:root {
    --primary: #f97316; /* Orange */
    --primary-hover: #ea580c;
    --accent: #fcd34d; /* Yellow */
    
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --input-bg: rgba(15, 23, 42, 0.6);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Cairo', sans-serif; }

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(at 0% 0%, rgba(249, 115, 22, 0.15) 0px, transparent 50%),
                      radial-gradient(at 100% 100%, rgba(252, 211, 77, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    padding: 40px 20px;
    display: flex; justify-content: center; align-items: center;
}

.app-container { width: 100%; max-width: 900px; display: flex; flex-direction: column; gap: 25px; }

.tool-card {
    background: var(--card-bg); backdrop-filter: blur(16px);
    border: 1px solid var(--border-color); border-radius: 24px; padding: 35px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.tool-header { text-align: center; margin-bottom: 30px; }
.icon-wrapper {
    display: inline-flex; justify-content: center; align-items: center;
    width: 70px; height: 70px; background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 20px; margin-bottom: 16px; box-shadow: 0 10px 25px -5px rgba(249, 115, 22, 0.5);
}
.icon-wrapper ion-icon { font-size: 36px; color: white; }
.tool-header h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.tool-header p { color: var(--text-muted); font-size: 1rem; }

.converter-body { display: flex; flex-direction: column; gap: 30px; }

/* Categories */
.categories-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
    background: rgba(0,0,0,0.2); padding: 10px; border-radius: 16px; border: 1px solid var(--border-color);
}
.cat-btn {
    background: transparent; border: 1px solid transparent; color: var(--text-muted);
    padding: 12px; border-radius: 12px; font-size: 1rem; font-weight: 700; cursor: pointer;
    display: flex; justify-content: center; align-items: center; gap: 8px; transition: all 0.3s;
}
.cat-btn ion-icon { font-size: 1.3rem; color: var(--primary); }
.cat-btn:hover { background: rgba(255,255,255,0.05); }
.cat-btn.active {
    background: var(--primary); color: #fff; box-shadow: 0 10px 20px rgba(249, 115, 22, 0.3);
}
.cat-btn.active ion-icon { color: #fff; }

/* Workspace */
.conversion-workspace {
    display: flex; align-items: center; gap: 20px; background: var(--input-bg);
    padding: 30px; border-radius: 20px; border: 1px solid var(--border-color);
}
.input-panel { flex: 1; display: flex; flex-direction: column; gap: 15px; }
.input-panel label { font-size: 1rem; font-weight: 700; color: var(--text-muted); }

select, input[type="number"] {
    width: 100%; background: var(--bg-color); border: 1px solid var(--border-color);
    color: var(--text-main); font-size: 1.2rem; padding: 15px; border-radius: 12px;
    outline: none; transition: all 0.3s; font-weight: 700;
}
select:focus, input[type="number"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2); }
select option { background: var(--bg-color); }

.result-display {
    width: 100%; background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(252, 211, 77, 0.1));
    border: 1px solid var(--primary); color: #fff; font-size: 1.5rem; padding: 15px; border-radius: 12px;
    font-weight: 800; min-height: 60px; display: flex; align-items: center; overflow-x: auto;
}
.result-display::-webkit-scrollbar { height: 4px; }
.result-display::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 10px; }

.swap-btn {
    background: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-muted);
    width: 50px; height: 50px; border-radius: 50%; display: flex; justify-content: center; align-items: center;
    cursor: pointer; transition: all 0.3s; flex-shrink: 0; margin-top: 25px;
}
.swap-btn ion-icon { font-size: 1.5rem; }
.swap-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: rotate(180deg); }

/* SEO */
.seo-content { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 20px; padding: 25px; }
.seo-content h2 { font-size: 1.3rem; color: #fff; margin-bottom: 12px; }
.seo-content p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.8; margin-bottom: 10px; }
.seo-content strong { color: var(--primary); }

.ads-container { width: 100%; display: flex; justify-content: center; }
.ads-placeholder { width: 100%; max-width: 728px; height: 90px; background: rgba(15, 23, 42, 0.5); border: 1px dashed rgba(255, 255, 255, 0.2); border-radius: 12px; display: flex; justify-content: center; align-items: center; color: var(--text-muted); }

@media (max-width: 768px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .conversion-workspace { flex-direction: column; }
    .swap-btn { transform: rotate(90deg); margin: 0; }
    .swap-btn:hover { transform: rotate(270deg); }
}


/* Light Mode Theme Auto-injected */
body.light-mode {
    --bg-color: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.85);
    --input-bg: rgba(255, 255, 255, 0.95);
    --text-main: #0f172a;
    --text-muted: #475569;
    --border-color: rgba(0, 0, 0, 0.1);
}

body.light-mode .tool-card, 
body.light-mode .article-container,
body.light-mode .seo-content {
    background: rgba(255, 255, 255, 0.9) !important;
    color: #0f172a !important;
}

body.light-mode select, 
body.light-mode input, 
body.light-mode textarea {
    background: #fff;
    color: #0f172a;
    border-color: rgba(0,0,0,0.2);
}

body.light-mode .logo { color: #0f172a !important; text-shadow: none !important; }



/* Layout Fixes for Header & Footer */
body {
    display: block !important;
}
.app-container, .article-container {
    margin-left: auto !important;
    margin-right: auto !important;
}