:root { 
    --green: #28a745; 
    --green-light: #2ecc71;
    --green-dark: #218838;
    --gray: #888; 
    --bg: #f4f7f6; 
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
    background: var(--bg); 
    margin: 0; 
    padding: 5px 4px 15px 4px; 
    display: flex; 
    flex-direction: column; 
    min-height: 100vh; 
}

body.private-mode {
    --green: #8b5cf6;
    --green-light: #a78bfa;
    --green-dark: #7c3aed;
}

.app-frame { 
    background: #fff; 
    border-radius: 25px; 
    padding: 10px 0px; 
    box-shadow: 0 4px 20px rgba(0,0,0,0.05); 
    width: 96%; 
    max-width: 600px; 
    margin: 0 auto; 
    flex-grow: 1;
}

header, .add-box, .list-header, h2, .suggestions, .main-footer {
    margin-left: 12px;
    margin-right: 12px;
}

.tabs {
    display: flex;
    background: #f1f3f5;
    border-radius: 20px;
    margin: 0 auto 15px auto;
    padding: 2px;
    width: 100%;
    max-width: 180px;
}

.tab-btn {
    flex: 1;
    padding: 6px 8px;
    border: none;
    background: transparent;
    font-size: 12px;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    border-radius: 18px;
    transition: all 0.25s;
}

.tab-btn.active {
    background: var(--green);
    color: #fff;
    box-shadow: 0 1px 5px rgba(0,0,0,0.1);
}

.add-box { 
    display: flex; 
    gap: 8px; 
    background: #f9f9f9; 
    padding: 12px; 
    border-radius: 20px; 
    margin-bottom: 20px; 
    align-items: center; 
    position: relative; 
}

input[name="item_name"] { flex-grow: 1; border: 1px solid #ddd; border-radius: 12px; padding: 14px 12px; font-size: 16px; outline: none; min-width: 0; }
.btn-add { background: var(--green); color: white; border: none; padding: 14px 20px; border-radius: 12px; font-weight: bold; cursor: pointer; }

#custom-autocomplete {
    display: none; position: absolute; top: calc(100% - 10px); left: 12px; 
    background: white; border: 1px solid #e0e0e0; border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15); max-height: 250px; overflow-y: auto; z-index: 1001;
}

.autocomplete-item { padding: 15px 20px; cursor: pointer; border-bottom: 1px solid #f5f5f5; font-size: 16px; }
.autocomplete-item:hover, .autocomplete-item.active { background-color: #f9f9f9; }

.suggestions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 25px; }
.tag { background: #eef1f4; color: #495057; padding: 8px 14px; border-radius: 20px; font-size: 13px; text-decoration: none; }

h2 { font-size: 0.75rem; color: var(--gray); text-transform: uppercase; margin: 15px 0 10px 15px; letter-spacing: 1px; }

.card { 
    background: #fbfbfb; 
    border-top: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
    border-left: none;
    border-right: none;
    border-radius: 0; 
    overflow: hidden; 
    margin-bottom: 20px; 
    width: 100%;
}

.row { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 15px 14px; 
    border-bottom: 1px solid #eee; 
    transition: all 0.3s ease-out; 
}
.row:last-child { border-bottom: none; }
.row.fade-out-right { transform: translateX(100px); opacity: 0; background: #eafaf1; }
.row.fade-out-left { transform: translateX(-100px); opacity: 0; background: #fff; }

.text { 
    font-size: 17px; 
    flex: 1; 
    display: flex; 
    align-items: center; 
    flex-wrap: wrap; 
    gap: 4px; 
    line-height: 1.3;
}

.qty-label { color: var(--gray); font-size: 0.85em; }

.action-form {
    margin: 0;
    padding: 0;
    display: inline-flex;
}

.check-btn, .restore-btn {
    border: none;
    cursor: pointer;
    outline: none;
    font-family: inherit;
    -webkit-appearance: none;
    padding: 0;
}

.check-btn { 
    text-decoration: none; background: var(--green) !important; color: white !important; 
    width: 44px; height: 44px; display: flex; align-items: center; 
    justify-content: center; border-radius: 50%; font-size: 20px; 
}

.restore-btn { 
    text-decoration: none; background: var(--green-dark) !important; color: white !important; 
    width: 44px; height: 44px; display: flex; align-items: center; 
    justify-content: center; border-radius: 50%; font-size: 22px; 
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.check-btn:active, .restore-btn:active { transform: scale(0.9); opacity: 0.8; }

.bought-text { color: #ccc; text-decoration: line-through; }
.btn-clear { background: none; border: none; color: #dc3545; font-size: 13px; cursor: pointer; text-decoration: underline; width: 100%; padding: 15px; }

.login-box { background: white; padding: 30px; border-radius: 25px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); width: 90%; max-width: 350px; text-align: center; margin: 30px auto; }
.login-input { width: 100%; padding: 15px; margin: 10px 0; border: 1px solid #ddd; border-radius: 12px; font-size: 16px; outline: none; }
.login-btn { width: 100%; padding: 15px; background: var(--green); color: white; border: none; border-radius: 12px; font-weight: bold; cursor: pointer; }

.main-footer { margin-top: auto; padding: 30px 0; text-align: center; font-size: 12px; }
.footer-content { color: #999; display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-link { color: #777; text-decoration: none; font-weight: 600; }

.quantity-group {
    display: inline-flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 12px;
    background: #fff;
    width: 100px;
    height: 49px;
    overflow: hidden;
    flex-shrink: 0;
}
.quantity-group input {
    width: 48px;
    border: none !important;
    padding: 14px 0 14px 10px;
    font-size: 16px;
    outline: none;
    text-align: center;
    background: transparent;
}
.quantity-group .select-unit {
    width: 52px;
    border: none !important;
    padding: 14px 15px 14px 0;
    font-size: 14px;
    outline: none;
    background: transparent;
    cursor: pointer;
    color: #888;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'><path fill='%23aaa' d='M0 3l5 5 5-5z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 6px center;
}

.offline-banner {
    display: none;
    background: #e74c3c;
    color: #fff;
    text-align: center;
    padding: 10px;
    font-size: 13px;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 9999;
}

body.is-offline .offline-banner {
    display: block;
}

body.is-offline .btn-add,
body.is-offline .check-btn,
body.is-offline .restore-btn,
body.is-offline .btn-clear,
body.is-offline .quick-add-trigger,
body.is-offline .quantity-group {
    opacity: 0.4;
    pointer-events: none;
    filter: grayscale(100%);
}

@media (min-width: 480px) {
    .app-frame { padding: 20px; width: 100%; }
    .card { border: 1px solid #f0f0f0; border-radius: 20px; }
    header, .add-box, .list-header, h2, .suggestions, .main-footer { margin-left: 0; margin-right: 0; }
    h2 { margin-left: 5px; }
}

:root {
    --bg-dark: #121212;
    --frame-dark: #1e1e1e;
    --card-dark: #252525;
    --border-dark: #333333;
    --text-dark: #e0e0e0;
    --input-bg-dark: #2c2c2c;
    --tag-bg-dark: #333a42;
    --tag-text-dark: #cfd8dc;
}

@media (prefers-color-scheme: dark) {
    body:not(.light-theme) { background: var(--bg-dark); color: var(--text-dark); }
    body:not(.light-theme) .app-frame { background: var(--frame-dark); box-shadow: 0 4px 20px rgba(0,0,0,0.3); width: 96%; }
    body:not(.light-theme) .add-box { background: var(--input-bg-dark); }
    body:not(.light-theme) .tabs { background: var(--input-bg-dark); }
    body:not(.light-theme) input[name="item_name"], 
    body:not(.light-theme) .login-input { background: var(--frame-dark); border-color: var(--border-dark); color: #fff; }
    body:not(.light-theme) .tag { background: var(--tag-bg-dark); color: var(--tag-text-dark); }
    body:not(.light-theme) .card { background: var(--card-dark); border-color: var(--border-dark); }
    body:not(.light-theme) .row { border-bottom-color: var(--border-dark); }
    body:not(.light-theme) #custom-autocomplete { background: var(--card-dark); border-color: var(--border-dark); }
    body:not(.light-theme) .autocomplete-item { border-bottom-color: var(--border-dark); }
    body:not(.light-theme) .autocomplete-item:hover, body:not(.light-theme) .autocomplete-item.active { background-color: var(--input-bg-dark); }
    body:not(.light-theme) .qty-label { color: #aaa; }
    body:not(.light-theme) #groupCode { background: var(--frame-dark) !important; color: #aaa !important; }
    body:not(.light-theme) .copy-btn { background: var(--input-bg-dark); border-color: var(--border-dark); }
    body:not(.light-theme) .instructions { border-top-color: var(--border-dark); color: #aaa; }
    body:not(.light-theme) .instructions h3 { color: #fff; }
    body:not(.light-theme) .quantity-group {
        background: var(--frame-dark) !important;
        border-color: var(--border-dark) !important;
    }
    body:not(.light-theme) .quantity-group input { color: #fff !important; }
    body:not(.light-theme) .quantity-group .select-unit {
        color: #fff !important;
        background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'><path fill='%23fff' d='M0 3l5 5 5-5z'/></svg>") !important;
    }
}

body.dark-theme { background: var(--bg-dark) !important; color: var(--text-dark) !important; }
body.dark-theme .app-frame { background: var(--frame-dark) !important; box-shadow: 0 4px 20px rgba(0,0,0,0.3) !important; width: 96% !important; }
body.dark-theme .add-box, body.dark-theme .tabs { background: var(--input-bg-dark) !important; }
body.dark-theme input[name="item_name"], 
body.dark-theme .login-input { background: var(--frame-dark) !important; border-color: var(--border-dark) !important; color: #fff !important; }
body.dark-theme .tag { background: var(--tag-bg-dark) !important; color: var(--tag-text-dark) !important; }
body.dark-theme .card { background: var(--card-dark) !important; border-color: var(--border-dark) !important; }
body.dark-theme .row { border-bottom-color: var(--border-dark) !important; }
body.dark-theme #custom-autocomplete { background: var(--card-dark) !important; border-color: var(--border-dark) !important; }
body.dark-theme .autocomplete-item { border-bottom-color: var(--border-dark) !important; }
body.dark-theme .autocomplete-item:hover, body.dark-theme .autocomplete-item.active { background-color: var(--input-bg-dark) !important; }
body.dark-theme .qty-label { color: #aaa !important; }
body.dark-theme .bought-text { color: #555 !important; }
body.dark-theme #groupCode { background: var(--frame-dark) !important; color: #aaa !important; }
body.dark-theme .copy-btn { background: var(--input-bg-dark) !important; border-color: var(--border-dark) !important; }
body.dark-theme .instructions { border-top-color: var(--border-dark) !important; color: #aaa !important; }
body.dark-theme .instructions h3 { color: #fff !important; }
body.dark-theme .quantity-group {
    background: var(--frame-dark) !important;
    border-color: var(--border-dark) !important;
}
body.dark-theme .quantity-group input { color: #fff !important; }
body.dark-theme .quantity-group .select-unit {
    color: #fff !important;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'><path fill='%23fff' d='M0 3l5 5 5-5z'/></svg>") !important;
}