:root {
    --bg-deep: #050505;
    --bg-surface: #0d0d0d;
    --bg-card: #121212;
    --border: rgba(255, 255, 255, 0.08);
    --accent: #ef4444; /* Reaper Red */
    --accent-glow: rgba(239, 68, 68, 0.15);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --sidebar-width: 260px;
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    height: 100vh;
    overflow: hidden;
}

.app-container { display: flex; height: 100vh; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
}

.sidebar-header { padding: 0 1.5rem 2rem; }
.logo { display: flex; align-items: center; gap: 0.75rem; font-size: 1.25rem; font-weight: 800; }
.logo i { color: var(--accent); }

.sidebar-nav { flex: 1; padding: 0 0.75rem; }
.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
}

.nav-item.active { background: var(--accent-glow); color: var(--accent); }

/* Content */
.content { flex: 1; padding: 4rem; overflow-y: auto; }
.tool-section { display: none; max-width: 900px; margin: 0 auto; animation: fadeIn 0.4s ease-out; }
.tool-section.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.section-header { margin-bottom: 3rem; }
.section-header h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 0.5rem; }
.section-header p { color: var(--text-muted); font-size: 1.1rem; }

/* EXIF Reaper Styles */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 20px;
    padding: 4rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.02);
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.drop-zone i { width: 48px; height: 48px; color: var(--accent); margin-bottom: 1rem; }
.drop-zone p span { color: var(--accent); font-weight: 600; }

.file-list { margin-top: 2rem; display: grid; gap: 0.75rem; }
.file-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.actions-bar { margin-top: 2rem; display: flex; gap: 1rem; justify-content: center; }
.hidden { display: none; }

button {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

button.primary { background: var(--accent); border: none; color: black; }
button.large { padding: 1rem 2.5rem; font-size: 1rem; }

/* Sanitizer Styles */
.sanitizer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.pane { position: relative; height: 250px; }
textarea {
    width: 100%;
    height: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    outline: none;
}

.controls {
    display: flex;
    gap: 2rem;
    align-items: center;
    padding: 1rem;
    background: var(--bg-surface);
    border-radius: 12px;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.copy-float { position: absolute; top: 1rem; right: 1rem; padding: 0.5rem; }

/* Stegano Styles */
.stego-container { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.stego-card { background: var(--bg-card); border: 1px solid var(--border); padding: 2rem; border-radius: 16px; }
.stego-card h3 { margin-bottom: 1.5rem; }
.mini-drop { height: 150px; border: 1px dashed var(--border); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; background: rgba(255,255,255,0.02); }
.stego-card input { width: 100%; background: var(--bg-surface); border: 1px solid var(--border); padding: 0.75rem; border-radius: 8px; color: #fff; margin-bottom: 1.5rem; }

.reveal-box { background: var(--bg-surface); padding: 1rem; border-radius: 8px; margin-bottom: 1.5rem; font-family: monospace; color: var(--accent); }

/* Sidebar Footer */
.sidebar-footer { padding: 1.5rem; border-top: 1px solid var(--border); }
.back-link { display: flex; align-items: center; gap: 0.75rem; color: var(--text-muted); text-decoration: none; font-size: 0.85rem; }

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--accent);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transform: translateY(100px);
    transition: transform 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
    z-index: 10000;
}
.toast.show { transform: translateY(0); }