:root {
    --primary-bg: #1A202C;
    --secondary-bg: #2D3748;
    --accent-color: #007BFF;
    --accent-green: #15a349;
    --accent-hover-color: #0056b3;
    --text-color: #F7FAFC;
    --secondary-text-color: #A0AEC0;
    --border-color: #4A5568;
    --font-family: 'Inter', sans-serif;
    --severity-critical-bg: rgba(239, 68, 68, 0.1);
    --severity-critical-fg: #f87171;
    --severity-warning-bg: rgba(245, 158, 11, 0.1);
    --severity-warning-fg: #fbbf24;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(0, 123, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 123, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: pan-background 30s linear infinite;
}

@keyframes pan-background {
    0% {
        background-position: 0% 0%;
    }
    100% {
        background-position: 100% 100%;
    }
}


#root {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    isolation: isolate; /* Create new stacking context */
}

main {
    flex-grow: 1;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 6rem 0;
    scroll-margin-top: 80px; /* Offset for sticky header */
}

section.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

section.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

h1, h2, h3 {
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    text-align: center;
    margin-bottom: 3rem;
}

p {
    color: var(--secondary-text-color);
    max-width: 65ch;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    z-index: 1000;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header.scrolled {
    background-color: rgba(26, 32, 44, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: block;
    width: 120px;
    height: auto;
    color: var(--text-color);
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-svg {
    width: 100%;
    height: auto;
    display: block;
}


.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--secondary-text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}


.nav-links a:hover {
    color: var(--text-color);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}


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

.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.2);
}

.btn-secondary {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--border-color);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}


/* Hero Section */
.hero {
    min-height: calc(80vh - 80px); /* 80px is approx header height */
    display: flex;
    align-items: center;
    text-align: center;
    padding: 4rem 0;
    background-image:
        radial-gradient(circle at 15% 25%, rgba(0, 123, 255, 0.1), transparent 30%),
        radial-gradient(circle at 85% 75%, rgba(0, 123, 255, 0.08), transparent 40%);
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.hero-content h1 {
    max-width: 20ch;
}

.hero-content p {
    font-size: 1.25rem;
    max-width: 60ch;
    margin-bottom: 1rem;
}

/* Problem Section */
.problem-section {
    background-color: var(--secondary-bg);
}

.problem-content {
    text-align: center;
    margin-bottom: 4rem;
}
.problem-content p {
    margin: 1rem auto 0;
}

.problem-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    text-align: left;
}

.problem-column {
    background-color: var(--primary-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.problem-column:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}


.problem-column .icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.problem-column h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

/* Solution Section */
.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.solution-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}
.solution-text p {
    margin-bottom: 1rem;
}

.solution-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    background-color: var(--secondary-bg);
    padding: 2rem;
    border-radius: 12px;
}

.diagram-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--primary-bg);
    width: 100%;
    max-width: 300px;
}
.diagram-item .icon {
    width: 32px;
    height: 32px;
    color: var(--accent-color);
    flex-shrink: 0;
}

.diagram-item-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: 300px;
}
.diagram-logo-container {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--primary-bg);
    width: 100%;
}

.diagram-arrow {
    width: 24px;
    height: 24px;
    color: var(--secondary-text-color);
    transform: rotate(90deg);
}


/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 123, 255, 0.1);
}

.feature-card .icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card .benefit {
    margin-top: 1.5rem;
    font-style: italic;
    color: var(--text-color);
    font-weight: 500;
    background-color: rgba(0, 123, 255, 0.05);
    padding: 0.75rem;
    border-radius: 6px;
    border-left: 3px solid var(--accent-color);
}

/* Tools Section */
.tools-section {
    background-color: var(--secondary-bg);
}
.tools-section .container > p {
     text-align: center;
     margin: 0 auto 3rem;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}
.tool-item {
    background-color: var(--primary-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.tool-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.tool-item .icon {
    width: 56px;
    height: 56px;
    color: var(--accent-color);
}
.tool-item span {
    font-weight: 600;
    color: var(--text-color);
}


/* How It Works Section */
.how-it-works-steps {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.how-it-works-steps::before {
    content: '';
    position: absolute;
    top: 2rem;
    bottom: 2rem;
    left: 40px;
    width: 2px;
    background: var(--border-color);
}


.step {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    position: relative;
}

.step-number {
    font-size: 4rem;
    font-weight: 900;
    color: var(--accent-color);
    opacity: 0.3;
    line-height: 1;
    min-width: 80px;
    text-align: center;
}

.step-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.small-note {
    font-size: 0.875rem;
    color: var(--secondary-text-color);
    margin-top: 0.75rem;
    font-style: italic;
}

.text-center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

/* AI Assistant Section */
.ai-assistant-wrapper {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 0;
    overflow: hidden;
    border-radius: 12px;
}

.ai-assistant-section.standalone {
    padding: 4rem 0;
    min-height: calc(100vh - 80px - 75px); /* vh - header - footer */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: none;
    background: transparent;
}

.ai-assistant-section.standalone .container {
    width: 100%;
    max-width: 800px;
}

/* New Analyzer Layout */
main.main-analyzer {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    overflow: hidden; /* Important for preventing double scrollbars */
}

.analyzer-container {
    display: flex;
    flex-direction: row;
    gap: 0; /* Let splitter control gap */
    width: 100%;
    flex-grow: 1;
    overflow: hidden; /* Children will manage their own scrolling */
}

.image-viewer-panel {
    display: flex;
    flex-direction: column; /* Stack controls and viewer */
    background-color: var(--primary-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
    min-width: 0;
}

.chat-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    flex-shrink: 0;
    min-width: 0;
}

.chat-panel .ai-assistant-wrapper {
    flex-grow: 1;
}

.splitter {
    flex-basis: 5px;
    flex-shrink: 0;
    background-color: var(--border-color);
    cursor: col-resize;
    transition: background-color 0.2s ease;
}
.splitter:hover {
    background-color: var(--accent-color);
}


@media (max-width: 1024px) {
    main.main-analyzer {
        padding: 1rem;
    }
    .analyzer-container {
        flex-direction: column;
        height: auto;
        gap: 1.5rem;
    }
    .image-viewer-panel {
        flex-basis: auto !important; /* Override inline style */
        height: 50vh;
        min-height: 400px;
    }
    .chat-panel {
        flex-basis: auto !important; /* Override inline style */
        height: 60vh;
    }
    .splitter {
        display: none;
    }
}

/* Custom Gerber Viewer */
.gerber-viewer-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    background-color: #000;
    overflow: hidden;
    position: relative;
}

.gerber-viewer-svg {
    flex-grow: 1;
    height: 100%;
    cursor: grab;
}

.gerber-viewer-svg:active {
    cursor: grabbing;
}

.gerber-layer-controls {
    flex-shrink: 0;
    width: 220px;
    background-color: var(--primary-bg);
    padding: 1rem;
    overflow-y: auto;
    border-left: 1px solid var(--border-color);
}

.gerber-layer-controls h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.layer-control-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}
.layer-control-item:hover {
    background-color: var(--secondary-bg);
}

.layer-control-item input {
    cursor: pointer;
}

.layer-color-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.layer-name {
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Gerber Viewer Preview Mode */
.gerber-viewer-wrapper.gerber-preview-mode {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gerber-preview-image-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.gerber-preview-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.5);
}

.gerber-preview-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(26, 32, 44, 0.7);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    border-radius: 12px;
}

.gerber-viewer-wrapper.gerber-preview-mode:hover .gerber-preview-overlay {
    opacity: 1;
}

.gerber-preview-overlay .btn {
    transform: scale(0.9);
    transition: transform 0.3s ease-in-out;
}

.gerber-viewer-wrapper.gerber-preview-mode:hover .gerber-preview-overlay .btn {
    transform: scale(1);
}


/* Uploader Styles */
.uploader-wrapper {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.uploader-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.3s ease, background-color 0.3s ease;
    background-color: var(--secondary-bg);
}

.uploader-dropzone:hover, .uploader-dropzone.dragging {
    border-color: var(--accent-color);
    background-color: var(--primary-bg);
}

.uploader-dropzone.loading {
    cursor: not-allowed;
    opacity: 0.7;
}

.uploader-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--secondary-text-color);
}
.uploader-state .icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
}
.uploader-state span {
    font-weight: 600;
    color: var(--text-color);
}
.uploader-state p {
    font-size: 0.875rem;
    margin: 0;
    color: var(--secondary-text-color);
}

.spinner-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.uploader-error-message {
    color: #f87171; /* Light red */
    text-align: center;
    margin-top: 0;
}

.uploader-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

/* Analysis Settings Form */
.analysis-settings-form {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: left;
}

.analysis-settings-form .form-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.analysis-settings-form .form-header .icon {
    width: 24px;
    height: 24px;
    color: var(--text-color);
}

.analysis-settings-form .form-header h3 {
    font-size: 1.25rem;
    margin: 0;
    font-weight: 700;
    color: var(--text-color);
}

.analysis-settings-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.analysis-settings-form .form-group input,
.analysis-settings-form .form-group select {
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 0.6rem 0.8rem;
    font-family: inherit;
    font-size: 1rem;
    color: #333;
    width: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.analysis-settings-form .form-group select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.analysis-settings-form .form-group input:focus,
.analysis-settings-form .form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.btn-start-analysis {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background-color: #5a6679; /* A neutral gray */
    color: white;
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    margin-top: 0.5rem;
}

.btn-start-analysis:hover:not(:disabled) {
    background-color: #4b5563; /* Darker gray on hover */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.btn-start-analysis .icon {
    width: 20px;
    height: 20px;
}



/* Chat Styles */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-window {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    padding: 0.75rem 1.25rem;
    border-radius: 18px;
    max-width: 80%;
    line-height: 1.5;
    word-wrap: break-word;
    animation: fadeInUp 0.4s ease-out;
}
.message > *:first-child { margin-top: 0; }
.message > *:last-child { margin-bottom: 0; }


.message.user {
    background-color: var(--accent-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.model {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 100%;
}
.message.model p {
    color: var(--secondary-text-color);
}
.message.model a {
    color: var(--accent-color);
}
.message.model code {
    background-color: var(--primary-bg);
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    border-radius: 6px;
    color: var(--text-color);
}
.message.model pre {
    background-color: #161b25;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.message.model pre code {
    padding: 0;
    background: none;
    font-size: 100%;
    color: #e5e7eb;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}
.message.model ul, .message.model ol {
    padding-left: 20px;
}

/* --- AI Report Formatting --- */
.message.model h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
    margin-top: 1rem;
    border-bottom: 1px solid var(--border-color);
}
.message.model h3:first-child {
    margin-top: 0;
}

.message.model > li {
    list-style: none;
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.message.model > li:hover {
    background-color: rgba(45, 55, 72, 0.5);
    border-color: var(--accent-color);
    cursor: default;
}

.message.model > li p:first-of-type {
    margin-top: 0;
}
.message.model > li p:last-of-type {
    margin-bottom: 0;
}

.message.model > li strong:first-child {
    font-size: 1.2rem;
    color: var(--text-color);
}

.message.model > li strong[style*="Severity: Critical"] {
    color: var(--severity-critical-fg);
    background-color: var(--severity-critical-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

.message.model > li strong[style*="Severity: Warning"] {
    color: var(--severity-warning-fg);
    background-color: var(--severity-warning-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

.chat-input-form {
    display: flex;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    flex-shrink: 0;
}

.chat-input-container {
    display: flex;
    gap: 0.5rem;
    width: 100%;
    max-width: 840px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.chat-input {
    flex-grow: 1;
    background-color: var(--primary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    line-height: 1.5;
    max-height: 150px; /* Limit auto-growing height */
    overflow-y: auto;
}
.chat-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.send-btn {
    flex-shrink: 0;
    padding: 0;
    align-self: flex-end;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.send-btn .icon {
    width: 24px;
    height: 24px;
}
.typing-indicator {
    align-self: flex-start;
    color: var(--secondary-text-color);
    font-style: italic;
    padding: 0.75rem 1.25rem;
}


/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--secondary-bg), var(--primary-bg));
    text-align: center;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-section .container {
    max-width: 800px;
}

.cta-section h2 {
    color: var(--text-color);
}
    
.cta-section p {
    margin: 1rem auto 0;
}

.cta-form {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-form input {
    flex-grow: 1;
    background-color: var(--primary-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
    
.cta-form input::placeholder {
    color: var(--secondary-text-color);
}

.cta-form input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}
    
.cta-form button {
    flex-shrink: 0;
}
    
.social-proof {
    margin-top: 1.5rem !important;
    font-size: 0.875rem;
    color: var(--secondary-text-color);
}

/* Support Section */
.support-section {
    background-color: var(--secondary-bg);
}

.support-section .container {
    max-width: 700px;
    text-align: center;
}
.support-section p {
    margin: 0 auto 2.5rem;
}

.support-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
}
.form-group {
    display: flex;
    flex-direction: column;
}
.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--secondary-text-color);
}
.form-group input,
.form-group textarea {
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
.support-form button {
    align-self: center;
    width: fit-content;
}

/* Form Messages */
.form-success-message {
    text-align: center;
    padding: 2rem;
    border: 1px solid var(--accent-green);
    background-color: rgba(21, 163, 73, 0.1);
    border-radius: 12px;
}
.form-success-message h3 {
    color: var(--accent-green);
    margin-bottom: 0.5rem;
}
.form-error-message {
    color: #f87171; /* A light red color */
    margin-top: 1rem;
    text-align: center;
}


/* Footer */
.footer {
    padding: 2rem 0;
    background-color: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.footer-links a, .link-button {
    color: var(--secondary-text-color);
    text-decoration: none;
    transition: color 0.3s ease;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    padding: 0;
}

.footer-links a:hover, .link-button:hover {
    color: var(--text-color);
}
.footer-links .icon {
    width: 24px;
    height: 24px;
}

/* Modal styles */
body.modal-open {
    overflow: hidden;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1.5rem;
    animation: fadeIn 0.3s ease-out;
}

.modal {
    background-color: var(--secondary-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: scaleIn 0.3s ease-out;
    overflow: hidden; /* Ensures child elements respect border-radius */
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.modal-header h2 {
    font-size: 1.5rem;
    margin: 0;
    text-align: left;
}

.modal-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary-text-color);
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.modal-close-btn:hover {
    background-color: var(--border-color);
    color: var(--text-color);
}

.modal-close-btn .icon {
    width: 24px;
    height: 24px;
}

.modal-content {
    padding: 1.5rem;
    overflow-y: auto;
    flex-grow: 1;
}

.modal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    color: var(--text-color);
}
.modal-content h4 {
    margin-bottom: 1rem;
    font-weight: 500;
    color: var(--secondary-text-color);
}

.modal-content p {
    color: var(--secondary-text-color);
    max-width: none;
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Simple hiding for this example, could be a hamburger menu */
    }
    .solution-content {
        grid-template-columns: 1fr;
    }
    .diagram-arrow {
        transform: rotate(90deg);
    }
    .how-it-works-steps::before {
       left: 30px;
    }
    .step-number {
        font-size: 3rem;
        min-width: 60px;
    }
    .cta-form {
        flex-direction: column;
        gap: 1rem;
    }
    .cta-form button {
        width: 100%;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .message {
        max-width: 90%;
    }
}