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

html, body { max-width: 100%; overflow-x: hidden; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

/* Auth */

.auth-container {
    max-width: 400px;
    margin: 100px auto;
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.auth-container h1 { text-align: center; color: #333; margin-bottom: 30px; }
.auth-tabs { display: flex; gap: 10px; margin-bottom: 20px; }
.auth-tab {
    flex: 1; padding: 10px; border: none;
    background: #e0e0e0; border-radius: 8px;
    cursor: pointer; font-weight: 600;
}
.auth-tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}
.auth-form { display: none; }
.auth-form.active { display: block; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; color: #555; font-weight: 500; }
.form-group input {
    width: 100%; padding: 12px;
    border: 2px solid #e0e0e0; border-radius: 8px;
    font-size: 1em;
}
.auth-btn {
    width: 100%; padding: 12px;
    border: none; border-radius: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff; font-weight: 600; cursor: pointer; font-size: 1em;
}
.auth-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.error-message { color: #dc3545; font-size: 0.9em; margin-top: 10px; text-align: center; }

/* Main layout */

.container {
    max-width: 1108px;
    margin: 0 auto;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    padding: 30px;
    display: none;
}
.container.show { display: block; }

.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}
.header-brand { display: flex; align-items: center; gap: 12px; }
.header-brand img { width: 48px; height: 48px; border-radius: 8px; }
.header-titles h1 { color: #333; font-size: 2em; line-height: 1.1; }
.header-tagline { color: #667eea; font-size: 0.95em; font-weight: 600; margin-top: 2px; }

.user-info { display: flex; align-items: center; gap: 15px; }
.user-email { color: #666; font-size: 0.9em; }
.logout-btn {
    padding: 8px 16px;
    background: #dc3545;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

/* Calendar */

.calendar-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 20px;
}
.date-nav { width: 100%; }
.about-today {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: 12px;
}
.selected-date { font-weight: 600; color: #333; font-size: 1.1em; }
.today-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
}
.today-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.calendar-nav { display: flex; gap: 10px; align-items: center; }
.calendar-nav button {
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}
.calendar-nav button:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
input[type="date"] {
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
}

/* Stats */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}
.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.stat-card h3 { font-size: 0.9em; margin-bottom: 15px; opacity: 0.9; text-align: center; }
.circles-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 10px;
}
.circle {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 3px solid #fff;
    background: transparent;
    transition: background 0.3s;
}
.circle.filled { background: #fff; }
.stat-text { text-align: center; font-size: 0.85em; opacity: 0.9; margin-top: 10px; }
.stat-count { text-align: center; font-size: 1.5em; font-weight: bold; margin-top: 5px; }

/* Inputs / sections */

.input-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
}
.input-section h2 { color: #333; margin-bottom: 20px; font-size: 1.3em; }

.input-group { margin-bottom: 15px; position: relative; }
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
label { display: block; margin-bottom: 5px; color: #555; font-weight: 500; }

input[type="text"], input[type="number"], select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
    background: #fff;
}
input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

/* USDA search */

.search-results {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    border: 2px solid #667eea;
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.search-results.show { display: block; }
.search-item {
    padding: 12px;
    cursor: pointer;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.2s;
}
.search-item:hover { background: #f8f9fa; }
.search-item-name { font-weight: 600; color: #333; margin-bottom: 3px; }
.search-item-details { font-size: 0.85em; color: #666; }
.per100-note { font-size: 0.78em; color: #999; margin-left: 4px; }

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}
.btn-secondary { background: #6c757d; color: #fff; margin-top: 10px; }

/* Tabs */

.tab-container { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.tab {
    flex: 1; min-width: 100px;
    padding: 12px;
    background: #e0e0e0;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}
.tab.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Entries – grow with content */

.entries-section { margin-top: 30px; }
.entries-section h2 { color: #333; margin-bottom: 15px; font-size: 1.3em; }

/* NOTE: no max-height, no overflow here so page scrolls */
.entry-list { margin-top: 10px; }

.entry-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.entry-item.meal { background: #fff9e6; border: 2px solid #ffc107; }
.entry-item.shared { background: #e8f5e9; border: 2px solid #4caf50; }
.entry-info { flex: 1; }
.entry-name { font-weight: 600; color: #333; margin-bottom: 5px; }
.entry-details { color: #666; font-size: 0.9em; }
.entry-actions { display: flex; gap: 8px; align-items: center; }

.edit-btn, .delete-btn, .share-btn {
    color: #fff;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}
.edit-btn { background: #007bff; }
.delete-btn { background: #dc3545; }
.share-btn { background: #28a745; }

/* Modals */

.modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}
.modal.show { display: flex; }

.modal-content {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-content h3 { margin-bottom: 20px; color: #333; }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; }
.modal-actions button { flex: 1; }

/* Shared meals */

.shared-meals-list { max-height: 400px; overflow-y: auto; }
.shared-meal-item {
    background: #e8f5e9;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 10px;
    border: 2px solid #4caf50;
    cursor: pointer;
}
.shared-meal-item:hover { border-color: #2e7d32; }
.shared-meal-header { font-weight: 600; color: #333; margin-bottom: 5px; }
.shared-by { font-size: 0.85em; color: #666; font-style: italic; }

/* Weight */

canvas { max-width: 100%; cursor: pointer; }
.weight-chart {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    border: 2px solid #e0e0e0;
}
.chart-instructions {
    text-align: center;
    color: #666;
    font-size: 0.9em;
    margin-top: 10px;
    font-style: italic;
}

.loading { text-align: center; padding: 20px; color: #666; }
.api-note { font-size: 0.85em; color: #666; margin-top: 10px; font-style: italic; }

/* Mobile */

@media (max-width: 768px) {
    body { padding: 0; }

    .container {
        width: 100%;
        max-width: 100%;
        margin: 0;
        border-radius: 0;
        padding: 12px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .header-brand img { width: 36px; height: 36px; }
    .header-titles h1 { font-size: 1.4em; }
    .header-tagline { font-size: 0.85em; }

    .calendar-section { padding: 12px; }
    .about-today { width: 100%; margin-bottom: 10px; }
    .selected-date { font-size: 1em; }

    .calendar-nav { width: 100%; gap: 6px; }
    .calendar-nav button,
    .calendar-nav input[type="date"] {
        flex: 1 1 0;
        min-width: 0;
    }

    .stats-grid { grid-template-columns: 1fr; gap: 12px; }
    .stat-card { padding: 12px; }

    .tab-container { gap: 6px; }
    .tab {
        flex: 1 1 48%;
        padding: 8px;
        font-size: 0.9em;
        text-align: center;
    }

    .input-section { padding: 12px; }
    .entries-section h2 { font-size: 1.05em; }
}