:root {
    --bg-gradient: linear-gradient(135deg, #050811 0%, #0a0f1d 50%, #160a26 100%);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.07);
    --accent-glow: #8b5cf6;
    --neon-blue: #38bdf8;
    --text-color: #f8fafc;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', system-ui, sans-serif; }
html { font-size: clamp(14px, 0.8vw + 0.5rem, 28px); }

body { background: var(--bg-gradient); color: var(--text-color); min-height: 100vh; display: flex; flex-direction: column; }

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--glass-border);
    border-radius: 1.2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

.navbar { display: flex; justify-content: space-between; align-items: center; padding: 1.2rem 2.5rem; }
.logo { font-size: 2rem; font-weight: 900; background: linear-gradient(to right, #c084fc, var(--neon-blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.btn-action {
    background: linear-gradient(45deg, var(--accent-glow), #4f46e5); color: #fff; padding: 0.6rem 1.4rem; border-radius: 30px; border: none; font-weight: 600; cursor: pointer; transition: 0.3s;
}
.btn-action:hover { transform: translateY(-2px); box-shadow: 0 0 20px var(--accent-glow); }

.premium-badge {
    background: linear-gradient(45deg, #f59e0b, #d97706);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 1px;
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.6);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.notepad-container { display: grid; grid-template-columns: 350px 1fr; gap: 1.5rem; padding: 1.5rem; flex-grow: 1; }
.note-item { padding: 12px; margin-bottom: 10px; background: rgba(255,255,255,0.02); border-radius: 10px; border: 1px solid transparent; cursor: pointer; transition: 0.2s; }
.note-item:hover { border-color: var(--accent-glow); background: rgba(255,255,255,0.06); }

.toolbar-group { display: flex; gap: 0.8rem; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
.editor-input { background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border); color: #fff; padding: 0.6rem 1rem; border-radius: 10px; outline: none; }

.modal-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.85); backdrop-filter: blur(10px); z-index: 10000;
    align-items: center; justify-content: center;
}

body.zen-mode .navbar, 
body.zen-mode .sidebar-panel,
body.zen-mode .toolbar-group { display: none !important; }
body.zen-mode .notepad-container { grid-template-columns: 1fr; padding: 3rem 15vw; }
body.zen-mode .editor-card { background: transparent !important; border: none !important; box-shadow: none !important; }

.exit-zen-btn { display: none; position: fixed; top: 20px; right: 20px; z-index: 9999; }
body.zen-mode .exit-zen-btn { display: block; }

.ql-toolbar { border-color: var(--glass-border) !important; background: rgba(255,255,255,0.02); border-radius: 8px 8px 0 0; }
.ql-container { border-color: var(--glass-border) !important; height: 50vh; color: #fff; border-radius: 0 0 8px 8px; font-size: 1.1rem; }
.ql-stroke { stroke: #fff !important; }
.ql-fill { fill: #fff !important; }