/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #0a0a0a;
    --dark-gray: #1a1a1a;
    --medium-gray: #2a2a2a;
    --light-gray: #3a3a3a;
    --border-gray: #404040;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #ffffff;
    --success: #4ade80;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
    background: var(--black);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-gray);
    margin-bottom: 3rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
    flex: 1;
}

/* Upload Section */
.upload-section {
    margin-bottom: 2rem;
}

.upload-area {
    border: 2px dashed var(--border-gray);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--dark-gray);
}

.upload-area:hover {
    border-color: var(--accent);
    background: var(--medium-gray);
}

.upload-area.drag-over {
    border-color: var(--accent);
    background: var(--medium-gray);
    border-style: solid;
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.upload-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Image Preview */
.image-preview {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: var(--dark-gray);
    border: 1px solid var(--border-gray);
}

.image-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.remove-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.remove-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

/* Options Section */
.options-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.option-group select,
.option-group input {
    padding: 0.75rem 1rem;
    background: var(--dark-gray);
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: var(--transition);
    font-family: inherit;
}

.option-group select:focus,
.option-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--medium-gray);
}

.option-group select {
    cursor: pointer;
}

/* Buttons */
.analyze-btn {
    grid-column: 1 / -1;
    padding: 1rem 2rem;
    background: var(--accent);
    color: var(--black);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.analyze-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(255, 255, 255, 0.2);
}

.analyze-btn:active:not(:disabled) {
    transform: translateY(0);
}

.analyze-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-icon {
    transition: var(--transition);
}

.analyze-btn:hover:not(:disabled) .btn-icon {
    transform: translateX(4px);
}

/* Transition for sections */
.upload-section {
    transition: var(--transition);
}

.upload-section.hidden {
    display: none;
}

/* Back Button */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: transparent;
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.back-btn:hover {
    background: var(--medium-gray);
    border-color: var(--accent);
    transform: translateX(-4px);
}

.back-btn i {
    font-size: 0.875rem;
}

/* Analysis Container */
.analysis-container {
    /* Container for both loading and results */
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--dark-gray);
    border-radius: 12px;
    border: 1px solid var(--border-gray);
}

/* Cube Loader */
.cube-loader {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(-30deg) rotateY(45deg);
}

.cube {
    position: absolute;
    width: 45px;
    height: 45px;
    border: 2px solid var(--accent);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    box-shadow: 
        0 0 20px rgba(255, 255, 255, 0.1),
        inset 0 0 10px rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.cube1 {
    animation: buildCube1 2s ease-in-out infinite;
    left: 0;
    bottom: 0;
}

.cube2 {
    animation: buildCube2 2s ease-in-out infinite;
    right: 0;
    bottom: 0;
}

.cube3 {
    animation: buildCube3 2s ease-in-out infinite;
    left: 0;
    top: 0;
}

.cube4 {
    animation: buildCube4 2s ease-in-out infinite;
    right: 0;
    top: 0;
}

@keyframes buildCube1 {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    25% {
        transform: translateY(-60px) scale(0.8);
        opacity: 0.7;
    }
    50% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

@keyframes buildCube2 {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.7;
    }
    25%, 75% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-60px) scale(0.8);
        opacity: 0.7;
    }
}

@keyframes buildCube3 {
    0%, 50%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.7;
    }
    75% {
        transform: translateY(-60px) scale(0.8);
        opacity: 1;
    }
}

@keyframes buildCube4 {
    0% {
        transform: translateY(-60px) scale(0.8);
        opacity: 0.7;
    }
    25%, 75% {
        transform: translateY(0) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-60px) scale(0.8);
        opacity: 0.7;
    }
}

.loading p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-top: 1rem;
}

/* Results Section */
.results-section {
    background: var(--dark-gray);
    border-radius: 12px;
    border: 1px solid var(--border-gray);
    padding: 2rem;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-gray);
}

.results-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--medium-gray);
    border: 1px solid var(--border-gray);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--light-gray);
    border-color: var(--accent);
}

.results-content {
    line-height: 1.8;
    color: var(--text-primary);
}

/* Structured Analysis Sections */
.analysis-section {
    margin-bottom: 2rem;
}

.analysis-section:last-child {
    margin-bottom: 1.5rem;
}

.section-header {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-gray);
}

.section-content {
    font-size: 0.9375rem;
    line-height: 1.7;
}

.section-content p {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.section-content p:last-child {
    margin-bottom: 0;
}

.section-content strong {
    color: var(--accent);
    font-weight: 600;
}

.section-content ul {
    list-style: none;
    margin: 0.5rem 0;
    padding-left: 0;
}

.section-content li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    color: var(--text-secondary);
}

.section-content li::before {
    content: "›";
    position: absolute;
    left: 0.5rem;
    color: var(--accent);
    font-weight: bold;
}

.new-analysis-btn {
    width: 100%;
    padding: 0.875rem;
    background: transparent;
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1.5rem;
    display: none; /* Hide by default, not needed anymore */
}

.new-analysis-btn:hover {
    background: var(--medium-gray);
    border-color: var(--accent);
}

/* Footer */
.footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-gray);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .options-section {
        grid-template-columns: 1fr;
    }

    .results-section {
        padding: 1.5rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }
}