* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
}

body {
    background: #1b1b1f;
    color: #fff;
    overflow: hidden;
    position: relative;
    height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    padding-bottom: env(safe-area-inset-bottom);
}

body.light {
    background: #f4f4f7;
    color: #222;
}

#bgCanvas {
    position: fixed;
    inset: 0;
    z-index: 0;
}

#controls {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 1000;
}

#controls button {
    padding: 8px 14px;
    border-radius: 14px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    background: #2a2a2f;
    color: #fff;
    transition: transform 0.15s ease;
}

#controls button:active {
    transform: scale(0.96);
}

#notesContainer {
    position: relative;
    width: 100%;
    height: 100%;
    padding-top: 70px;
}

.note {
    position: absolute;
    width: 240px;
    min-height: 150px;
    background: linear-gradient(145deg, #fff8b0, #ffeaa0);
    border-radius: 18px;
    padding: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,.4);
    display: flex;
    flex-direction: column;
    cursor: grab;
    overflow: hidden;
    color: #000;
    touch-action: none;
}

.note.dragging {
    transform: scale(1.05);
}

.note.pinned {
    border: 2px solid #c8b560;
}

.note .top-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    margin-bottom: 6px;
}

.note .top-buttons button {
    padding: 6px 8px;
    border-radius: 8px;
    border: none;
    font-size: 12px;
    background: rgba(0,0,0,.12);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.note .top-buttons button:active {
    transform: scale(0.95);
}

.note textarea {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    font-size: 15px;
    color: inherit;
}

.resize-handle {
    position: absolute;
    right: 6px;
    bottom: 6px;
    width: 20px;
    height: 20px;
    background: rgba(0,0,0,.25);
    border-radius: 6px;
    cursor: nwse-resize;
}

.note.minimized textarea {
    display: none;
}

.note.minimized .resize-handle {
    display: none;
}

@media (max-width: 600px) {

    body {
        overflow: auto;
    }

    #controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    #notesContainer {
        padding-top: 150px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 14px;
    }

    .note {
        position: relative !important;
        width: 90vw;
        max-width: 360px;
        left: auto !important;
        top: auto !important;
        cursor: default;
        margin: 0 auto;
    }

    .resize-handle {
        width: 28px;
        height: 28px;
    }

    .note .top-buttons button {
        font-size: 13px;
        padding: 8px 10px;
    }

    .note textarea {
        font-size: 16px;
    }
}