:root {
    --bg-color: #eef2f7;
    --panel-bg: #ffffff;
    --text-color: #2b2f36;
    --text-muted: #7a828c;
    --primary: #2e8b8b;        /* Teal */
    --primary-hover: #246e6e;
    --error: #ef5350;
    --success: #43a047;
    --warn: #f6a609;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 0;
}

.app-shell {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 16px 40px;
}

.hidden { display: none !important; }

/* Login */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.panel {
    background-color: var(--panel-bg);
    padding: 22px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    margin-top: 18px;
}

.login-container .panel { width: 100%; max-width: 360px; text-align: center; }

.panel h2 { margin-bottom: 16px; }
.panel h3 { margin-bottom: 10px; }

input[type="password"] {
    width: 100%;
    padding: 14px;
    border: 2px solid #cfd6df;
    border-radius: 8px;
    font-size: 22px;
    text-align: center;
    margin-bottom: 16px;
    outline: none;
}
input[type="password"]:focus { border-color: var(--primary); }

.primary-button {
    padding: 13px 20px;
    background-color: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}
.primary-button:hover { background-color: var(--primary-hover); }
.primary-button:disabled { opacity: 0.5; cursor: default; }
.primary-button.inline { width: auto; }
.login-container .primary-button { width: 100%; }

.error-msg { color: var(--error); margin-top: 12px; font-size: 14px; }

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 4px 0;
}

.ghost-button {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
}

.hint { color: var(--text-muted); font-size: 14px; line-height: 1.5; margin-bottom: 14px; }

.row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.row label { font-weight: bold; }

.num-input {
    width: 80px;
    padding: 10px;
    border: 2px solid #cfd6df;
    border-radius: 8px;
    font-size: 16px;
    text-align: center;
}

input[type="file"] {
    flex: 1;
    min-width: 200px;
    padding: 8px;
    border: 2px dashed #cfd6df;
    border-radius: 8px;
    background: #fafbfc;
}

.stats-line { font-size: 15px; line-height: 1.5; }

.result-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin: 14px 0 6px;
}
.result-head-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* Barcodes */
.barcodes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin-top: 14px;
}
.bc-card {
    border: 1px solid #e2e6ea;
    border-radius: 10px;
    padding: 12px;
    background: #fff;
    text-align: center;
}
.bc-img { width: 100%; }
.bc-img svg { width: 100%; height: auto; max-width: 260px; }
.bc-actions { display: flex; justify-content: center; gap: 16px; margin-top: 8px; }

.output {
    width: 100%;
    padding: 12px;
    border: 2px solid #cfd6df;
    border-radius: 8px;
    font-family: "SF Mono", Consolas, "Courier New", monospace;
    font-size: 16px;
    letter-spacing: 1px;
    resize: vertical;
}

.result-box {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    border-left: 4px solid var(--primary);
    background: #f6f9f9;
}
.result-box ul { margin: 8px 0 0 20px; }
.result-box.ok-box { border-left-color: var(--success); }
.result-box.warn-box { border-left-color: var(--warn); }
.result-box.error { border-left-color: var(--error); background: #fdecea; }
.result-box .warn { margin-top: 12px; color: #8a5b00; background: #fff7e6; padding: 10px; border-radius: 6px; }
.result-box .ok { margin-top: 12px; color: var(--success); font-weight: bold; }

details.panel summary {
    cursor: pointer;
    font-weight: bold;
    font-size: 17px;
}
details.panel[open] summary { margin-bottom: 12px; }

.danger-button {
    background-color: var(--error);
    color: white;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
}
.danger-button:hover { background-color: #d32f2f; }