/* ---
--- "Warm, Inviting & Clear" M3-Inspired Redesign
--- Designed for Senior Accessibility and Appeal
--- Key Features: Consistently Large Text, High Contrast, Cheerful Accent Colors
--- */

/* --- 1. System Variables: A New Theme for Clarity & Joy --- */
:root {
    /* Color Palette: Trustworthy Blue with a Sunny, Cheerful Accent */
    --brand-primary: #1565c0; /* A deep, friendly, and trustworthy blue */
    --brand-primary-light: #e3f2fd; /* Light blue for backgrounds */
    --brand-accent: #ffab40;      /* A warm, sunny, and inviting orange-yellow */
    --brand-accent-light: #fff3e0; /* A soft cream for highlights */
    
    --surface-main: #fdfdfd;      /* Main card and component background (off-white) */
    --surface-container: #f5f5f5; /* App's main background (light, warm grey) */
    --text-primary: #212121;      /* Very dark grey for high-contrast text */
    --text-secondary: #616161;    /* Lighter grey for supporting text */
    --outline-main: #e0e0e0;      /* Soft borders */
    
    /* Typography Scale: Larger & Bolder for Maximum Readability */
    --font-family-main: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --typescale-headline-large: 700 2.25rem/2.75rem var(--font-family-main);
    --typescale-headline-medium: 600 1.9rem/2.4rem var(--font-family-main);
    --typescale-title-large: 700 1.4rem/1.8rem var(--font-family-main);
    --typescale-title-medium: 600 1.25rem/1.6rem var(--font-family-main);
    --typescale-body-large: 400 1.15rem/1.7rem var(--font-family-main); /* Base text size, now larger */
    --typescale-label-large: 600 1.1rem/1.5rem var(--font-family-main);
    --typescale-label-medium: 500 0.9rem/1.1rem var(--font-family-main);

    /* Shape & Elevation: Soft and Approachable */
    --shape-corner-medium: 12px;
    --shape-corner-large: 16px;
    --shape-corner-extra-large: 28px;
    --shape-corner-full: 999px;
    --elevation-soft: 0px 4px 12px rgba(0,0,0,0.08);
    --elevation-raised: 0px 6px 20px rgba(0,0,0,0.12);
}

/* --- 2. Global Resets & App Layout --- */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font: var(--typescale-body-large);
    background-color: #dcdcdc; /* Neutral background to make the app stand out */
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 420px;
    height: 850px;
    max-height: 90vh;
    background-color: var(--surface-container);
    border-radius: var(--shape-corner-extra-large);
    box-shadow: var(--elevation-raised);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.app-content { flex-grow: 1; overflow-y: auto; padding-bottom: 90px; }
.page { display: none; padding: 0 1.5rem; }
.page.active { display: block; }
.page-header { padding: 2rem 0 1.5rem 0; }
.page-header h1 { font: var(--typescale-headline-large); }

/* --- 3. Core Components with New Theme --- */

/* Bottom Navigation */
.bottom-nav { height: 85px; position: absolute; bottom: 0; left: 0; right: 0; background-color: var(--surface-main); border-top: 1px solid var(--outline-main); display: flex; justify-content: space-around; align-items: center; }
.nav-btn { display: flex; flex-direction: column; align-items: center; gap: 4px; font: var(--typescale-label-medium); color: var(--text-secondary); background: none; border: none; cursor: pointer; }
.nav-btn i { font-size: 1.75rem; }
.nav-btn.active { color: var(--brand-primary); font-weight: 700; }

/* Search Bar */
.search-bar { position: relative; margin-bottom: 1.5rem; }
.search-bar i { position: absolute; left: 1.25rem; top: 50%; transform: translateY(-50%); font-size: 1.25rem; color: var(--text-secondary); }
.search-bar input { height: 56px; width: 100%; padding-left: 3.75rem; font: var(--typescale-body-large); background-color: #e9e9e9; border-radius: var(--shape-corner-full); border: 1px solid var(--outline-main); outline: none; }

/* Filter Buttons: Cheerful and Inviting */
.filter-tabs { display: flex; gap: 0.75rem; margin-bottom: 1.5rem; }
.filter-btn { height: 44px; padding: 0 1.5rem; font: var(--typescale-label-large); background-color: #e0e0e0; color: var(--text-secondary); border-radius: var(--shape-corner-full); border: none; cursor: pointer; transition: all 0.2s ease; }
.filter-btn.active { background-color: var(--brand-accent); color: var(--text-primary); box-shadow: 0 2px 4px rgba(0,0,0,0.1); }

/* Cards: Clear & Legible */
.list-container { display: flex; flex-direction: column; gap: 1rem; }
.card { background-color: var(--surface-main); border-radius: var(--shape-corner-large); padding: 1.25rem; display: flex; align-items: center; gap: 1.25rem; box-shadow: var(--elevation-soft); cursor: pointer; transition: transform 0.2s ease; }
.card:hover { transform: scale(1.02); }
.card-image img { width: 70px; height: 70px; border-radius: 50%; object-fit: cover; }
.card-details h3 { font: var(--typescale-title-large); margin-bottom: 0.5rem; }
.card-details .location, .card-details .info { font: var(--typescale-body-large); color: var(--text-secondary); display: flex; align-items: center; gap: 0.5rem; }

/* Modal Dialog: Spatious and Easy to Read */
.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; justify-content: center; align-items: center; }
.modal.active { display: flex; }
.modal-overlay { position: absolute; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); }
.modal-content {
    background-color: var(--surface-main);
    position: relative;
    z-index: 2; /* <-- THE FIX IS HERE. This lifts the content above the overlay. */
    border-radius: var(--shape-corner-extra-large);
    width: 90%;
    max-width: 500px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--elevation-raised);
    animation: slide-up 0.3s ease-out;
}
@keyframes slide-up { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
#modal-body { flex-grow: 1; overflow-y: auto; padding: 1.5rem 2rem; }
.modal-close-btn { position: absolute; top: 1rem; right: 1rem; font-size: 2.5rem; color: var(--text-secondary); background: none; border: none; cursor: pointer; z-index: 10; }
.modal-header { text-align: center; padding: 1.5rem 0; }
.modal-header img { width: 110px; height: 110px; border-radius: 50%; object-fit: cover; margin-bottom: 1rem; box-shadow: var(--elevation-soft); }
.modal-header h2 { font: var(--typescale-headline-medium); }
.modal-header p { font: var(--typescale-title-medium); color: var(--text-secondary); }
.modal-section { margin-top: 2rem; }
.modal-section h3 { font: var(--typescale-title-medium); border-bottom: 2px solid var(--brand-accent); padding-bottom: 0.5rem; margin-bottom: 1rem; }
.modal-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; text-align: center; margin: 1.5rem 0; }
.modal-info-item { background-color: var(--brand-accent-light); padding: 1rem; border-radius: var(--shape-corner-medium); }
.modal-info-item .label { font-size: 1rem; color: var(--text-secondary); display: block; margin-bottom: 0.25rem; }
.modal-info-item .value { font: var(--typescale-title-medium); color: var(--text-primary); }
.modal-list li, .modal-description { font: var(--typescale-body-large); /* ALL descriptions are now large */ }
.modal-footer { padding: 1.5rem 2rem; border-top: 1px solid var(--outline-main); background-color: var(--surface-main); border-bottom-left-radius: var(--shape-corner-extra-large); border-bottom-right-radius: var(--shape-corner-extra-large); }
.modal-action-btn { width: 100%; height: 56px; background-color: var(--brand-primary); color: white; font: var(--typescale-label-large); font-weight: 700; border: none; border-radius: var(--shape-corner-full); cursor: pointer; }
.modal-action-btn:disabled { background-color: #a9a9a9; color: #e0e0e0; cursor: not-allowed; }

/* --- 4. Page-Specific Styles --- */

/* Alert Page */
.alert-card { background-color: var(--brand-primary-light); border-radius: var(--shape-corner-large); padding: 1.25rem; display: flex; align-items: center; gap: 1rem; border: 1px solid var(--brand-primary); }
.alert-card-icon { font-size: 1.75rem; color: var(--brand-primary); }
.alert-card-details h4 { font: var(--typescale-title-medium); }
.alert-card-details p { color: var(--text-secondary); }

/* Profile Page & Forms */
.profile-form { padding-top: 2rem; text-align: left; display: flex; flex-direction: column; gap: 1.5rem; }
.form-group label { font: var(--typescale-label-large); color: var(--brand-primary); margin-bottom: 0.5rem; }
.form-group input, .form-group select { height: 56px; padding: 1rem; font: var(--typescale-body-large); background-color: var(--surface-main); border-radius: var(--shape-corner-medium); border: 1px solid var(--outline-main); }
.form-group input:focus, .form-group select:focus { outline: 2px solid var(--brand-primary); }
.action-button { height: 56px; background-color: var(--brand-primary); color: white; border: none; border-radius: var(--shape-corner-full); font: var(--typescale-label-large); font-weight: 700; cursor: pointer; margin-top: 1rem; }

/* QR Scanner Page */
.placeholder-content { padding-top: 3rem; text-align: center; }
.placeholder-content i { font-size: 6rem; color: var(--brand-accent); margin-bottom: 1.5rem; }
.placeholder-content p { font: var(--typescale-title-medium); color: var(--text-secondary); max-width: 300px; margin: 0 auto 1.5rem auto; }
#camera-container { width: 100%; padding-top: 1rem; }
#qr-canvas { width: 100%; height: auto; border-radius: var(--shape-corner-large); }
#scan-status { text-align: center; margin-top: 1.5rem; font: var(--typescale-label-large); color: var(--text-secondary); height: 1.5rem; }
.hidden { display: none !important; }