:root {
    --rotaid-dark: #0b3d2b;
    --rotaid-dark-2: #123f2d;
    --rotaid-green: #2f9e44;
    --rotaid-lime: #7ed957;
    --rotaid-white: #ffffff;
    --rotaid-ink: #0d2f22;
    font-size: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    color: var(--rotaid-ink);
    background: #f2f5f3;
}

/* Hero */
.hero {
    position: relative;
    min-height: 60vh;
    background:
        linear-gradient(120deg, rgba(11, 61, 43, 0.85) 0%, rgba(11, 61, 43, 0.55) 45%, rgba(11, 61, 43, 0.35) 100%),
        url("https://www.rotaid.com/crop/2560x1280x0x369/media/2025-07/Rotaid-247-Lidl.jpg") center/cover no-repeat;
    display: flex;
    flex-direction: column;
    color: var(--rotaid-white);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.4rem;
    letter-spacing: 0.05em;
}

.brand-mark {
    color: var(--rotaid-lime);
}

.brand-name strong {
    color: var(--rotaid-lime);
}

.logout-form {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
}

.logged-in-as {
    font-size: 0.9rem;
    opacity: 0.85;
}

.logout-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.6);
    color: var(--rotaid-white);
    padding: 0.4rem 0.9rem;
    border-radius: 1.5rem;
    font-size: 0.85rem;
    cursor: pointer;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.hero-content {
    margin: auto 0 7rem;
    padding: 0 2rem;
    max-width: 40rem;
}

.hero-content h1 {
    font-size: 2.75rem;
    line-height: 1.15;
    margin: 0 0 1rem;
    font-weight: 800;
}

.hero-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

/* Panel */
.panel-wrap {
    display: flex;
    justify-content: center;
    padding: 0 1.5rem;
}

.panel {
    position: relative;
    z-index: 1;
    background: var(--rotaid-white);
    border-radius: 1rem;
    box-shadow: 0 20px 45px rgba(11, 61, 43, 0.18);
    padding: 2.5rem;
    max-width: 60rem;
    width: 100%;
    margin-top: -4rem;
    margin-bottom: 3rem;
}

.panel h2 {
    margin-top: 0;
    color: var(--rotaid-dark);
    font-size: 1.6rem;
}

/* Selectors */
.selectors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--rotaid-dark-2);
}

.field select,
.field input {
    padding: 0.65rem 0.75rem;
    border: 1px solid #cfd8d3;
    border-radius: 0.5rem;
    font-size: 1rem;
    background: var(--rotaid-white);
}

.field select:disabled {
    background: #f0f2f1;
    color: #9aa5a0;
}

/* Uploads */
.uploads {
    display: flex;
    flex-wrap: nowrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.upload-btn {
    flex: 1 1 0;
    min-width: 0;
    text-align: center;
    background: var(--rotaid-dark-2);
    color: var(--rotaid-white);
    padding: 0.9rem 1.25rem;
    border-radius: 2rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.upload-btn:hover {
    background: var(--rotaid-dark);
    border-color: var(--rotaid-lime);
}

.upload-btn.disabled {
    background: var(--rotaid-dark-2);
    color: rgba(255, 255, 255, 0.4);
    cursor: not-allowed;
    opacity: 0.5;
    pointer-events: none;
}

.upload-btn.disabled:hover {
    background: var(--rotaid-dark-2);
    border-color: transparent;
}

.aed-analysis {
    display: flex;
    align-items: center;
    background: var(--rotaid-dark-2);
    border-radius: 1rem;
    padding: 1rem 1.25rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--rotaid-white);
    white-space: pre-wrap;
    word-break: break-word;
}

.aed-analysis[hidden] {
    display: none;
}

.aed-analysis.error {
    color: #ff8a8a;
}

.spinner {
    display: inline-block;
    flex: 0 0 auto;
    width: 1em;
    height: 1em;
    margin-right: 0.6rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--rotaid-white);
    border-radius: 50%;
    animation: aed-spinner-rotate 0.7s linear infinite;
}

.spinner[hidden] {
    display: none;
}

@keyframes aed-spinner-rotate {
    to {
        transform: rotate(360deg);
    }
}

/* Info grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.info-card {
    background: #f7faf8;
    border: 1px solid #e1e8e3;
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
}

.info-card h3 {
    margin-top: 0;
    color: var(--rotaid-dark);
    font-size: 1.1rem;
    border-bottom: 2px solid var(--rotaid-lime);
    display: inline-block;
    padding-bottom: 0.25rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: #5a6a62;
    font-size: 0.85rem;
}

.footer a {
    color: var(--rotaid-green);
}

/* Recognized AED overlay */
.overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.overlay[hidden] {
    display: none;
}

.overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(11, 61, 43, 0.55);
}

.overlay-card {
    position: relative;
    background: var(--rotaid-white);
    border-radius: 1rem;
    box-shadow: 0 20px 45px rgba(11, 61, 43, 0.35);
    padding: 2rem 2.5rem;
    max-width: 26rem;
    width: 100%;
    text-align: center;
}

.overlay-card h3 {
    margin: 0 0 1rem;
    color: var(--rotaid-dark);
    font-size: 1.4rem;
}

.overlay-brand-type {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--rotaid-green);
}

.overlay-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--rotaid-dark-2);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
}

.overlay-close:hover {
    color: var(--rotaid-dark);
}

/* Login overlay */
.login-hero {
    min-height: 100vh;
}

.login-overlay {
    position: fixed;
}

.login-card {
    max-width: 24rem;
}

.login-brand {
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--rotaid-dark);
    font-size: 1.3rem;
}

.login-subtitle {
    margin: 0 0 1.5rem;
    color: #5a6a62;
    font-size: 0.95rem;
}

.login-error {
    margin: 0 0 1.25rem;
    color: #c0392b;
    font-size: 0.9rem;
}

.login-form {
    text-align: left;
}

.login-form .field {
    margin-bottom: 1.25rem;
}

.login-submit {
    width: 100%;
    border: none;
    font-size: 1rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        min-height: auto;
    }

    .hero-content {
        margin: auto 0 6rem;
    }

    .panel {
        margin-top: -3.5rem;
    }
}

@media (max-width: 640px) {
    :root {
        font-size: 15px;
    }

    .navbar {
        padding: 1.25rem 1.25rem;
    }

    .brand {
        font-size: 1.15rem;
    }

    .hero-content {
        padding: 0 1.25rem;
        margin: auto 0 5.5rem;
    }

    .hero-content h1 {
        font-size: 1.9rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .panel-wrap {
        padding: 0 1rem;
    }

    .panel {
        padding: 1.5rem;
        margin-top: -3rem;
        border-radius: 0.75rem;
    }

    .panel h2 {
        font-size: 1.3rem;
    }

    .selectors {
        grid-template-columns: 1fr;
        margin-bottom: 1.5rem;
    }

    .uploads {
        flex-wrap: wrap;
        flex-direction: column;
    }

    .upload-btn {
        flex: 1 1 auto;
        min-width: auto;
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .info-card {
        padding: 1rem 1.25rem;
    }
}

@media (max-width: 400px) {
    .hero-content h1 {
        font-size: 1.6rem;
    }

    .hero-content {
        margin-bottom: 5rem;
    }

    .panel {
        margin-top: -2.5rem;
    }
}