/* ==========================================
   🌌 AstroCal Pro - Minimalist Aurora Theme
   ========================================== */
:root {
    /* Soft Dark Navy & Pastels for High Readability */
    --bg-dark: #080c16;
    --bg-aurora-glow: radial-gradient(circle at 50% -20%, rgba(100, 255, 218, 0.08), rgba(123, 97, 255, 0.05), transparent 70%);
    
    --bg-card: rgba(18, 24, 43, 0.85);
    --bg-card-hover: rgba(26, 34, 60, 0.95);
    --border-color: rgba(255, 255, 255, 0.12);
    --border-active: rgba(123, 97, 255, 0.5);
    
    /* Elegant Pastel Colors (No Harsh Neons) */
    --color-primary: #86a5ff;     /* Soft Blue-purple */
    --color-secondary: #64ffda;   /* Mint Green */
    --color-accent: #ffb454;      /* Soft Gold Moon */
    --color-pink: #ff85a7;        /* Soft Coral Red */
    
    /* Text Levels */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    /* Calendar Days & Highlighter Marker Color Map */
    --sun-red: #f87171;
    --sat-blue: #60a5fa;
    --marker-green-bg: rgba(100, 255, 218, 0.18);
    --marker-green-border: rgba(100, 255, 218, 0.5);
    --marker-pink-bg: rgba(255, 133, 167, 0.18);
    --marker-pink-border: rgba(255, 133, 167, 0.5);
    --marker-yellow-bg: rgba(255, 180, 84, 0.18);
    --marker-yellow-border: rgba(255, 180, 84, 0.5);
    
    --transition-standard: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    background-image: var(--bg-aurora-glow);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: 'Outfit', 'Noto Sans KR', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ⭐ Subtle Background Twinkling */
.stars-bg, .twinkling {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: -2;
    pointer-events: none;
    opacity: 0.3;
}

.stars-bg {
    background: #000 url('https://www.script-tutorials.com/demos/360/images/stars.png') repeat top center;
}

.twinkling {
    background: transparent url('https://www.script-tutorials.com/demos/360/images/twinkling.png') repeat top center;
    z-index: -1;
    animation: move-twink-back 240s linear infinite;
}

@keyframes move-twink-back {
    from { background-position: 0 0; }
    to { background-position: -10000px 5000px; }
}

/* Dimmed App Overlay Backdrop */
.app-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    z-index: 80;
    opacity: 1;
    transition: opacity 0.3s ease;
}
.app-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

/* ==========================================
   📦 Layout Structure (Drawer Panels)
   ========================================== */
.app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
    max-width: 100%;
    position: relative;
}

/* Left Sidebar - Sliding Drawer */
.sidebar-left {
    position: fixed;
    top: 0;
    left: 0;
    width: 290px;
    height: 100vh;
    background: rgba(11, 16, 31, 0.98);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
    z-index: 100;
    transform: translateX(0);
    transition: var(--transition-standard);
    box-shadow: 10px 0 30px rgba(0,0,0,0.5);
}
.sidebar-left.drawer-hidden {
    transform: translateX(-100%);
    box-shadow: none;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}
.sidebar-header .logo { font-size: 1.8rem; }
.sidebar-header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}
.sidebar-header h1 span {
    font-size: 0.7rem;
    background: rgba(134, 165, 255, 0.15);
    color: var(--color-primary);
    border: 1px solid rgba(134, 165, 255, 0.3);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    vertical-align: middle;
}

/* Right Sidebar - Sliding Drawer Panel */
.sidebar-right {
    position: fixed;
    top: 0;
    right: 0;
    width: 420px;
    height: 100vh;
    background: rgba(12, 17, 33, 0.98);
    border-left: 1px solid var(--border-color);
    padding: 1.8rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    overflow-y: auto;
    z-index: 100;
    transform: translateX(0);
    transition: var(--transition-standard);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
}
.sidebar-right.drawer-hidden {
    transform: translateX(100%);
    box-shadow: none;
}

/* Central Main Content (Always spans full screen width) */
.main-content {
    flex: 1;
    width: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    overflow-y: auto;
    transition: padding 0.3s ease;
}

/* Cards (Standard Container panels) */
.info-card, .legend-card, .sync-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    transition: var(--transition-standard);
}
.info-card h3, .legend-card h3, .sync-section h3 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    font-weight: 600;
}
.info-card p, .sync-section p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.8rem;
}
.legend-card { display: flex; flex-direction: column; gap: 0.5rem; }
.legend-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.82rem; color: var(--text-secondary); }

/* Marker Pastel Highlights */
.marker-tag {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 3px;
}
.marker-green { background-color: var(--marker-green-bg); border: 1px solid var(--marker-green-border); }
.marker-pink { background-color: var(--marker-pink-bg); border: 1px solid var(--marker-pink-border); }
.marker-yellow { background-color: var(--marker-yellow-bg); border: 1px solid var(--marker-yellow-border); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-standard);
    border: 1px solid transparent;
    font-size: 0.88rem;
    font-family: inherit;
    gap: 0.4rem;
}
.btn-primary { background: var(--color-primary); color: #05070f; }
.btn-primary:hover { background: #a3bcff; transform: translateY(-1px); }
.btn-secondary { background: rgba(255, 255, 255, 0.05); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--text-secondary); }
.btn-danger { background: rgba(248, 113, 113, 0.15); color: var(--sun-red); border: 1px solid rgba(248, 113, 113, 0.3); }
.btn-danger:hover { background: rgba(248, 113, 113, 0.25); }
.btn-tiny { padding: 0.3rem 0.8rem; font-size: 0.78rem; border-radius: 4px; background: rgba(134, 165, 255, 0.15); color: var(--color-primary); border: 1px solid rgba(134, 165, 255, 0.3); }
.btn-tiny:hover { background: rgba(134, 165, 255, 0.25); }
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-icon:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--color-primary); }

/* ==========================================
   📅 Main Monthly Calendar
   ========================================== */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.month-selector { display: flex; align-items: center; gap: 0.8rem; }
.month-selector h2 { font-family: 'Orbitron', sans-serif; font-size: 1.5rem; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 0.6rem; }

/* Filter Switch Toggle */
.filter-switch-container {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.filter-label { font-size: 0.8rem; color: var(--text-secondary); font-weight: 500; }
.switch { position: relative; display: inline-block; width: 34px; height: 18px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(255, 255, 255, 0.15); transition: .3s; }
.slider:before { position: absolute; content: ""; height: 12px; width: 12px; left: 3px; bottom: 3px; background-color: white; transition: .3s; }
input:checked + .slider { background-color: var(--color-primary); }
input:checked + .slider:before { transform: translateX(16px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }

/* Calendar Grid */
.calendar-grid-container {
    flex: 1;
    background: rgba(14, 20, 36, 0.85);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.weekdays-grid { display: grid; grid-template-columns: repeat(7, 1fr); text-align: center; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
.weekday { font-weight: 600; font-size: 0.82rem; color: var(--text-secondary); }
.weekday.sun { color: var(--sun-red); }
.weekday.sat { color: var(--sat-blue); }

.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-auto-rows: minmax(95px, 1fr);
    gap: 0.4rem;
    flex: 1;
}

/* Day Cell */
.day-cell {
    background: rgba(22, 29, 52, 0.55);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-standard);
}
.day-cell:hover { background: rgba(28, 38, 68, 0.85); border-color: var(--color-primary); }
.day-cell.today { border-color: var(--color-secondary); background: rgba(100, 255, 218, 0.04); }
.day-cell.today .solar-date { color: var(--color-secondary); font-weight: 700; }
.day-cell.other-month { opacity: 0.22; }

/* Day Cell Drop Zone Outline */
.day-cell.drag-enter {
    border: 2px dashed var(--color-secondary) !important;
    background: rgba(100, 255, 218, 0.08) !important;
}

.day-header { display: flex; justify-content: space-between; align-items: baseline; }
.solar-date { font-weight: 600; font-size: 1rem; color: var(--text-primary); }
.sun .solar-date { color: var(--sun-red); }
.sat .solar-date { color: var(--sat-blue); }
.lunar-date { font-size: 0.68rem; color: var(--text-muted); }

/* Minimal Moon Phase Icon */
.moon-phase { font-size: 1.3rem; align-self: center; margin: 0.1rem 0; }
.day-cell:hover .moon-phase { transform: scale(1.15); }

/* Sticker display slots in calendar cell */
.cell-stickers-container {
    display: flex;
    justify-content: center;
    gap: 2px;
    margin: 1px 0;
    min-height: 18px;
}
.sticker-item-cell {
    font-size: 1.1rem;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
    user-select: none;
}

/* Event List in Cell */
.day-events { display: flex; flex-direction: column; gap: 2px; max-height: 48px; overflow-y: auto; }
.event-badge {
    font-size: 0.7rem;
    padding: 1px 4px;
    border-radius: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 2px;
}
.event-badge.meteor {
    background: rgba(100, 255, 218, 0.08);
    color: var(--color-secondary);
    border: 1px solid rgba(100, 255, 218, 0.15);
}
.event-badge.personal.green-marker { background-color: var(--marker-green-bg); border-left: 3px solid var(--marker-green-border); color: #cbfdf1; }
.event-badge.personal.pink-marker { background-color: var(--marker-pink-bg); border-left: 3px solid var(--marker-pink-border); color: #ffd6e1; }
.event-badge.personal.yellow-marker { background-color: var(--marker-yellow-bg); border-left: 3px solid var(--marker-yellow-border); color: #ffe6c7; }

/* ==========================================
   📝 Right Sidebar - Sketch Layout Components
   ========================================== */
.day-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.8rem;
}
.detail-header-btns {
    display: flex;
    gap: 0.5rem;
}
.detail-date-box h2 { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); }
.lunar-date-sub { font-size: 0.8rem; color: var(--text-muted); }

/* Spaced out split cards */
.detail-split-row {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.today-is-card, .todo-list-card, .timeline-scheduler-card, .astro-forecast-card {
    background: rgba(22, 29, 52, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.card-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
    padding-bottom: 0.4rem;
}

/* 🔭 NOAA Forecast Panel */
.astro-forecast-card .card-title { color: var(--color-secondary); }
.astro-forecast-content { font-size: 0.78rem; display: flex; flex-direction: column; gap: 0.35rem; }
.forecast-row { display: flex; justify-content: space-between; align-items: center; }
.forecast-label { color: var(--text-muted); }
.forecast-value { color: var(--text-primary); font-weight: 500; }
.stargazing-bar-outer { background: rgba(255,255,255,0.06); height: 5px; border-radius: 2px; width: 60px; display: inline-block; vertical-align: middle; overflow: hidden; margin-left: 5px;}
.stargazing-bar-inner { background: var(--color-secondary); height: 100%; border-radius: 2px; }

/* 2-1) Today is... (감정 스티커 & 소감란) */
.today-is-card {
    border-style: dashed;
}
.today-is-card.drag-enter {
    border-color: var(--color-secondary);
    background: rgba(100, 255, 218, 0.05);
}
.today-sticker-slot {
    min-height: 52px;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0.5rem;
    font-size: 1.8rem;
    border: 1px dashed rgba(255, 255, 255, 0.1);
    position: relative;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.today-sticker-slot:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--color-primary);
}
.today-sticker-slot .delete-sticker-btn {
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: 0.8rem;
    background: none;
    border: none;
    color: var(--sun-red);
    cursor: pointer;
    display: none;
}
.today-sticker-slot:hover .delete-sticker-btn {
    display: block;
}
.sticker-placeholder {
    font-size: 0.72rem;
    color: var(--text-muted);
}
#detail-one-line-diary {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.4rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.8rem;
    resize: none;
}
#detail-one-line-diary:focus { border-color: var(--color-primary); outline: none; }

/* 2-2) To do list (체크리스트) */
.todo-progress-bar { background: rgba(255,255,255,0.06); height: 4px; border-radius: 2px; overflow: hidden; margin-bottom: 0.2rem;}
#todo-progress-fill { background: var(--color-primary); height: 100%; transition: width 0.3s ease; }
.todo-ul { list-style: none; display: flex; flex-direction: column; gap: 0.35rem; max-height: 140px; overflow-y: auto; padding-right: 2px; }
.todo-li { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; padding: 2px 0; border-bottom: 1px solid rgba(255,255,255,0.03); }
.todo-li-left { display: flex; align-items: center; gap: 0.4rem; }
.todo-li-left input[type="checkbox"] { accent-color: var(--color-primary); cursor: pointer; }
.todo-li-left.completed span { text-decoration: line-through; color: var(--text-muted); }
.btn-delete-todo { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.9rem; transition: var(--transition-standard); }
.btn-delete-todo:hover { color: var(--sun-red); }
.todo-input-row { display: flex; gap: 4px; margin-top: 0.4rem; }
#input-new-todo { flex: 1; background: rgba(0, 0, 0, 0.25); border: 1px solid var(--border-color); border-radius: 4px; padding: 0.35rem; color: var(--text-primary); font-size: 0.78rem; }
#input-new-todo:focus { outline: none; border-color: var(--color-primary); }
#btn-add-todo { background: var(--color-primary); border: none; color: #05070f; border-radius: 4px; padding: 0 0.6rem; cursor: pointer; font-weight: 700; font-size: 0.9rem; }

/* 2-3) Time Timeline Scheduler */
.timeline-container-scroll {
    max-height: 190px; /* 콤팩트한 190px 높이로 축소 */
    overflow-y: auto;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding-right: 4px;
}
.timeline-ruler {
    position: relative;
    height: 456px; /* 19시간 * 24px = 456px */
    width: 100%;
}
/* Hour marking line */
.hour-row {
    position: absolute;
    left: 0;
    width: 100%;
    height: 24px; /* 24px 높이로 축소 */
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background 0.15s ease;
}
.hour-row:hover {
    background: rgba(255, 255, 255, 0.04);
}
.hour-label {
    width: 45px;
    font-size: 0.68rem;
    color: var(--text-muted);
    padding-left: 0.4rem;
    user-select: none;
}
.hour-line {
    flex: 1;
    height: 1px;
}
/* Absolute positioned schedule block on timeline */
.timeline-block {
    position: absolute;
    left: 55px;
    right: 8px;
    border-radius: 5px;
    padding: 0.15rem 0.4rem; /* 높이가 좁아진 공간에 맞춰 패딩 축소 */
    font-size: 0.72rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center; /* 24px 높이에 맞게 세로 중앙 정렬 */
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}
.timeline-block:hover {
    transform: translateY(-0.5px);
    filter: brightness(1.15);
}
.timeline-block.green-marker { background: var(--marker-green-bg); border-left: 4px solid var(--marker-green-border); color: #cbfdf1; }
.timeline-block.pink-marker { background: var(--marker-pink-bg); border-left: 4px solid var(--marker-pink-border); color: #ffd6e1; }
.timeline-block.yellow-marker { background: var(--marker-yellow-bg); border-left: 4px solid var(--marker-yellow-border); color: #ffe6c7; }
.timeline-block .block-time { font-size: 0.62rem; opacity: 0.75; margin-top: 1px; }

/* ==========================================
   🎨 Sticker Palette (Slide-up footer bar)
   ========================================== */
.sticker-palette-container {
    position: fixed;
    bottom: -220px; /* Hidden state */
    left: 0;
    width: 100vw;
    height: 220px;
    background: rgba(11, 15, 28, 0.97);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 30px rgba(0,0,0,0.5);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: bottom 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.sticker-palette-container.active {
    bottom: 0;
}
.palette-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1.6rem;
    border-bottom: 1px solid var(--border-color);
}
.palette-header h3 { font-size: 0.95rem; color: var(--color-primary); }
.palette-body {
    padding: 0.8rem 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    flex: 1;
    overflow: hidden;
}
.sticker-tabs { display: flex; gap: 4px; }
.sticker-tab-btn {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition-standard);
}
.sticker-tab-btn.active, .sticker-tab-btn:hover {
    background: var(--color-primary);
    color: #05070f;
    border-color: transparent;
}
.sticker-list {
    display: flex;
    gap: 1.2rem;
    overflow-x: auto;
    padding: 0.4rem 0.2rem;
    flex: 1;
    align-items: center;
}
.sticker-item {
    font-size: 2.2rem;
    cursor: grab;
    user-select: none;
    transition: transform 0.15s ease;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}
.sticker-item:hover { transform: scale(1.2); }
.sticker-item:active { cursor: grabbing; }

/* ==========================================
   💬 Modal (Clean Dark Layout) & Tabs
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(6, 8, 16, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-standard);
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content {
    background: #0f1424;
    border: 1px solid var(--border-color);
    width: 480px;
    max-width: 90%;
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    transform: scale(0.95);
    transition: var(--transition-standard);
}
.modal-overlay.active .modal-content { transform: scale(1); }

.modal-header {
    padding: 0.8rem 1.4rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-tabs { display: flex; gap: 4px; }
.modal-tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    border-bottom: 2px solid transparent;
    transition: var(--transition-standard);
    font-family: inherit;
}
.modal-tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.btn-close { background: none; border: none; color: var(--text-muted); font-size: 1.6rem; cursor: pointer; }
.btn-close:hover { color: var(--text-primary); }

.modal-body { padding: 1.4rem; }
.modal-form-panel { display: flex; flex-direction: column; gap: 0.8rem; }

.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; }
.checkbox-group { flex-direction: row; align-items: center; padding: 0.2rem 0; }
.checkbox-label { display: flex; align-items: center; gap: 0.4rem; font-size: 0.82rem; cursor: pointer; color: var(--text-secondary); }
.checkbox-label input { accent-color: var(--color-primary); }

label { font-size: 0.8rem; color: var(--text-secondary); font-weight: 500; }
input[type="text"], input[type="time"], select, textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.55rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.88rem;
}
input[type="text"]:focus, input[type="time"]:focus, select:focus, textarea:focus { border-color: var(--color-primary); outline: none; }

/* Marker Picker Styles */
.marker-color-picker, .memo-color-picker { display: flex; gap: 8px; margin-top: 0.2rem; }
.marker-picker-item, .memo-color-item {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid rgba(255,255,255,0.05);
}
.marker-picker-item input, .memo-color-item input { opacity: 0; width: 0; height: 0; position: absolute; }
.picker-check { display: none; width: 8px; height: 8px; border-radius: 50%; background-color: var(--text-primary); }
input:checked + .picker-check { display: block; }

/* Observing Log Subfields */
.observing-fields {
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: 0.4rem;
}

/* Memo Board inside Modal */
.existing-memos-section { margin-top: 0.8rem; border-top: 1px solid var(--border-color); padding-top: 0.8rem; }
.existing-memos-section h4 { font-size: 0.82rem; color: var(--color-primary); margin-bottom: 0.4rem; }
.memo-boards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    max-height: 120px;
    overflow-y: auto;
}
.memo-pin-card {
    background: #ffe066;
    color: #333;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.78rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
    position: relative;
    min-height: 48px;
    word-break: break-all;
}
.memo-pin-card .btn-delete-memo {
    position: absolute;
    top: 2px;
    right: 4px;
    background: none;
    border: none;
    color: #ff4d4d;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.95rem;
}

.modal-footer { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1rem; }
.modal-footer .btn { width: auto; }
.hidden { display: none !important; }

/* ==========================================
   📱 Responsive Layout Adjustments & Mobile Drawer
   ========================================== */
@media (max-width: 1100px) {
    .sidebar-right {
        width: 360px;
    }
}

/* Tablet & Mobile Layout Rules (max-width: 768px) */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    /* Left Sidebar becomes a mobile drawer overlay */
    .sidebar-left {
        width: 80%;
        max-width: 300px;
        box-shadow: 5px 0 15px rgba(0,0,0,0.5);
        z-index: 1010;
    }

    /* Right Sidebar becomes bottom sheet */
    .sidebar-right {
        left: 0;
        right: 0;
        bottom: 0;
        top: auto;
        width: 100vw;
        height: 82vh;
        border-radius: 20px 20px 0 0;
        border-left: none;
        border-top: 1px solid var(--border-color);
        transform: translateY(0);
        box-shadow: 0 -10px 25px rgba(0,0,0,0.5);
        z-index: 1010;
    }
    
    /* 모바일에서 스티커 팔레트가 상세 시트보다 위에 뜨도록 보장 */
    .sticker-palette-container {
        z-index: 1020;
    }
    
    .sidebar-right.drawer-hidden {
        transform: translateY(100%);
        box-shadow: none;
    }
    
    .detail-split-row {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .main-content {
        padding: 0.8rem;
    }

    /* 헤더 구성 요소 찌그러짐 방지 및 정렬 최적화 */
    .calendar-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.6rem;
    }
    .month-selector {
        width: 100%;
        justify-content: space-between;
    }
    .month-selector h2 {
        font-size: 1.25rem;
    }
    .header-actions {
        width: 100%;
        justify-content: flex-end;
        flex-wrap: wrap;
        gap: 0.4rem;
    }
    .header-actions .btn {
        padding: 0.45rem 0.8rem;
        font-size: 0.78rem;
        gap: 0.25rem;
    }
    .filter-switch-container {
        padding: 0.3rem 0.6rem;
    }

    /* 달력 본체 모바일 최적화 (가로 삐져나감 방지) */
    .calendar-grid-container {
        padding: 0.5rem;
        width: 100%;
        box-sizing: border-box;
    }
    .weekdays-grid {
        padding-bottom: 0.3rem;
    }
    .weekday {
        font-size: 0.72rem;
    }
    .days-grid {
        grid-auto-rows: minmax(68px, 1fr);
        gap: 0.2rem;
        width: 100%;
    }
    .day-cell {
        padding: 0.25rem;
        min-width: 0; /* 그리드 아이템의 가로폭 강제 확장 차단 */
    }
    .solar-date {
        font-size: 0.82rem;
    }
    .lunar-date {
        font-size: 0.58rem;
    }
    .moon-phase {
        font-size: 0.85rem;
        margin: 0.05rem 0;
    }
    .cell-stickers-container {
        min-height: 14px;
        margin: 0;
    }
    .sticker-item-cell {
        font-size: 0.8rem;
    }
    .day-events {
        max-height: 34px;
    }
    .event-badge {
        font-size: 0.6rem;
        padding: 0px 2px;
        border-radius: 2px;
    }

    /* Mobile Keyboard Avoidance Class (triggered via JS on input focus) */
    .sidebar-right.keyboard-avoid {
        padding-bottom: 320px !important;
        transition: padding-bottom 0.15s ease-out;
    }
}

/* ==========================================
   🔭 Floating Astro Tooltip Style
   ========================================== */
.astro-tooltip {
    position: absolute;
    z-index: 10000;
    background: rgba(11, 16, 32, 0.96);
    border: 1px solid var(--border-active);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--text-secondary);
    font-size: 0.78rem;
    pointer-events: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    transition: opacity 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    width: 220px;
}
.astro-tooltip.hidden { display: none !important; }
.astro-tooltip .tooltip-header { font-size: 0.82rem; font-weight: 700; color: var(--color-secondary); border-bottom: 1px dashed rgba(255, 255, 255, 0.08); padding-bottom: 0.3rem; margin-bottom: 0.2rem; }
.astro-tooltip .tooltip-row { display: flex; justify-content: space-between; }
.astro-tooltip .tooltip-label { color: var(--text-muted); }
.astro-tooltip .tooltip-value { color: var(--text-primary); font-weight: 500; }

/* ==========================================
   🌙 Date and Moon Mini Phase Style
   ========================================== */
.date-and-moon { display: inline-flex; align-items: center; gap: 4px; }
.date-and-moon .moon-phase { font-size: 1rem; vertical-align: middle; filter: drop-shadow(0 1px 2px rgba(255, 255, 255, 0.15)); transition: var(--transition-standard); margin: 0; line-height: 1; }
.day-cell:hover .date-and-moon .moon-phase { transform: scale(1.2) rotate(10deg); }

/* ==========================================
   🎮 Interactive Tour & Profile Styles
   ========================================== */
.tutorial-popover {
    position: absolute;
    z-index: 100001;
    background: #0f1424;
    border: 2px solid var(--color-primary);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 12px;
    max-width: 260px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    pointer-events: auto;
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.tutorial-popover.hidden {
    display: none !important;
}
.tutorial-popover-content {
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text-secondary);
}
.tutorial-popover-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 0.5rem;
}
.btn-tutorial-nextbtn {
    background: var(--color-primary);
    border: none;
    color: #05070f;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
}
.btn-tutorial-nextbtn:hover {
    background: #a3bcff;
}
.btn-tutorial-subbtn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.72rem;
    cursor: pointer;
}
.btn-tutorial-subbtn:hover {
    color: var(--sun-red);
}

/* Tutorial Highlighting backdrop focus */
.tutorial-highlight {
    position: relative !important;
    z-index: 99999 !important;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.75), 0 0 15px var(--color-primary) !important;
    pointer-events: auto !important;
    border-color: var(--color-primary) !important;
    background: rgba(15, 20, 36, 0.95) !important;
}

/* User Profile Astronaut Card */
.user-profile-card {
    background: radial-gradient(circle at 10% 10%, rgba(134, 165, 255, 0.12), rgba(12, 17, 33, 0.95));
    border: 1px solid rgba(134, 165, 255, 0.22);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    box-shadow: inset 0 0 15px rgba(134, 165, 255, 0.03);
}
.profile-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.profile-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.profile-hobby {
    font-size: 0.74rem;
    color: var(--text-secondary);
    border-top: 1px dashed rgba(255,255,255,0.06);
    padding-top: 0.3rem;
    margin-top: 0.2rem;
}

/* 🇰🇷 Holiday Red Markers */
.holiday-red {
    color: var(--sun-red) !important;
}
.event-badge.holiday {
    background-color: rgba(248, 113, 113, 0.12);
    color: #ffd6d6;
    border-left: 3px solid var(--sun-red);
    font-weight: 500;
}