/* === VanWeightMate — Green-on-white clean style === */

:root {
    --green: #4CAF50;
    --green-dark: #388E3C;
    --green-light: #E8F5E9;
    --text: #212121;
    --text-secondary: #777;
    --bg: #f5f5f5;
    --white: #ffffff;
    --border: #e0e0e0;
    --danger: #E53935;
    --danger-light: #FFEBEE;
    --caution: #F9A825;
    --caution-light: #FFF8E1;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* === Header === */

.header {
    background: var(--green);
    color: var(--white);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
}

.header-icon { font-size: 24px; }

.header-sub {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 16px;
    font-weight: 500;
    opacity: 0.9;
}

.header-icon-sub { font-size: 18px; }

.header-logout {
    margin-left: auto;
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    opacity: 0.85;
    transition: opacity 0.2s;
}

.header-logout:hover { opacity: 1; }

/* === Main === */

.main {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px 16px 48px;
}

/* === Login === */

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 120px);
}

.login-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 32px;
    width: 100%;
    max-width: 420px;
}

.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-icon { font-size: 40px; display: block; margin-bottom: 12px; }

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form { margin-bottom: 20px; }

.login-footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

/* === Forms === */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--green);
}

.form-group select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* === Buttons === */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--green);
    color: var(--white);
}

.btn-primary:hover { background: var(--green-dark); }

.btn-primary:disabled {
    background: var(--border);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--green);
    color: var(--green);
    cursor: pointer;
}

.btn-outline:hover {
    background: var(--green-light);
}

.btn-full { width: 100%; }

.btn-icon {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px 8px;
}

.btn-icon:hover { color: var(--danger); }

/* === Cards === */

.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--green);
    color: var(--white);
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

/* === Van Selectors === */

.van-selectors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.van-specs {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
    padding: 14px 16px;
    background: var(--green-light);
    border-radius: 8px;
}

.spec-item {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.spec-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.spec-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}

.spec-highlight .spec-value { color: var(--green-dark); }

.spec-unit {
    font-size: 13px;
    color: var(--text-secondary);
}

/* === Drop Zone === */

.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    transition: all 0.2s;
    margin-bottom: 16px;
}

.drop-zone.dragover {
    border-color: var(--green);
    background: var(--green-light);
}

.drop-icon { font-size: 36px; display: block; margin-bottom: 8px; }

.drop-text {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.drop-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* === File Info === */

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--green-light);
    border-radius: 8px;
    margin-bottom: 16px;
}

.file-icon { font-size: 18px; }
.file-name { font-weight: 500; flex: 1; }

/* === Progress Overlay === */

.progress-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

.progress-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px 40px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.progress-ring-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
}

.progress-ring {
    width: 120px;
    height: 120px;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 8;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--green);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 326.73;
    stroke-dashoffset: 326.73;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--green);
}

.progress-pct-sign { font-size: 16px; }

.progress-label {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 4px;
}

.progress-sublabel {
    color: var(--text-secondary);
    font-size: 13px;
}

/* === Summary Grid === */

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.summary-card {
    text-align: center;
    padding: 16px 12px;
    background: var(--bg);
    border-radius: 8px;
}

.summary-icon { font-size: 22px; display: block; margin-bottom: 4px; }

.summary-label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: 4px;
}

.summary-value {
    font-size: 28px;
    font-weight: 700;
}

.summary-unit {
    font-size: 14px;
    color: var(--text-secondary);
}

/* === Payload Progress Circle === */

.payload-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 24px;
}

.payload-ring-container {
    position: relative;
    width: 160px;
    height: 160px;
    margin-bottom: 12px;
}

.payload-ring {
    width: 160px;
    height: 160px;
    transform: rotate(-90deg);
}

.payload-ring-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 10;
}

.payload-ring-fill {
    fill: none;
    stroke: var(--green);
    stroke-width: 10;
    stroke-linecap: round;
    stroke-dasharray: 427.26;
    stroke-dashoffset: 427.26;
    transition: stroke-dashoffset 1s ease, stroke 0.5s ease;
}

.payload-ring-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.payload-pct-value {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
}

.payload-pct-sign {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
}

.payload-pct-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* === Warning Badge === */

.warning-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.warning-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.warning-good {
    background: var(--green-light);
    color: var(--green-dark);
}
.warning-good .warning-dot { background: var(--green); }

.warning-caution {
    background: var(--caution-light);
    color: #E65100;
}
.warning-caution .warning-dot { background: var(--caution); }

.warning-danger {
    background: var(--danger-light);
    color: var(--danger);
}
.warning-danger .warning-dot { background: var(--danger); }

/* === Results Table === */

.table-container {
    overflow-x: auto;
    margin-bottom: 20px;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.results-table thead th {
    text-align: left;
    padding: 10px 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
}

.results-table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.results-table tbody tr:hover {
    background: var(--bg);
}

.confidence-high { color: var(--green-dark); font-weight: 600; }
.confidence-medium { color: var(--caution); font-weight: 600; }
.confidence-low { color: var(--danger); font-weight: 600; }

/* === Alerts === */

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}

.alert-error {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* === Utilities === */

.hidden { display: none !important; }

/* === Responsive === */

@media (max-width: 600px) {
    .header { padding: 12px 16px; gap: 12px; }
    .main { padding: 16px 12px 32px; }
    .card { padding: 20px 16px; }
    .login-card { padding: 28px 20px; }
    .van-selectors { grid-template-columns: 1fr; }
    .summary-grid { grid-template-columns: 1fr; }
    .progress-card { padding: 32px 24px; }
}