/* ── Layout / Nav ── */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

nav {
    display: flex;
    width: 100%;
    height: 52px;
    background-color: #0d2b6e;
}

nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-family: sans-serif;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: background-color 0.2s;
}

nav a.nav-scan {
    flex: 3;
    background-color: #0a1e52;
    color: #e8f0fe;
}

nav a.nav-scan:hover {
    background-color: #0f3460;
}

nav a.nav-setup {
    flex: 1;
    background-color: #414953;
    color: #ffffff;
}

nav a.nav-setup:hover {
    background-color: #0d47a1;
}

main {
    padding: 1rem;
}

/* ── Homepage / QR Scanner ── */
.scanner-wrapper {
    max-width: 540px;
    margin: 2rem auto;
    font-family: sans-serif;
    padding: 0 1rem;
}

.scanner-wrapper h1 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: #0d2b6e;
}

#camera-panel {
    display: block;
    margin-top: 1.2rem;
    border: 2px solid #0f3460;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    background: #071433;
    min-height: 220px;
}

/* Idle placeholder – shown when NOT scanning */
.idle-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    color: #4d6fa8;
    font-family: sans-serif;
    font-size: 0.9rem;
    pointer-events: none;
    transition: opacity 0.2s;
}

.idle-placeholder svg {
    opacity: 0.35;
}

#camera-panel.is-scanning .idle-placeholder {
    display: none;
}

/* Video – hidden until scanning */
#camera-panel video {
    width: 100%;
    display: none;
}

#camera-panel.is-scanning video {
    display: block;
}

#camera-panel canvas {
    display: none;
}

/* Scan overlays – hidden until scanning */
.scan-indicator {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 40%;
    border: 3px solid rgba(21, 101, 192, 0.85);
    border-radius: 6px;
    pointer-events: none;
    box-shadow: 0 0 0 2000px rgba(0,0,0,0.35);
}

#camera-panel.is-scanning .scan-indicator {
    display: block;
}

.scanning-label {
    display: none;
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 0.8rem;
    background: rgba(0,0,0,0.55);
    padding: 3px 10px;
    border-radius: 20px;
    white-space: nowrap;
}

#camera-panel.is-scanning .scanning-label {
    display: block;
}

#scan-btn {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #0f3460;
    color: #fff;
    border: none;
    padding: 0.65rem 1.4rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 1.2rem;
}

#scan-btn:hover { background-color: #0a1e52; }
#scan-btn:disabled { background-color: #888; cursor: not-allowed; }

#cancel-btn {
    display: none;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #ce4a4a;
    color: #fff;
    border: none;
    padding: 0.65rem 1.4rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 1.2rem;
}

#cancel-btn:hover { background-color: #a10d0d; }

#send-btn {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: #157347;
    color: #fff;
    border: none;
    padding: 0.65rem 1.4rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 1rem;
}

#send-btn:hover { background-color: #0f5132; }
#send-btn:disabled { background-color: #888; cursor: not-allowed; }

#send-status {
    margin-top: 0.6rem;
    font-size: 0.85rem;
    min-height: 1.2em;
    border-radius: 5px;
    padding: 0 0.2rem;
}

#send-status.success { color: #0f5132; }
#send-status.error   { color: #c0392b; }

#result-card {
    display: none;
    margin-top: 1.4rem;
    border: 1px solid #b3cde8;
    border-radius: 8px;
    padding: 1.2rem 1.4rem;
    background: #f0f7ff;
}

#result-card h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: #0d2b6e;
    border-bottom: 1px solid #b3cde8;
    padding-bottom: 0.5rem;
}

.field-row {
    display: flex;
    align-items: baseline;
    margin-bottom: 0.65rem;
    gap: 0.5rem;
}

.field-label {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #3a5580;
    min-width: 120px;
}

.field-value {
    font-size: 1rem;
    color: #0d2b6e;
    word-break: break-all;
}

.field-select {
    font-size: 0.95rem;
    color: #0d2b6e;
    border: 1px solid #b3cde8;
    border-radius: 6px;
    background: #fff;
    padding: 0.35rem 0.5rem;
}

#error-msg {
    display: none;
    margin-top: 1rem;
    color: #c0392b;
    font-size: 0.9rem;
    background: #fdecea;
    border: 1px solid #f5c6c2;
    border-radius: 6px;
    padding: 0.6rem 0.9rem;
}