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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: #f0f4f0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px;
}

.container {
    background: white;
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(46, 125, 50, 0.12);
    max-width: 650px;
    width: 100%;
    padding: 30px;
    border: 1px solid #e8f5e9;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header {
    text-align: center;
    margin-bottom: 28px;
    padding-bottom: 0;
    border-bottom: none;
}

header h1 {
    color: #1b5e20;
    font-size: 2em;
    margin-bottom: 6px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

header p {
    color: #558b2f;
    font-size: 0.95em;
    font-weight: 500;
}

.upload-section {
    margin-top: 20px;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.btn {
    flex: 1;
    min-width: 140px;
    padding: 13px 18px;
    font-size: 0.95em;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* Main action buttons - all green */
.btn-camera,
.btn-upload {
    background: linear-gradient(135deg, #2e7d32 0%, #1b5e20 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.25);
}

.btn-camera:hover,
.btn-upload:hover {
    background: linear-gradient(135deg, #1b5e20 0%, #0d3817 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(46, 125, 50, 0.35);
}

.btn-camera:active,
.btn-upload:active {
    transform: translateY(0);
}

.btn-capture,
.btn-process {
    background: linear-gradient(135deg, #43a047 0%, #2e7d32 100%);
    color: white;
    border: none;
    flex: 1;
    min-width: 120px;
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.25);
}

.btn-capture:hover,
.btn-process:hover {
    background: linear-gradient(135deg, #2e7d32 0%, #1b5e20 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(46, 125, 50, 0.35);
}

.btn-capture:active,
.btn-process:active {
    transform: translateY(0);
}

/* Close and New buttons - red */
.btn-close,
.btn-new {
    background: #ffcdd2;
    color: #b71c1c;
    border: none;
    flex: 1;
    min-width: 120px;
    box-shadow: 0 2px 8px rgba(211, 47, 47, 0.15);
}

.btn-close:hover,
.btn-new:hover {
    background: #ef5350;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(211, 47, 47, 0.3);
}

.btn-close:active,
.btn-new:active {
    transform: translateY(0);
}

#cameraSection {
    margin-top: 20px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#video {
    width: 100%;
    border-radius: 16px;
    margin-bottom: 15px;
    border: 2px solid #e8f5e9;
    display: block;
    background: #000;
}

.camera-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.camera-controls .btn {
    flex: 1;
    min-width: 120px;
}

#previewSection {
    margin-top: 25px;
    text-align: center;
    animation: slideIn 0.3s ease;
}

#previewSection h3 {
    margin-bottom: 16px;
    color: #1b5e20;
    font-size: 1.1em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#preview {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    margin-bottom: 16px;
    box-shadow: 0 4px 16px rgba(46, 125, 50, 0.15);
    border: 2px solid #e8f5e9;
    display: block;
}

#canvas {
    display: none;
}

.hidden {
    display: none !important;
}

/* Loading Animation */
#loadingSection {
    text-align: center;
    padding: 40px 20px;
    animation: slideIn 0.3s ease;
}

.loader {
    border: 4px solid #e8f5e9;
    border-top: 4px solid #2e7d32;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loadingSection p {
    color: #1b5e20;
    font-size: 0.95em;
    font-weight: 500;
}

/* Results Section */
#resultsSection {
    margin-top: 25px;
    animation: slideIn 0.3s ease;
}

#resultsSection h3 {
    margin-bottom: 16px;
    color: #1b5e20;
    font-size: 1.1em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#resultsSection h4 {
    margin: 18px 0 12px 0;
    color: #1b5e20;
    font-size: 0.95em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

#results {
    background: #fafbfa;
    padding: 16px;
    border-radius: 14px;
    margin-bottom: 18px;
    text-align: left;
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid #e8f5e9;
}

.result-item {
    margin-bottom: 12px;
    padding: 14px;
    background: white;
    border-radius: 12px;
    border-left: 4px solid #43a047;
    box-shadow: 0 2px 6px rgba(46, 125, 50, 0.08);
}

.result-label {
    font-weight: 700;
    color: #1b5e20;
    display: inline-block;
    min-width: 120px;
    font-size: 0.9em;
}

.result-value {
    color: #2e7d32;
    font-size: 0.9em;
    font-weight: 600;
    word-break: break-word;
}

/* ========== CARBON FOOTPRINT SECTION - FIXED ========== */
.carbon-section {
    background: linear-gradient(135deg, #1b5e20 0%, #2e7d32 50%, #1b5e20 100%);
    color: #ffffff;
    padding: 24px;
    border-radius: 16px;
    margin-bottom: 20px;
    border: 2px solid #43a047;
    box-shadow: 0 8px 24px rgba(46, 125, 50, 0.35);
}

.carbon-section h3 {
    margin: 0 0 20px 0;
    font-size: 1.25em;
    color: #ffffff;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.carbon-section .result-item {
    background: rgba(0, 0, 0, 0.15);
    border-left: 4px solid #81c784;
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    padding: 14px;
    margin-bottom: 12px;
}

.carbon-section .result-label {
    color: #c8e6c9;
    font-weight: 700;
    min-width: 110px;
    font-size: 0.9em;
    display: inline-block;
}

.carbon-section .result-value {
    color: #ffffff;
    font-weight: 700;
    font-size: 1em;
    display: inline;
}

/* ========== END CARBON FOOTPRINT SECTION ========== */

.result-section {
    background: #f5f9f5;
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 15px;
    border: 1px solid #e0f2e0;
}

.result-section h4 {
    color: #1b5e20;
}

.breakdown-item {
    background: white !important;
    border-left: 4px solid #43a047 !important;
    margin-bottom: 10px;
    transition: all 0.2s ease;
    padding: 14px !important;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(46, 125, 50, 0.08);
}

.breakdown-item:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.15);
}

.breakdown-item div {
    margin: 5px 0;
    font-size: 0.9em;
}

.breakdown-item strong {
    color: #1b5e20;
    font-size: 0.95em;
    font-weight: 700;
}

.breakdown-item div:first-child {
    font-weight: 700;
    color: #1b5e20;
    font-size: 0.95em;
}

/* Scrollbar styling */
#results::-webkit-scrollbar {
    width: 8px;
}

#results::-webkit-scrollbar-track {
    background: #e8f5e9;
    border-radius: 10px;
}

#results::-webkit-scrollbar-thumb {
    background: #66bb6a;
    border-radius: 10px;
}

#results::-webkit-scrollbar-thumb:hover {
    background: #43a047;
}

/* Focus states */
.btn:focus {
    outline: 3px solid #c8e6c9;
    outline-offset: 2px;
}

/* ========== TABLET/MEDIUM SCREENS (768px and below) ========== */
@media (max-width: 768px) {
    body {
        padding: 15px;
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .container {
        padding: 22px;
        border-radius: 20px;
        max-width: 650px;
    }
    
    header {
        margin-bottom: 22px;
    }
    
    header h1 {
        font-size: 1.6em;
    }
    
    header p {
        font-size: 0.9em;
    }
    
    .button-group {
        gap: 10px;
        margin-bottom: 16px;
    }
    
    .btn {
        padding: 11px 14px;
        font-size: 0.9em;
        min-width: 120px;
    }
    
    #previewSection h3 {
        font-size: 1em;
    }
    
    #resultsSection h3 {
        font-size: 1em;
    }
    
    #resultsSection h4 {
        font-size: 0.9em;
    }
    
    .carbon-section {
        padding: 18px;
    }
    
    .carbon-section h3 {
        font-size: 1.15em;
        margin-bottom: 16px;
    }
}

/* ========== MOBILE/SMALL SCREENS (480px and below) ========== */
@media (max-width: 480px) {
    body {
        padding: 12px;
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .container {
        padding: 16px;
        border-radius: 18px;
        max-width: 100%;
    }
    
    header {
        margin-bottom: 18px;
    }
    
    header h1 {
        font-size: 1.4em;
        margin-bottom: 4px;
    }
    
    header p {
        font-size: 0.85em;
    }
    
    .button-group {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 14px;
    }
    
    .btn {
        padding: 12px 12px;
        font-size: 0.88em;
        min-width: 100%;
        width: 100%;
        flex: 1 1 100%;
    }
    
    .camera-controls {
        flex-direction: column;
        gap: 8px;
    }
    
    .camera-controls .btn {
        width: 100%;
    }
    
    #previewSection h3 {
        font-size: 0.95em;
        margin-bottom: 12px;
    }
    
    #resultsSection h3 {
        font-size: 0.95em;
    }
    
    #resultsSection h4 {
        font-size: 0.85em;
        margin: 14px 0 8px 0;
    }
    
    #results {
        padding: 12px;
        max-height: 400px;
    }
    
    .result-item {
        padding: 11px;
        margin-bottom: 8px;
    }
    
    .result-label {
        display: block;
        min-width: auto;
        margin-bottom: 3px;
        font-size: 0.8em;
    }
    
    .result-value {
        display: block;
        font-size: 0.8em;
    }
    
    .breakdown-item {
        padding: 10px !important;
        margin-bottom: 8px;
    }
    
    .breakdown-item div {
        font-size: 0.8em;
        margin: 3px 0;
    }
    
    .carbon-section {
        padding: 14px;
        margin-bottom: 14px;
        border-radius: 14px;
    }
    
    .carbon-section h3 {
        font-size: 1.05em;
        margin-bottom: 12px;
    }
    
    .carbon-section .result-label {
        min-width: 80px;
        font-size: 0.8em;
    }
    
    .carbon-section .result-value {
        font-size: 0.85em;
    }
    
    .loader {
        width: 45px;
        height: 45px;
        border: 3px solid #e8f5e9;
        border-top: 3px solid #2e7d32;
    }
    
    #loadingSection p {
        font-size: 0.9em;
    }
}

/* ========== EXTRA SMALL PHONES (< 360px) ========== */
@media (max-width: 359px) {
    header h1 {
        font-size: 1.2em;
    }
    
    .btn {
        font-size: 0.8em;
        padding: 10px 10px;
    }
    
    .result-label {
        font-size: 0.75em;
    }
    
    .result-value {
        font-size: 0.75em;
    }
    
    .carbon-section .result-label {
        min-width: 70px;
    }
}