:root {
    --bg-color: #141e30; --card-bg: #1e293b; --card-hover: #2c3e50;
    --text-primary: #ffffff; --text-secondary: #94a3b8;
    --accent-green: #10b981; --accent-green-hover: #059669;
    --accent-red: #ef4444; --accent-red-hover: #dc2626;
    --accent-blue: #3b82f6; --accent-blue-hover: #2563eb;
    --accent-purple: #8b5cf6; --accent-purple-hover: #7c3aed;
    --accent-orange: #f97316; --accent-orange-hover: #ea580c;
    --accent-yellow: #eab308; --accent-yellow-hover: #ca8a04;
    --accent-teal: #14b8a6; --accent-teal-hover: #0d9488;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-primary); min-height: 100vh; display: flex; flex-direction: column; align-items: center; }
header { width: 100%; max-width: 1100px; padding: 2rem; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.5rem; text-decoration: none; color: inherit; cursor: pointer; }
.logo-icon { background: var(--accent-green); padding: 5px; border-radius: 8px; display: flex; align-items: center; justify-content: center; }

.hero { text-align: center; margin: 3rem 0; padding: 0 1rem; }
.hero h1 { font-size: 2.5rem; margin-bottom: 1rem; }
.hero p { color: var(--text-secondary); }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; width: 100%; max-width: 1100px; padding: 0 2rem; margin-bottom: 4rem; }
.tool-card { text-decoration: none; background-color: var(--card-bg); border-radius: 12px; padding: 2rem; cursor: pointer; transition: all 0.2s ease; border: 1px solid rgba(255, 255, 255, 0.05); display: flex; flex-direction: column; gap: 12px; color: inherit; text-align: left; width: 100%; outline: none; }
.tool-card:active { background-color: var(--card-hover); transform: scale(0.98); }
.tool-card:hover { border-color: var(--accent-green); }
.tool-card i { color: var(--text-secondary); margin-bottom: 10px; }
.tool-card h3 { font-size: 1.2rem; font-weight: 600; }
.tool-card p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.5; }

/* Ocultação segura para inputs de ficheiro no Android WebView */
.visual-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
    opacity: 0 !important;
}

.workspace { display: flex; width: 100%; max-width: 800px; padding: 2rem; background-color: var(--card-bg); border-radius: 12px; border: 1px dashed var(--text-secondary); text-align: center; margin-bottom: 4rem; flex-direction: column; align-items: center; gap: 20px; }
.btn-action { background-color: var(--accent-green); color: white; border: none; padding: 12px 24px; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background 0.3s; display: flex; align-items: center; gap: 10px; justify-content: center; text-decoration: none;}
.btn-action:hover { background-color: var(--accent-green-hover); }
.btn-action.btn-red { background-color: var(--accent-red); } .btn-action.btn-red:hover { background-color: var(--accent-red-hover); }
.btn-action.btn-blue { background-color: var(--accent-blue); } .btn-action.btn-blue:hover { background-color: var(--accent-blue-hover); }
.btn-action.btn-purple { background-color: var(--accent-purple); } .btn-action.btn-purple:hover { background-color: var(--accent-purple-hover); }
.btn-action.btn-orange { background-color: var(--accent-orange); } .btn-action.btn-orange:hover { background-color: var(--accent-orange-hover); }
.btn-action.btn-yellow { background-color: var(--accent-yellow); color: #000; } .btn-action.btn-yellow:hover { background-color: var(--accent-yellow-hover); }
.btn-action.btn-pink { background-color: var(--accent-pink); } .btn-action.btn-pink:hover { background-color: var(--accent-pink-hover); }
.btn-action.btn-teal { background-color: var(--accent-teal); } .btn-action.btn-teal:hover { background-color: var(--accent-teal-hover); }
.btn-action:disabled { background-color: #475569 !important; cursor: not-allowed; color: #cbd5e1 !important; }

.file-info-box { text-align: left; width: 100%; max-width: 600px; background: rgba(0,0,0,0.2); padding: 1.5rem; border-radius: 8px; font-size: 0.9rem; color: var(--text-secondary); display: flex; flex-direction: column; gap: 10px; }
.input-text, .input-select { width: 100%; padding: 10px 12px; border-radius: 6px; border: 1px solid var(--text-secondary); background-color: var(--bg-color); color: var(--text-primary); font-size: 1rem; outline: none; transition: border-color 0.3s; margin-top: 5px; }
.input-text:focus, .input-select:focus { border-color: var(--accent-green); }
.btn-voltar { background: transparent; color: var(--text-secondary); border: 1px solid var(--text-secondary); padding: 8px 16px; border-radius: 6px; cursor: pointer; margin-bottom: 20px; transition: all 0.2s; text-decoration: none; }
.btn-voltar:hover { color: white; border-color: white; }

.sortable-list { list-style: none; width: 100%; display: flex; flex-direction: column; gap: 12px; margin-top: 10px; max-height: 400px; overflow-y: auto; padding-right: 8px; }
.draggable-item { background-color: var(--bg-color); border: 1px solid rgba(255, 255, 255, 0.1); padding: 10px; border-radius: 8px; color: white; display: flex; justify-content: flex-start; align-items: center; cursor: grab; user-select: none; gap: 20px; transition: transform 0.2s; }
.draggable-item:active { cursor: grabbing; transform: scale(0.98); }
.draggable-item.dragging { opacity: 0.5; background-color: var(--card-hover); border-color: var(--accent-purple); }
.drag-handle { color: var(--text-secondary); display: flex; align-items: center; margin-left: auto; cursor: grab; }
.page-thumbnail { height: 80px; background-color: white; border-radius: 4px; box-shadow: 0 2px 5px rgba(0,0,0,0.3); pointer-events: none; }
.page-number-text { font-size: 1.1rem; font-weight: 600; }

footer { margin-top: auto; padding: 2rem; font-size: 0.8rem; color: var(--text-secondary); display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; text-transform: uppercase; letter-spacing: 1px; text-align: center; }
.status-dot { color: var(--accent-green); margin-right: 5px; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.spin { animation: spin 1s linear infinite; }

/* --- FUNDO DE PARTÍCULAS ESTILO NEBULOSA --- */
.bubble-container { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; overflow: hidden; pointer-events: none; }
.bubble { position: absolute; bottom: -50px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); box-shadow: 0 0 8px rgba(255, 255, 255, 0.05); filter: blur(3px); opacity: 0; animation: floatUp linear infinite; }
@keyframes floatUp { 0% { transform: translateY(0) scale(0.8); opacity: 0; } 20% { opacity: 1; } 80% { opacity: 1; } 100% { transform: translateY(-120vh) scale(1.2); opacity: 0; } }

@media (max-width: 768px) { 
    header { flex-direction: column; gap: 0.5rem; padding: 1.5rem 1rem 0.5rem 1rem !important; } 
    .hero { margin: 1rem 0 1.5rem 0 !important; padding: 0 1rem; }
    .hero h1 { font-size: 1.5rem !important; margin-bottom: 0.5rem !important; }
    .hero p { font-size: 0.85rem !important; line-height: 1.3; padding: 0 10px; }
    .tools-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; padding: 0 1rem; margin-bottom: 2rem !important; }
    .tool-card { padding: 1.2rem 0.5rem !important; align-items: center; text-align: center; }
    .tool-card h3 { font-size: 0.9rem !important; margin-top: 5px; }
    .tool-card i { margin-bottom: 5px !important; width: 28px; height: 28px; }
    .tool-card p { display: none !important; }
    .workspace { padding: 1.5rem 1rem; border: none; background-color: transparent; }
}