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

:root {
    --green: #5a7a3a;
    --green-dark: #3d5a25;
    --green-light: #e8f0de;
    --bg: #fafaf8;
    --text: #333;
    --text-light: #777;
    --border: #ddd;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-text-size-adjust: 100%;
}

#app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
}

/* Screens */
.screen {
    display: none;
    padding: 24px 20px;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

.screen-content {
    width: 100%;
}

.screen-content.centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
}

/* Typography */
h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--green-dark);
    margin-bottom: 8px;
}

h2 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.subtitle {
    color: var(--text-light);
    margin-bottom: 24px;
    font-size: 15px;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--green);
    color: #fff;
    border: none;
    padding: 16px 32px;
    border-radius: var(--radius);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    max-width: 320px;
    text-align: center;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

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

.btn-secondary {
    display: inline-block;
    background: #fff;
    color: var(--green);
    border: 2px solid var(--green);
    padding: 14px 32px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    max-width: 320px;
    text-align: center;
    -webkit-tap-highlight-color: transparent;
}

.btn-secondary:active {
    background: var(--green-light);
}

.btn-back {
    background: none;
    border: none;
    color: var(--green);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 0;
    margin-bottom: 8px;
    -webkit-tap-highlight-color: transparent;
}

/* Input */
input[type="password"] {
    width: 100%;
    max-width: 320px;
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 17px;
    margin-bottom: 16px;
    text-align: center;
    outline: none;
}

input[type="password"]:focus {
    border-color: var(--green);
}

/* Item list (projects, areas) */
.item-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.item-card {
    background: #fff;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    cursor: pointer;
    transition: border-color 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.item-card:active {
    border-color: var(--green);
    background: var(--green-light);
}

.item-card .item-name {
    font-size: 17px;
    font-weight: 600;
}

.item-card .item-meta {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

/* Plant table */
.plant-table {
    margin-bottom: 20px;
}

.plant-row {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 6px;
}

.plant-row .plant-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.plant-row .plant-common {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 4px;
    font-style: italic;
}

.plant-row .plant-details {
    font-size: 13px;
    color: var(--text-light);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.plant-row .plant-details span {
    background: var(--green-light);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Prompt editor */
.prompt-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    text-align: left;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#prompt-input {
    width: 100%;
    max-width: 360px;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.4;
    resize: vertical;
    outline: none;
    margin-bottom: 16px;
}

#prompt-input:focus {
    border-color: var(--green);
}

#prompt-section {
    width: 100%;
    max-width: 360px;
}

/* Upload area */
.upload-area {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 360px;
    aspect-ratio: 4 / 3;
    border: 3px dashed var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    overflow: hidden;
    margin-bottom: 20px;
    -webkit-tap-highlight-color: transparent;
}

.upload-area:active {
    border-color: var(--green);
}

#upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 16px;
}

.upload-icon {
    font-size: 48px;
}

#photo-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Result image */
#result-image {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 320px;
}

/* Spinner */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error */
.error {
    color: #c0392b;
    font-size: 14px;
    margin-top: 8px;
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Responsive tweaks */
@media (min-width: 500px) {
    #app {
        padding: 0 20px;
    }
}