; align-items: center; gap: 8px;
    color: var(--text-main); cursor: pointer;
    font-size: 0.95rem; user-select: none; padding: 4px 0;
}
.checkbox-wrapper input[type="checkbox"] {
    accent-color: var(--primary-accent);
    width: 18px; height: 18px; cursor: pointer;
}
.checkbox-wrapper input[type="checkbox"]:focus-visible { outline: 2px solid var(--primary-accent); outline-offset: 2px; }

.button-group { display: flex; gap: 10px; }

.secondary-btn, .danger-btn, .icon-btn {
    border: 1px solid var(--card-border); border-radius: 6px;
    cursor: pointer; font-weight: 600; font-size: 0.9rem;
    transition: all 0.2s; display: flex; align-items: center;
    gap: 6px; white-space: nowrap; font-family: var(--font-body);
    min-height: 44px; /* WCAG 44px min */
}

.secondary-btn { background: transparent; color: var(--text-muted); padding: 8px 16px; }
.secondary-btn:hover { background: var(--input-bg); color: var(--text-main); border-color: var(--text-muted); }
.secondary-btn:focus-visible { outline: 2px solid var(--primary-accent); }

.danger-btn { background: transparent; color: #ef4444; border-color: rgba(239,68,68,0.3); padding: 8px 16px; }
.danger-btn:hover { background: rgba(239,68,68,0.1); }
.danger-btn:focus-visible { outline: 2px solid #ef4444; }

.output-actions { display: flex; gap: 5px; align-items: center; }

.icon-btn {
    background: var(--input-bg); color: var(--text-muted);
    min-width: 44px; justify-content: center;
}
.icon-btn:hover { color: var(--primary-accent); border-color: var(--primary-accent); }
.icon-btn:focus-visible { outline: 2px solid var(--primary-accent); }

/* Editor Grid */
.io-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1.5rem; min-height: 500px;
}
.io-column {
    display: flex; flex-direction: column;
    min-width: 0; flex: 1;
}
.column-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 10px; flex-shrink: 0;
}
.column-header label {
    font-family: var(--font-heading); font-size: 0.9rem;
    color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px;
}

.badge {
    background: var(--input-bg); padding: 4px 10px;
    border: 1px solid var(--card-border);
    border-radius: 4px; font-size: 0.75rem; color: var(--text-muted);
}

textarea {
    flex: 1; width: 100%; min-height: 250px;
    background: var(--input-bg); border: 1px solid var(--card-border);
    border-radius: 8px; padding: 1rem; color: var(--text-main);
    font-family: var(--font-code); font-size: 0.95rem;
    line-height: 1.6; resize: vertical; outline: none;
    transition: border-color 0.2s;
    word-break: break-word; /* Prevents base64 horizontal scrolling */
}
textarea:focus { border-color: var(--primary-accent); }

code {
    font-family: var(--font-code); background: var(--input-bg);
    color: var(--primary-accent); padding: 2px 6px;
    border: 1px solid var(--card-border); border-radius: 4px;
    font-size: 0.85em;
}

/* Toast */
.toast {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    background: #1e293b; border: 1px solid var(--primary-accent);
    color: #fff; padding: 12px 24px; border-radius: 8px; z-index: 2000;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3); font-weight: 500;
    font-size: 0.9rem; white-space: nowrap;
    opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.toast.toast-visible { opacity: 1; pointer-events: auto; }

/* Info Section */
.info-section {
    margin-top: 4rem; padding: 0 1rem;
    max-width: 1200px; margin-left: auto; margin-right: auto;
}
.info-section h2 {
    font-family: var(--font-heading); color: var(--text-main);
    margin-bottom: 2rem; font-size: 1.6rem; text-align: center;
}

.info-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem; margin-bottom: 4rem;
}
.info-grid h3 { color: var(--primary-accent); font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: 0.75rem; }
.info-grid i  { margin-right: 8px; }
.info-grid p  { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.faq-container { max-width: 800px; margin: 0 auto 2rem auto; }
.faq-container h2 {
    font-family: var(--font-heading); color: var(--secondary-accent);
    font-size: 1.5rem; margin-bottom: 1.5rem; padding-bottom: 10px; border-bottom: 1px solid var(--card-border);
}
.faq-container h3 { color: var(--text-main); font-size: 1.1rem; margin-bottom: 0.5rem; margin-top: 2rem; }
.faq-container p  { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

footer {
    text-align: center; padding: 2rem; color: var(--text-muted);
    font-size: 0.9rem; margin-top: auto; border-top: 1px solid var(--card-border);
}
footer a { color: var(--text-muted); text-decoration: none; margin-left: 10px; font-weight: 600; }
footer a:hover { color: var(--primary-accent); }

/* RESPONSIVE */
@media (max-width: 900px) {
    .io-grid { grid-template-columns: 1fr; }
    textarea { flex: none; min-height: 300px; }
}

@media (max-width: 768px) {
    .tool-header, .main-content { padding: 1rem; }
    .tool-container { padding: 1.5rem 1rem; }
    .toolbar { flex-direction: column; align-items: flex-start; }
    .button-group { width: 100%; justify-content: space-between; }
    .button-group .secondary-btn, .button-group .danger-btn { flex: 1; justify-content: center; }
}

@media (max-width: 480px) {
    .tool-header { flex-direction: column; gap: 10px; align-items: flex-start; }
    .logo-group { width: 100%; justify-content: space-between; }
    .tool-intro h1 { font-size: 1.5rem; }
    textarea { font-size: 0.875rem; min-height: 250px; padding: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}