/*
   CASE 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 {
    --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 */
html.light-theme {
    --bg-dark:          #f8fafc;
    --primary-accent:   #2563eb;
    --secondary-accent: #7c3aed;
    --text-main:        #0f172a;
    --text-muted:       #475569;
    --card-bg:          #ffffff;
    --card-border:      rgba(0, 0, 0, 0.1);
    --input-bg:         #f1f5f9;
}

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

/* FIX: Removed global overflow-x: hidden to restore accessibility constraints */
html, body {
    width: 100%;
    transition: background-color 0.2s ease;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* --- Accessibility --- */
.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;
}

/* Custom Scrollbars */
::-webkit-scrollbar        { width: 8px; height: 8px; }
::-webkit-scrollbar-track  { background: rgba(150,150,150,0.1); border-radius: 4px; }
::-webkit-scrollbar-thumb  { background: rgba(150,150,150,0.3); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(150,150,150,0.5); }

textarea {
    scrollbar-width: thin;
    scrollbar-color: rgba(150,150,150,0.3) transparent;
}

.background-glow {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at center, rgba(59,130,246,0.08) 0%, rgba(10,10,15,0) 50%);
    z-index: -1; pointer-events: none;
}
html.light-theme .background-glow {
    background: radial-gradient(circle at center, rgba(37,99,235,0.05) 0%, transparent 50%);
}

/* --- Header --- */
.tool-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.5rem 5%; max-width: 1400px; margin: 0 auto; width: 100%;
    flex-wrap: wrap; gap: 10px;
}
.header-right {
    display: flex; align-items: center; gap: 1rem;
}
.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); color: var(--primary-accent); }
.logo      { font-family: var(--font-heading); font-size: 1.2rem; }
.logo span { color: var(--primary-accent); }

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    font-size: 1.25rem; transition: color 0.2s; padding: 6px;
    display: flex; align-items: center; justify-content: center;
}
.theme-toggle-btn:hover         { color: var(--primary-accent); }
.theme-toggle-btn:focus-visible { outline: 2px solid var(--primary-accent); border-radius: 4px; }

/* --- Main Layout --- */
.main-content   { flex-grow: 1; padding: 2rem 5%; max-width: 900px; margin: 0 auto; width: 100%; }
.tool-container { display: flex; flex-direction: column; }

.tool-intro          { text-align: center; margin-bottom: 2rem; }
.tool-intro h2       { font-family: var(--font-heading); margin-bottom: 0.5rem; font-size: 2rem; line-height: 1.2; }
.tool-intro p        { color: var(--text-muted); }

/* Card */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
}

/* Editor Header */
.editor-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1rem; padding-bottom: 10px;
    border-bottom: 1px solid var(--card-border);
    gap: 10px; flex-wrap: wrap;
}

.stats-bar {
    display: flex; gap: 1.5rem; font-size: 0.9rem; color: var(--text-muted);
    flex-wrap: wrap;
}
.stat      { display: flex; align-items: center; gap: 6px; }
.stat span { color: var(--text-main); font-weight: bold; font-family: var(--font-code); }

.actions { display: flex; gap: 8px; flex-shrink: 0; }

.icon-btn {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    min-width: 44px;
    min-height: 44px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
}
.icon-btn:hover         { border-color: var(--primary-accent); color: var(--primary-accent); background: rgba(59,130,246,0.1); }
.icon-btn:focus-visible { outline: 2px solid var(--primary-accent); }
.icon-btn.remove:hover  { border-color: #ef4444; color: #ef4444; background: rgba(239,68,68,0.1); }

/* Textarea */
.editor-card textarea {
    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-body);
    font-size: 1.1rem;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}
.editor-card textarea:focus         { border-color: var(--primary-accent); }
.editor-card textarea:focus-visible { outline: none; }

/* Controls */
.controls-section { display: flex; flex-direction: column; gap: 2rem; }

.control-group h3 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-left: 3px solid var(--primary-accent);
    padding-left: 10px;
}

.btn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(140px, 100%), 1fr));
    gap: 10px;
}

.control-btn {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    font-size: 0.95rem;
    font-family: var(--font-body);
    min-height: 44px;
    text-align: center;
}
.control-btn:hover         { background: var(--primary-accent); color: #fff; border-color: var(--primary-accent); transform: translateY(-2px); }
.control-btn:focus-visible { outline: 2px solid var(--primary-accent); }
/* Active State applied by JS */
.control-btn.active        { background: var(--primary-accent); color: #fff; border-color: var(--primary-accent); }

/* Toast */
.toast {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    background: #1e1e24; border: 1px solid var(--primary-accent);
    color: #fff; padding: 10px 20px; border-radius: 8px; z-index: 2000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5); font-size: 0.9rem;
    white-space: nowrap; opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
}
html.light-theme .toast { background: #ffffff; color: #0f172a; border-color: var(--primary-accent); }
.toast.toast-visible { opacity: 1; pointer-events: auto; }

/* Inline Code styling */
code {
    font-family: var(--font-code);
    background: rgba(59,130,246,0.12);
    border: 1px solid rgba(59,130,246,0.2);
    color: var(--primary-accent);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* Info & FAQ */
.info-section    { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--card-border); }
.info-section h2 { font-family: var(--font-heading); color: var(--text-main); margin-bottom: 1.5rem; font-size: 1.4rem; text-align: center; }

.info-grid    { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.info-grid h3 { color: var(--primary-accent); font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: 0.5rem; }
.info-grid i  { margin-right: 8px; }
.info-grid p  { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.faq-container    { margin-top: 2rem; }
.faq-container h3 { font-family: var(--font-heading); color: var(--text-main); margin: 1.5rem 0 1rem; }
.faq-container h4 { color: var(--secondary-accent); font-size: 1rem; margin-bottom: 0.5rem; margin-top: 1.5rem; font-family: var(--font-body); }
.faq-container p  { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 1rem; line-height: 1.6; }

footer       { text-align: center; padding: 3rem 0; color: var(--text-muted); font-size: 0.9rem; border-top: 1px solid var(--card-border); margin-top: 3rem; }
footer a     { color: var(--text-main); text-decoration: none; }
footer a:hover { color: var(--primary-accent); text-decoration: underline; }

/* === RESPONSIVE === */

@media (max-width: 768px) {
    .editor-card textarea { resize: none; min-height: 200px; }
}

@media (max-width: 600px) {
    .btn-grid       { grid-template-columns: 1fr 1fr; }
    .editor-header  { flex-direction: column; align-items: flex-start; }
    .stats-bar      { width: 100%; justify-content: space-between; }
    .actions        { width: 100%; justify-content: flex-end; }
}

@media (max-width: 480px) {
    .tool-header    { padding: 1rem; flex-direction: column; align-items: flex-start; }
    .header-right   { display: flex; width: 100%; justify-content: space-between; flex-direction: row-reverse; }
    .main-content   { padding: 1rem; }
    .tool-intro h2  { font-size: 1.4rem; }
    .card           { padding: 1rem; border-radius: 12px; }
    .editor-card textarea { font-size: 1rem; min-height: 160px; }
    .control-btn    { font-size: 0.85rem; padding: 10px 8px; }
    .btn-grid       { gap: 8px; }
    .stats-bar      { font-size: 0.8rem; gap: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration:   0.01ms !important;
        transition-duration:  0.01ms !important;
    }
    .control-btn:hover { transform: none; }
}