:root {
    --bg-color: #f0f4f1;
    --card-bg: #ffffff;
    --primary-color: #2e6930;
    --primary-hover: #235225;
    --border-color: #d1ded2;
    --text-color: #2c3e50;
    --shadow: 0 4px 6px rgba(46, 105, 48, 0.08);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card-bg);
    padding: 20px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-title i {
    font-size: 28px;
    color: var(--primary-color);
}

.header-title h1 {
    font-size: 24px;
    color: var(--primary-color);
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.btn:hover {
    background-color: var(--primary-hover);
}

/* Note Input Area */
.note-form {
    background: var(--card-bg);
    padding: 20px 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.note-form input, .note-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s;
}

.note-form input:focus, .note-form textarea:focus {
    border-color: var(--primary-color);
}

.note-form textarea {
    resize: vertical;
    min-height: 100px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* Notes Grid */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 15px;
}

.note-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 10px;
    word-break: break-word;
    position: relative;
}

.note-card h3 {
    font-size: 18px;
    color: var(--primary-color);
}

.note-card p {
    font-size: 14px;
    color: #555;
    white-space: pre-wrap;
    flex-grow: 1;
}

.note-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #888;
    border-top: 1px solid #eee;
    padding-top: 8px;
    margin-top: 5px;
}

.note-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: #777;
    transition: color 0.2s;
}

.action-btn.edit:hover {
    color: #007bff;
}

.action-btn.delete:hover {
    color: #dc3545;
}

.empty-state {
    text-align: center;
    color: #777;
    padding: 40px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}