/* --- TABLE OF CONTENTS ---
1.  Root Variables & Theming
2.  Global Styles & Resets
3.  Layout & Container
4.  Header & Logo
5.  Main Layout (Sidebar & Main Content)
6.  Panels & Cards
7.  Forms, Inputs & Buttons (including Searchable Dropdown)
8.  Item Cards & Packing List (with Swipe Styles)
9.  Widgets (Weight, Categories, Travel Info, Suitcase Animation)
10. Modals & Notifications
11. Mobile Navigation
12. Helper & Animation Classes
13. Media Queries (Responsive Design)
--------------------------- */

/* --- 1. Root Variables & Theming --- */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --danger-color: #f72585;
    --warning-color: #f7b801;
    --success-color: #4cc9f0;
    --skip-color: #ff4d6d;
    --pack-color: #80ed99;
    --light-bg: #f4f7f9;
    --dark-bg: #0d1117;
    --text-light: #212529;
    --text-dark: #e0e0e0;
    --subtle-text-light: #495057;
    --subtle-text-dark: #adb5bd;
    --card-bg-light: #ffffff;
    --card-bg-dark: #161b22;
    --border-light: #e1e4e8;
    --border-dark: #30363d;
    --shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.05);
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --primary-color: #4895ef;
    --secondary-color: #4361ee;
    --accent-color: #3f37c9;
    --light-bg: #0d1117;
    --dark-bg: #f4f7f9;
    --text-light: #e0e0e0;
    --text-dark: #212529;
    --subtle-text-light: #adb5bd;
    --subtle-text-dark: #6c757d;
    --card-bg-light: #161b22;
    --card-bg-dark: #ffffff;
    --border-light: #30363d;
    --border-dark: #e1e4e8;
    --shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.2);
}

/* --- 2. Global Styles & Resets --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--light-bg);
    color: var(--text-light);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
    padding: 20px;
}

/* --- 3. Layout & Container --- */
.container { max-width: 1200px; margin: 0 auto; }

/* --- 4. Header & Logo --- */
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.logo { font-size: 3rem; font-weight: bold; color: var(--primary-color); display: flex; align-items: center; gap: 10px; }
.header-actions { display: flex; gap: 15px; }

/* --- 5. Main Layout --- */
.main-layout { display: grid; grid-template-columns: 360px 1fr; gap: 20px; }
.main-content, .sidebar {
    opacity: 0;
    transform: translateY(20px);
    animation: panel-in 0.5s ease-out forwards;
}
.main-content { animation-delay: 0.2s; }

/* --- 6. Panels & Cards --- */
.panel {
    background: var(--card-bg-light);
    border-radius: 15px;
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
    transition: background-color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}
.panel:hover { transform: translateY(-3px); }
.panel-title { font-size: 1.1rem; margin-bottom: 20px; color: var(--primary-color); display: flex; align-items: center; gap: 10px; }
        
/* --- 7. Forms, Inputs & Buttons --- */
.form-group { margin-bottom: 15px; position: relative; }
label { display: block; margin-bottom: 5px; font-weight: 500; font-size: 0.9rem; }
input, select {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    background-color: var(--light-bg);
    color: var(--text-light);
    transition: all var(--transition-speed);
}
input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 18px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
button:hover { background-color: var(--secondary-color); transform: translateY(-2px); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
button:active { transform: translateY(0); box-shadow: inset 0 2px 4px rgba(0,0,0,0.15); }
button:disabled { background-color: #ccc; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-outline { background: transparent; border: 1px solid var(--primary-color); color: var(--primary-color); }
#generateBtn { animation: pulse-glow 2s infinite; }
        
/* Searchable Dropdown */
.autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg-light);
    border: 1px solid var(--border-light);
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow);
}
.autocomplete-item {
    padding: 10px;
    cursor: pointer;
}
.autocomplete-item:hover {
    background-color: color-mix(in srgb, var(--primary-color) 15%, transparent);
}

/* --- 8. Item Cards & Packing List --- */
.item-card {
    background: var(--card-bg-light);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
    user-select: none;
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    position: relative;
    border: 1px solid var(--border-light);
    touch-action: none; /* Important for swipe gestures */
}
.item-card.dragging { cursor: grabbing; transition: none; }
.item-card.swipe-right { transform: translateX(150%) rotate(15deg); opacity: 0; }
.item-card.swipe-left { transform: translateX(-150%) rotate(-15deg); opacity: 0; }
.item-card.swiping-right { background-color: color-mix(in srgb, var(--pack-color) 20%, transparent); }
.item-card.swiping-left { background-color: color-mix(in srgb, var(--skip-color) 20%, transparent); }
.item-icon { font-size: 24px; color: var(--primary-color); min-width: 30px; text-align: center; }
.item-details { flex-grow: 1; }
.item-name { font-weight: 600; }
.item-meta { display: flex; gap: 10px; font-size: 12px; color: var(--subtle-text-light); font-weight: 500; }
.item-category { background-color: var(--accent-color); color: white; padding: 2px 8px; border-radius: 10px; font-size: 10px; }
.swipe-hint {
    text-align: center;
    font-size: 12px;
    color: #999;
    margin-bottom: 15px;
    animation: shimmer 3s infinite;
}
.quantity-controls { display: flex; align-items: center; gap: 10px; }
.quantity-btn {
    background-color: color-mix(in srgb, var(--primary-color) 15%, transparent);
    color: var(--primary-color);
    width: 28px;
    height: 28px;
    padding: 0;
    border-radius: 50%;
    font-weight: bold;
}
.quantity-display { font-weight: bold; min-width: 15px; text-align: center; }

/* --- 9. Widgets --- */
.suitcase-widget { display: flex; flex-direction: column; align-items: center; gap: 15px; }
#suitcase-svg { width: 100px; height: auto; transition: transform 0.2s ease; }
#suitcase-svg.full { animation: suitcase-jiggle 0.5s; }
#suitcase-fill { fill: var(--suitcase-fill-color, var(--primary-color)); transition: transform 0.5s ease-out, fill 0.5s ease; transform-origin: bottom; transform: scaleY(0); }
.weight-display { font-size: 1.2rem; font-weight: bold; text-align: center; }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; margin-top: 20px; }
.category-card { background: color-mix(in srgb, var(--primary-color) 10%, transparent); border-radius: 10px; padding: 10px; text-align: center; transition: var(--transition-speed); }
.category-card:hover { transform: translateY(-5px); background-color: color-mix(in srgb, var(--primary-color) 20%, transparent); }
.category-icon { font-size: 24px; margin-bottom: 5px; color: var(--primary-color); }
.category-count { font-weight: bold; font-size: 1rem; transition: color 0.3s; }
.category-count.updated { animation: count-flip 0.5s; }
.packed-items { margin-top: 20px; max-height: 200px; overflow-y: auto; padding-right: 5px; }
.packed-item { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.info-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 15px; }
.info-item i { color: var(--accent-color); font-size: 1.1rem; margin-top: 2px; }
.info-item-content h4 { margin-bottom: 5px; font-size: 1rem; }
.info-item-content p { font-size: 0.9rem; line-height: 1.5; color: var(--subtle-text-light); }
.currency-widget { border-top: 1px solid var(--border-light); margin-top: 15px; padding-top: 15px; }
.currency-widget p { font-weight: 500; }
.currency-widget ul { list-style: none; padding-left: 0; font-size: 0.9rem; color: var(--subtle-text-light); font-weight: 500; }

/* --- 10. Modals & Notifications --- */
.modal { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(0, 0, 0, 0.5); display: flex; align-items: center; justify-content: center; z-index: 1000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
.modal.active { opacity: 1; pointer-events: all; }
.modal-content { background-color: var(--card-bg-light); padding: 25px; border-radius: 15px; max-width: 500px; width: 90%; box-shadow: var(--shadow); transform: scale(0.95) translateY(10px); transition: transform 0.3s ease, opacity 0.3s ease; }
.modal.active .modal-content { transform: scale(1) translateY(0); }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-light); }
.undo-notification { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(150%); background-color: var(--warning-color); color: #000; padding: 10px 20px; border-radius: 20px; display: flex; align-items: center; gap: 10px; z-index: 1000; transition: transform 0.3s ease; }
.undo-notification.show { transform: translateX(-50%) translateY(0); }
.undo-notification button { background: none; border: none; color: #000; font-weight: bold; cursor: pointer; }

/* --- 11. Mobile Navigation --- */
.mobile-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; background-color: var(--card-bg-light); padding: 10px; box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1); z-index: 100; border-top: 1px solid var(--border-light); }
.nav-buttons { display: flex; justify-content: space-around; }
.nav-btn { display: flex; flex-direction: column; align-items: center; font-size: 12px; color: var(--text-light); text-decoration: none; }
.nav-btn i { font-size: 18px; margin-bottom: 5px; }

/* --- 12. Helper & Animation Classes --- */
.hidden { display: none !important; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.spinner { border: 2px solid #f3f3f3; border-top: 2px solid var(--primary-color); border-radius: 50%; width: 16px; height: 16px; animation: spin 1s linear infinite; }
.loading-message { display: flex; align-items: center; justify-content: center; gap: 10px; font-style: italic; color: #999; padding: 2rem; }
@keyframes card-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.item-card-enter { animation: card-in 0.4s ease-out backwards; }
@keyframes panel-in { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse-glow { 0% { box-shadow: 0 0 5px color-mix(in srgb, var(--primary-color) 50%, transparent); } 50% { box-shadow: 0 0 20px color-mix(in srgb, var(--primary-color) 70%, transparent); } 100% { box-shadow: 0 0 5px color-mix(in srgb, var(--primary-color) 50%, transparent); } }
@keyframes shimmer { 0% { background-position: -500px 0; } 100% { background-position: 500px 0; } }
.swipe-hint { background: linear-gradient(to right, #999 40%, #fff 50%, #999 60%); background-size: 1000px 100%; color: transparent; -webkit-background-clip: text; background-clip: text; }
@keyframes count-flip { 0% { transform: rotateX(90deg); opacity: 0; } 100% { transform: rotateX(0deg); opacity: 1; } }
@keyframes suitcase-jiggle { 0%, 100% { transform: rotate(0); } 25% { transform: rotate(3deg); } 75% { transform: rotate(-3deg); } }

/* --- 13. Media Queries --- */
@media (max-width: 992px) {
    .main-layout { grid-template-columns: 1fr; }
    .sidebar { order: 2; }
    .main-content { order: 1; }
}
@media (max-width: 768px) {
    body { padding-bottom: 80px; }
    .mobile-nav { display: block; }
    .header-actions { display: none; }
}