@import url('https://fonts.googleapis.com/css2?family=M+PLUS+1p:wght@400;700;800&display=swap');
:root {
    color-scheme: light; --bg-color: #f0f4f8; --text-color: #1c1e21; --primary-color: #007bff;
    --secondary-color: #6c757d; --accent-color-1: #86A8E7; --accent-color-2: #91EAE4;
    --glass-bg: rgba(255, 255, 255, 0.5); --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1); --font-family: 'M PLUS 1p', sans-serif;
}
[data-theme="dark"] {
    color-scheme: dark; --bg-color: #0f172a; --text-color: #e2e8f0; --primary-color: #38bdf8;
    --secondary-color: #94a3b8; --accent-color-1: #4a00e0; --accent-color-2: #8e2de2;
    --glass-bg: rgba(30, 41, 59, 0.4); --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.2);
}
* { box-sizing: border-box; }
body {
    font-family: var(--font-family); background-color: var(--bg-color); color: var(--text-color);
    margin: 0; overflow-x: hidden; position: relative; transition: background-color 0.3s, color 0.3s;
}
.background-orb { position: fixed; border-radius: 50%; filter: blur(120px); z-index: -1; opacity: 0.25; }
#orb1 { width: 60vmax; height: 60vmax; top: -20vmax; left: -20vmax; background: radial-gradient(circle, var(--accent-color-1), transparent 60%); }
#orb2 { width: 70vmax; height: 70vmax; bottom: -30vmax; right: -30vmax; background: radial-gradient(circle, var(--accent-color-2), transparent 70%); }
#app-container { max-width: 1200px; margin: 0 auto; padding: 1rem; position: relative; z-index: 1; }
.page { display: none; }
.page.active { display: block; animation: fade-in-up 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) both; }
@keyframes fade-in-up { 0% { opacity: 0; transform: translateY(30px); } 100% { opacity: 1; transform: translateY(0); } }
.app-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; margin-bottom: 2rem; }
.app-header h1 { font-size: 2rem; font-weight: 800; margin: 0; }
.app-header h1 i { margin-right: 0.75rem; color: var(--primary-color); }
.header-controls { display: flex; align-items: center; gap: 1rem; }
.header-btn { font-family: var(--font-family); background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-color); font-size: 1rem; font-weight: 700; padding: 0.75rem 1.5rem; border-radius: 50px; cursor: pointer; transition: all 0.3s ease; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 6px var(--shadow-color); }
.header-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 15px var(--shadow-color); }
.theme-toggle { display: inline-flex; align-items: center; cursor: pointer; padding: 0.5rem; border-radius: 50px; background: var(--glass-bg); border: 1px solid var(--glass-border); backdrop-filter: blur(10px); }
.theme-toggle input { display: none; }
.theme-toggle .toggle-track { position: relative; display: flex; align-items: center; width: 2.5rem; height: 1.25rem; }
.theme-toggle i { font-size: 1rem; position: absolute; transition: opacity 0.3s ease; }
.theme-toggle .fa-sun { left: 0.2rem; opacity: 0; color: #f39c12; }
.theme-toggle .fa-moon { right: 0.2rem; opacity: 1; color: #f1c40f; }
[data-theme="dark"] .theme-toggle .fa-sun { opacity: 1; }
[data-theme="dark"] .theme-toggle .fa-moon { opacity: 0; }
.timetable-container {
    display: grid; grid-template-columns: 50px repeat(5, 1fr); gap: 0.75rem; padding: 1.5rem;
    background: var(--glass-bg); backdrop-filter: blur(20px); border: 1px solid var(--glass-border);
    border-radius: 1rem; box-shadow: 0 8px 32px 0 var(--shadow-color);
}
.day-header, .time-slot, .class-cell { font-weight: 800; text-align: center; padding: 0.75rem; border-radius: 0.75rem; display: flex; justify-content: center; align-items: center; }
.class-cell { border: 1px solid transparent; transition: all 0.3s ease; min-height: 100px; word-break: break-all; line-height: 1.3; }
.class-cell.filled { background: rgba(0, 0, 0, 0.03); border-color: rgba(0, 0, 0, 0.08); cursor: pointer; font-size: 0.9rem; }
[data-theme="dark"] .class-cell.filled { background: rgba(255, 255, 255, 0.05); border-color: var(--glass-border); }
.class-cell.filled:hover { transform: scale(1.05); border-color: var(--primary-color); background: var(--primary-color); color: white; }
.memo-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 992px) { .memo-grid { grid-template-columns: 400px 1fr; } }
.memo-left-column { position: sticky; top: 2rem; align-self: start; }
.glass-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: 1rem; padding: 2rem; margin-bottom: 2rem; backdrop-filter: blur(10px); }
.glass-card h2 { font-weight: 700; margin-top:0; margin-bottom: 1.5rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--glass-border); }
.glass-card h2 i { margin-right: 0.5em; }
#memo-form label:not(.file-upload-btn) { font-weight: 700; margin-bottom: 0.5rem; display: block; }
#memo-form select, #memo-form textarea, #memo-form input[type="text"], input[type="search"], #sort-order {
    width: 100%; background: rgba(0,0,0,0.1); border: 1px solid var(--glass-border); border-radius: 0.5rem;
    padding: 0.75rem; color: var(--text-color); margin-bottom: 1rem; font-family: var(--font-family); font-size: 1rem;
}
[data-theme="dark"] #memo-form select, [data-theme="dark"] #sort-order { background-color: #2c3e50; color: var(--text-color); }
.cta-button { width: 100%; padding: 1rem; font-size: 1.2rem; font-weight: 800; border: none; border-radius: 0.5rem; background: var(--primary-color); color: white; cursor: pointer; transition: all 0.3s ease; }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.secondary-btn { font-size: 1rem; font-weight: 700; padding: 0.75rem 1.5rem; border: none; border-radius: 8px; cursor: pointer; background: var(--secondary-color); color: white; }
.search-container { display: flex; gap: 0.5rem; align-items: center; }
.search-container #search-box { flex-grow: 1; }
.search-container #show-all-btn { flex-shrink: 0; padding: 0.75rem; }
.list-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.list-header h2 { margin: 0; }
.subject-group-header { font-weight: 800; font-size: 1.5rem; margin-top: 2rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--primary-color); }
.subject-memo-list { list-style: none; padding: 0; }
.subject-memo-list li { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--glass-border); border-radius: 0.75rem; padding: 1.5rem; margin-top: 1rem; }
.memo-header { display: flex; justify-content: space-between; align-items: center; padding-bottom: 0.75rem; margin-bottom: 0.75rem; border-bottom: 1px dashed var(--glass-border); }
.memo-header strong { font-size: 1.2rem; }
.memo-body { word-wrap: break-word; margin-bottom: 1rem; line-height: 1.7; }
.memo-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1rem; }
.memo-actions button { border: none; padding: 0.5rem 1rem; border-radius: 50px; font-weight: 700; cursor: pointer; }
.memo-actions .edit-btn { background: none; border: 1px solid var(--secondary-color); color: var(--text-color); }
.memo-actions .save-btn { background: var(--primary-color); color: white; }
.memo-actions .delete-btn { background-color: var(--secondary-color); color: white; }
textarea.edit-area { width: 100%; height: 120px; background: rgba(0,0,0,0.2); border: 1px solid var(--primary-color); color: var(--text-color); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hidden { display: none; }
.image-preview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 0.5rem; margin-top: 1rem; }
.preview-item { position: relative; }
.preview-item img { width: 100%; height: 80px; object-fit: cover; border-radius: 8px; }
.preview-item .remove-preview-btn { position: absolute; top: -5px; right: -5px; width: 24px; height: 24px; border-radius: 50%; background: rgba(0,0,0,0.6); color: white; border: 2px solid white; cursor: pointer; display: flex; justify-content: center; align-items: center; font-size: 14px; line-height: 1; }
.memo-image-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 0.5rem; margin-top: 1rem; }
.memo-image { width: 100%; height: 100px; object-fit: cover; border-radius: 8px; cursor: pointer; }
.file-upload-btn { display: inline-block; padding: 0.75rem 1.5rem; background: var(--secondary-color); color: white; border-radius: 8px; cursor: pointer; font-weight: 700; margin-bottom: 1rem; text-align: center; }
.file-upload-btn:hover { opacity: 0.9; }
.file-upload-btn i { margin-right: 0.5em; }
.file-upload-btn input[type="file"] { display: none; }
@media (max-width: 600px) {
    .app-header h1 { font-size: 1.5rem; }
    .header-btn { font-size: 0.9rem; padding: 0.5rem 1rem; }
    .timetable-container { grid-template-columns: 30px repeat(5, 1fr); gap: 0.5rem; padding: 0.5rem; font-size: 12px; }
    .class-cell { min-height: 80px; padding: 4px; font-size: 10.5px; }
    .memo-grid { grid-template-columns: 1fr; }
}