:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --accent-color: #3b82f6;
    --danger-color: #ef4444;
    --success-color: #22c55e;
    --text-color: #f8fafc;
}

* { box-sizing: border-box; transition: all 0.2s ease; }
body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    background-color: var(--bg-color); 
    color: var(--text-color); 
    margin: 0; 
    padding: 0;
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    min-height: 100vh; 
}

.navbar { width: 100%; background-color: var(--card-bg); border-bottom: 1px solid #334155; padding: 15px 0; }
.nav-container { max-width: 1300px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
.nav-logo { font-size: 1.5rem; font-weight: bold; cursor: pointer; display: flex; align-items: center; gap: 10px; }
.nav-logo span { color: var(--accent-color); }
.nav-links { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; justify-content: center; }
.nav-link { color: var(--text-color); cursor: pointer; font-weight: 500; font-size: 0.95rem; }
.nav-link:hover, .nav-link.active { color: var(--accent-color); }

.container { width: 100%; max-width: 1300px; margin-top: 30px; padding: 0 20px; flex: 1; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
.page-section { display: none; width: 100%; animation: fadeIn 0.3s; }
.page-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.card { background-color: var(--card-bg); border-radius: 12px; padding: 25px; border: 1px solid #334155; margin-bottom: 25px;}

h2 { font-size: 1.3rem; border-bottom: 2px solid #334155; padding-bottom: 10px; color: #fff; margin-bottom: 20px; }
h3 { font-size: 1.1rem; color: #3b82f6; margin-top: 20px; margin-bottom: 10px; }
p { line-height: 1.6; color: #cbd5e1; }

.drop-zone { border: 2px dashed var(--accent-color); border-radius: 8px; padding: 25px; text-align: center; cursor: pointer; background-color: #0f172a; margin-bottom: 15px; }
.drop-zone:hover { border-color: #60a5fa; }
.toolbar { margin-bottom: 15px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.btn { color: white; border: none; padding: 12px 20px; font-weight: bold; border-radius: 8px; cursor: pointer; font-size: 0.9rem; text-align: center; display: inline-block;}
.btn-primary { background-color: var(--accent-color); }
.btn-danger { background-color: var(--danger-color); }
.btn-warning { background-color: #f59e0b; }
.btn-success { background-color: var(--success-color); }
.btn-full { width: 100%; padding: 14px; margin-top: 15px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.preview-area { background-color: #0f172a; border: 1px solid #475569; border-radius: 8px; padding: 15px; height: 350px; overflow-y: auto; font-size: 0.95rem; white-space: pre-wrap; line-height: 1.6; }
.mask { background-color: #000; color: var(--danger-color); padding: 2px 8px; border-radius: 4px; cursor: pointer; border: 1px solid var(--danger-color); font-weight: bold; user-select: none; margin: 0 2px; }
.mask::after { content: ""; }
.mask.revealed { background-color: var(--success-color); color: #fff; border-color: var(--success-color); }
.mask.revealed::after { content: ""; }
.mask:not(.revealed)::after { content:' ' attr(data-mask); }

.analysis-output { height: 500px; overflow-y: auto; color: #e2e8f0; line-height: 1.6; padding-right: 10px; }
.text-content { line-height: 1.8; color: #e2e8f0; padding: 30px; }

.pdf-viewer { margin-top:15px; border:1px solid #475569; border-radius:10px; background:#0b1220; overflow:hidden; display: none; }
.viewer-toolbar { display:flex; gap:10px; align-items:center; padding:10px; background:#1e293b; border-bottom:1px solid #334155; flex-wrap: wrap; }
.viewer-toolbar button { background:#3b82f6; color:#fff; border:none; padding:8px 12px; border-radius:6px; cursor:pointer; }
#pdfCanvas { display:block; margin:auto; max-width:100%; background:white; }

.modal { display:none; position:fixed; inset:0; background:rgba(0,0,0,.75); align-items:center; justify-content:center; z-index:9999; padding: 20px; }
.modal-content { background:#1e293b; color:#fff; width:100%; max-width:500px; max-height:90vh; border-radius:12px; padding:25px; border:1px solid #475569; display:flex; flex-direction:column; overflow-y: auto; position: relative; margin: 0 auto;}

.custom-lang-selector { position: relative; display: inline-block; }
.lang-btn { background: #1e293b; color: #fff; border: 1px solid #334155; border-radius: 8px; padding: 6px 12px; cursor: pointer; display: flex; align-items: center; justify-content: center; height: 35px; width: 45px; }
.lang-btn img { width: 22px; border-radius: 2px; }
.lang-menu { display: none; position: absolute; top: 100%; right: 0; background: #1e293b; border: 1px solid #334155; border-radius: 8px; margin-top: 5px; overflow: hidden; z-index: 1000; flex-direction: column; min-width: 140px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); }
.lang-menu.show { display: flex; }
.lang-option { padding: 10px 15px; cursor: pointer; display: flex; align-items: center; gap: 10px; transition: 0.2s; font-size: 0.9rem; color: #f8fafc; }
.lang-option:hover { background: #334155; }
.lang-option img { width: 20px; border-radius: 2px; }

.profile-nav button { padding: 10px 20px; background: transparent; color: #cbd5e1; border: 1px solid #475569; border-radius: 8px; cursor: pointer; margin-bottom: 5px; font-weight:bold; }
.profile-nav button.active { background: var(--accent-color); color: white; border-color: var(--accent-color); }
.profile-content { padding: 20px; background: #0f172a; border-radius: 8px; border: 1px solid #334155; margin-top: 20px; }
.input-field { background: #0f172a; border: 1px solid #475569; color: white; padding: 12px; border-radius: 6px; width: 100%; margin-bottom: 10px; }

.pricing-table { width: 100%; border-collapse: collapse; margin-top: 20px; text-align: left; }
.pricing-table th, .pricing-table td { padding: 15px; border-bottom: 1px solid #334155; }
.pricing-table th { background-color: #0b1220; color: #f8fafc; font-weight: bold; }
.pricing-table tr:hover { background-color: #1e293b; }
.plan-name { font-weight: bold; color: var(--accent-color); }

.text-link { color: var(--accent-color); text-decoration: none; cursor: pointer; }
.text-link:hover { text-decoration: underline; }

.marquee-container { overflow: hidden; white-space: nowrap; width: 100%; position: relative; }
.marquee-content { display: inline-block; animation: marquee 25s linear infinite; padding-left: 100%; }
@keyframes marquee { 0% { transform: translateX(0%); } 100% { transform: translateX(-100%); } }

@media (max-width: 900px) {
    .grid { grid-template-columns: 1fr; }
    .nav-container { flex-direction: column; gap: 15px; padding: 15px; }
    .nav-links { flex-wrap: wrap; justify-content: center; width: 100%; }
    #auth-menu { justify-content: center; flex-wrap: wrap; width: 100%; }
    .toolbar { grid-template-columns: 1fr; }
    .profile-nav { flex-wrap: wrap; }
}