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

:root {
    --color-primary: #0f766e;
    --color-primary-light: #14b8a6;
    --color-dark: #1f2937;
    --color-gray: #6b7280;
    --color-gray-light: #f3f4f6;
    --color-white: #ffffff;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-border: #e5e7eb;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    --font-size-base: clamp(0.875rem, 2vw, 1rem);
    --font-size-lg: clamp(1rem, 2.5vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 3vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 4vw, 2.5rem);
    --font-size-3xl: clamp(2rem, 5vw, 3rem);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-dark);
    background-color: var(--color-white);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 4vw, 2rem);
}

/* Navigation */
.navbar {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: clamp(0.75rem, 2vw, 1.5rem) clamp(1rem, 4vw, 2rem);
    flex-wrap: wrap;
    gap: clamp(0.5rem, 2vw, 1.5rem);
}

.navbar-brand h1 {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--color-primary);
    margin-bottom: 0;
}

.navbar-brand .tagline {
    font-size: clamp(0.75rem, 1.5vw, 0.875rem);
    color: var(--color-gray);
    font-weight: 400;
    margin-bottom: 0;
}

.navbar-code {
    font-family: var(--font-mono);
    font-size: clamp(0.65rem, 1.5vw, 0.875rem);
    color: var(--color-gray);
    white-space: wrap;
}

.navbar-code code {
    background: none;
    padding: 0;
    border-radius: 0;
}

.navbar-code .comment {
    color: #6b7280;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-links a {
    color: var(--color-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    display: none;
}

/* Sections */
main {
    margin-bottom: 0;
}

section {
    padding: var(--spacing-xl) var(--spacing-lg);
}

section h2 {
    display: none;
}

.why-title {
    display: block;
}

.section-intro {
    font-size: 1.125rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* Content Grid */
.content-grid {
    display: none;
}

.content-card {
    background-color: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
}

.content-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.content-card p {
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
}

.content-card ul {
    list-style: none;
    padding-left: var(--spacing-md);
}

.content-card ul li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.content-card ul li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Account Model */
.account-model {
    display: none;
}

.account-structure {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.structure-item {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.structure-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.structure-item p {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.structure-item strong {
    color: var(--color-primary);
}

.structure-item em {
    color: var(--color-gray);
}

.structure-item code {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-dark);
    display: block;
    margin-top: var(--spacing-sm);
}

.account-note {
    background-color: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: var(--spacing-lg);
    border-radius: 4px;
    margin-top: var(--spacing-xl);
}

/* Credentials Section */
.credentials {
    display: none;
}

.credentials-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.flow-step {
    background-color: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
}

.flow-step h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.flow-step p {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.flow-step ul,
.flow-step ol {
    margin-left: var(--spacing-lg);
    color: var(--color-dark);
}

.flow-step li {
    margin-bottom: var(--spacing-sm);
}

.credentials-note {
    background-color: #dbeafe;
    border-left: 4px solid #3b82f6;
    padding: var(--spacing-lg);
    border-radius: 4px;
    margin-top: var(--spacing-xl);
}

/* Testimonial Quote */
.testimonial-quote {
    padding: clamp(1.5rem, 5vw, 2.5rem) clamp(1rem, 4vw, 2rem);
    text-align: center;
}

.testimonial-quote blockquote {
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-quote blockquote p {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 500;
    color: var(--color-primary);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.quote-author {
    display: inline;
    font-size: 0.5em;
    color: var(--color-gray);
    font-style: normal;
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-left: 0.5em;
    opacity: 0.7;
}

/* Security Matrix */
.security-matrix {
    background-color: var(--color-white);
    padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 4vw, 2rem);
}

.matrix-wrapper {
    overflow-x: auto;
    margin: clamp(1.5rem, 5vw, 3rem) 0;
}

.matrix {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.matrix thead {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.matrix th {
    padding: clamp(0.75rem, 2vw, 1.5rem);
    text-align: center;
    font-weight: 600;
    border: 1px solid var(--color-primary);
    font-size: clamp(0.75rem, 1.5vw, 0.95rem);
}

.matrix td {
    padding: clamp(0.75rem, 2vw, 1.5rem);
    text-align: center;
    border: 1px solid var(--color-border);
    font-size: clamp(0.75rem, 1.5vw, 0.95rem);
}

.matrix tbody tr:last-child td {
    border-bottom: 2px solid var(--color-border);
}

.matrix tbody tr {
    cursor: pointer;
    transition: transform 0.2s ease;
}

.matrix tbody tr:hover {
    transform: scale(1.02);
}

.matrix tbody tr:hover .info-icon {
    transform: scale(1.1);
}

.matrix tbody tr:nth-child(even) {
    background-color: #f9fafb;
}

/* GDPR Row Gold Highlight */
.matrix tbody tr.gdpr-highlight {
    background: linear-gradient(135deg, #ffecaf 20%,  #fef3c7 55%, #feefb5 100%);
    font-weight: 600;
    box-shadow: 
        0 0 15px rgba(217, 119, 6, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        inset 0 -1px 0 rgba(217, 119, 6, 0.05);
    position: relative;
}

.threat-name {
    text-align: left;
    font-weight: 600;
    color: var(--color-dark);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.matrix-icon {
    width: clamp(24px, 5vw, 32px);
    height: clamp(24px, 5vw, 32px);
    margin: 0 auto;
    display: block;
}

.matrix-icon.secure {
    color: #10b981;
}

.matrix-icon.warning {
    color: #f59e0b;
}

.matrix-icon.vulnerable {
    color: #ef4444;
}

.matrix-icon.neutral {
    color: var(--color-gray);
}

.info-btn {
    background: none;
    border: none;
    padding: clamp(0.375rem, 1vw, 0.5rem);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: clamp(0.5rem, 1vw, 1rem);
    min-width: 40px;
    min-height: 40px;
}

.info-icon {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
    transition: transform 0.2s ease;
}

.info-btn:hover .info-icon {
    transform: scale(1.1);
}

.matrix-legend {
    display: flex;
    justify-content: center;
    gap: clamp(1rem, 3vw, 3rem);
    margin: clamp(1.5rem, 5vw, 3rem) 0;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 1vw, 1rem);
    font-weight: 500;
    font-size: clamp(0.85rem, 1.5vw, 1rem);
}

.legend-icon {
    width: 24px;
    height: 24px;
}

.legend-item.color-secure {
    color: #10b981;
}

.legend-item.color-warning {
    color: #f59e0b;
}

.legend-item.color-vulnerable {
    color: #ef4444;
}

/* Modal - Hover Box */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    pointer-events: none;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
}

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

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 8px;
    max-width: 600px;
    max-height: 60vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--color-primary);
}

.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-light);
}

.modal-close {
    display: none;
}

#modal-body h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

#modal-body p {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

#modal-body ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: var(--spacing-md);
}

#modal-body li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

#modal-body li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: 1.5rem;
}

#modal-body strong {
    color: var(--color-primary);
}

#modal-body em {
    color: var(--color-gray);
}

/* Footer */
footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-md);
    margin-top: 0;
}

footer p {
    opacity: 0.8;
}

footer a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color 0.3s ease, text-decoration 0.3s ease;
}

footer a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

footer a:focus {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

/* Example Section - TCG Card */
.example-section {
    background-color: #f9fafb;
    padding: clamp(1.5rem, 5vw, 3rem) clamp(1rem, 4vw, 2rem);
    position: relative;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, pointer-events 0.3s ease;
}

.example-section.modal-overlay {
    background-color: rgba(107, 114, 128, 0.25);
    box-shadow: 
        inset 0 0 60px rgba(0, 0, 0, 0.15),
        0 0 0 9999px rgba(107, 114, 128, 0.15);
    pointer-events: none;
}

.example-header {
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: clamp(0.5rem, 1vw, 1rem);
    margin-bottom: clamp(1rem, 2vw, 1.5rem);
}

.example-title {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--color-primary);
    text-align: left;
    margin-bottom: 0;
    font-weight: 700;
}

.example-subtitle {
    font-size: clamp(0.85rem, 2vw, 0.95rem);
    color: var(--color-gray);
    text-align: left;
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
    margin-top: clamp(0.75rem, 1vw, 1rem);
}

/* Why Section */
.why-section {
    background-color: var(--color-white);
    padding: clamp(1.5rem, 5vw, 3rem) clamp(1rem, 4vw, 2rem);
    border-top: 1px solid var(--color-border);
}

.why-header {
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: clamp(0.5rem, 1vw, 1rem);
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
}

.why-title {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    color: var(--color-primary);
    text-align: center;
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
    font-weight: 700;
}

.why-statement {
    background-color: #f0fdf4;
    border-left: 4px solid var(--color-success);
    padding: clamp(1rem, 2vw, 1.5rem);
    border-radius: 6px;
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
}

.why-statement p {
    color: var(--color-dark);
    margin-bottom: clamp(0.75rem, 1vw, 1rem);
    line-height: 1.8;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
}

.why-statement p:last-child {
    margin-bottom: 0;
}

.why-statement .worst-case {
    font-style: italic;
    color: var(--color-primary);
    font-weight: 500;
}

.why-content {
    margin-top: clamp(1rem, 3vw, 1.5rem);
    text-align: justify;
    text-indent: clamp(0.75rem, 2vw, 1.5rem);
}

.why-content h6 {
    text-align: center;
}

.why-content code {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-dark);
}

.why-content .code-div {
    width: 100%;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.why-intro {
    font-size: 1rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.why-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.why-list li {
    background-color: var(--color-gray-light);
    padding: var(--spacing-md);
    border-radius: 6px;
    border-left: 3px solid var(--color-primary);
    color: var(--color-dark);
    font-size: 0.9rem;
    line-height: 1.6;
}

.why-list li strong {
    color: var(--color-primary);
    display: block;
    margin-bottom: 4px;
}

.example-card-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.tcg-card {
    background: linear-gradient(180deg, var(--color-white) 0%, #f9fafb 100%);
    border: 3px solid var(--color-primary);
    border-radius: 12px;
    width: 100%;
    max-width: 900px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    display: flex;
    flex-direction: row;
}

.card-layout {
    display: flex;
    flex-direction: row;
    gap: 0;
}

.card-left-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    background-color: #f9fafb;
    border-radius: 9px 0 0 9px;
}

.card-right-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-left: 2px solid var(--color-border);
    min-width: 0;
    box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.04);
    border-radius: 0 9px 9px 0;
}

.card-registration-section {
    width: 100%;
    padding: 0;
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
    justify-content: center;
    background-color: var(--color-white);
}

.registration-title {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-primary);
    margin: 0;
    font-weight: 700;
}

.registration-message {
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    color: var(--color-gray);
    margin: 0;
    line-height: 1.5;
}

/* Avatar Tier - Card Art */
.card-avatar-tier {
    background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
    padding: clamp(1rem, 3vw, 1.5rem);
    display: none;
    justify-content: center;
    align-items: center;
    min-height: clamp(140px, 25vw, 200px);
}

.avatar-circle {
    width: clamp(80px, 15vw, 120px);
    height: clamp(80px, 15vw, 120px);
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.95);
    border: 3px solid var(--color-white);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-placeholder {
    letter-spacing: 1px;
}

/* Status Tier */
.card-status-tier {
    padding: clamp(1rem, 2vw, 1.5rem);
    border-bottom: 2px solid var(--color-border);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: #f9fafb;
}

.status-title {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-primary);
    margin-bottom: clamp(0.5rem, 1vw, 0.75rem);
    font-weight: 700;
}

.status-message {
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    color: var(--color-gray);
    margin: 0;
}

/* Controls Tier */
.card-controls-tier {
    padding: clamp(1rem, 2vw, 1.5rem);
    display: flex;
    gap: clamp(0.75rem, 1.5vw, 1rem);
    border-bottom: 2px solid var(--color-border);
    flex-wrap: wrap;
    justify-content: center;
}

.phase-btn {
    flex: 1;
    min-width: 100px;
    padding: clamp(0.75rem, 1.5vw, 1rem) clamp(1rem, 2vw, 1.5rem);
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phase-btn:hover {
    background-color: var(--color-primary-light);
    transform: scale(1.02);
}

.phase-btn:active {
    transform: scale(0.98);
}

.phase-btn.logout {
    background-color: var(--color-danger);
}

.phase-btn.logout:hover {
    background-color: #dc2626;
}

/* Registration Form Tier */
.card-registration-tier {
    width: 100%;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
}

.email-input {
    padding: clamp(0.75rem, 1.5vw, 1rem);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    font-family: var(--font-family);
    transition: border-color 0.2s ease;
    min-height: 44px;
}

.email-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.submit-btn {
    width: 100%;
    padding: clamp(0.75rem, 1.5vw, 1rem);
    background-color: var(--color-success);
    color: var(--color-white);
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.submit-btn:hover {
    background-color: #059669;
    transform: scale(0.98);
}

.submit-btn:active {
    transform: scale(0.95);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.submit-btn.btn-loading {
    background-color: #0d9488;
    cursor: wait;
}

.submit-btn.btn-loading:hover {
    transform: none;
}

.submit-btn.btn-loading:active {
    transform: none;
}

.submit-btn-register {
    background-color: var(--color-danger);
}

.submit-btn-register:hover {
    background-color: #dc2626;
    transform: scale(0.98);
}

.submit-btn-register:active {
    transform: scale(0.95);
}

.submit-btn-check {
    background-color: #004d47;
}

.submit-btn-check:hover {
    background-color: #006662;
    transform: scale(0.98);
}

.submit-btn-check:active {
    transform: scale(0.95);
}

/* Technical Details Tier */
.card-technical-tier {
    padding: clamp(1rem, 2vw, 1.5rem);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.technical-title {
    font-size: clamp(0.8rem, 1.5vw, 0.95rem);
    color: var(--color-primary);
    margin-bottom: clamp(0.75rem, 1.5vw, 1rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.technical-content {
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
}

.technical-diagrams {
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
    align-items: center;
}

.technical-steps {
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
}

.auth-note-section {
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.08) 0%, rgba(20, 184, 166, 0.08) 100%);
    border: 1px solid var(--color-primary-light);
    border-radius: 8px;
    padding: clamp(1rem, 2vw, 1.5rem);
    margin-top: clamp(1rem, 2vw, 1.5rem);
    width: 100%;
}

.auth-note-section p {
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    color: var(--color-dark);
    line-height: 1.6;
    margin: 0;
}

.auth-note-section strong {
    color: var(--color-primary);
    font-weight: 600;
}

.flow-diagram {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: clamp(0.75rem, 1.5vw, 1rem);
    width: 100%;
    max-width: 400px;
}

.flow-svg {
    width: 100%;
    height: auto;
}

.flow-steps {
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 1.5vw, 1.5rem);
}

.step-item {
    display: flex;
    gap: clamp(0.75rem, 1.5vw, 1rem);
    align-items: flex-start;
    padding: clamp(0.5rem, 1vw, 1rem);
    background-color: var(--color-white);
    border-left: 3px solid var(--color-primary);
    border-radius: 4px;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(28px, 5vw, 32px);
    height: clamp(28px, 5vw, 32px);
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    font-weight: 700;
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    flex-shrink: 0;
}

.step-text {
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    color: var(--color-dark);
    line-height: 1.5;
    padding-top: 2px;
}

.step-text strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* ===== RESPONSIVE DESIGN - MOBILE FIRST ===== */

/* Mobile (480px and up) */
@media (max-width: 767px) {
    .navbar .container {
        padding: clamp(0.75rem, 2vw, 1rem) clamp(0.75rem, 3vw, 1rem);
        gap: clamp(0.375rem, 1.5vw, 0.75rem);
    }

    .navbar-brand {
        flex-basis: 100%;
        order: 1;
    }

    .navbar-code {
        flex-basis: 100%;
        order: 2;
        text-align: center;
        white-space: wrap;
        word-break: break-word;
        font-size: clamp(0.6rem, 1.2vw, 0.75rem);
    }

    /* Security Matrix - Convert to card layout */
    .matrix-wrapper {
        overflow-x: visible;
        margin: clamp(1rem, 3vw, 1.5rem) 0;
    }

    .matrix {
        border: none;
        border-radius: 0;
    }

    .matrix thead {
        display: none;
    }

    .matrix tbody {
        display: flex;
        flex-direction: column;
        gap: clamp(1rem, 2vw, 1.5rem);
    }

    .matrix tbody tr {
        display: grid;
        grid-template-columns: 1fr;
        gap: clamp(0.5rem, 1vw, 0.75rem);
        background-color: var(--color-white);
        border: 2px solid var(--color-border);
        border-radius: 8px;
        padding: clamp(1rem, 2vw, 1.5rem);
        transform: none !important;
    }

    .matrix tbody tr:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .matrix tbody tr:nth-child(even) {
        background-color: var(--color-white);
    }

    .matrix tbody tr.gdpr-highlight {
        background: linear-gradient(135deg, #ffecaf 20%, #fef3c7 55%, #feefb5 100%);
        border-color: #d97706;
    }

    .matrix tbody tr td {
        padding: clamp(0.5rem, 1vw, 0.75rem) 0;
        border: none;
        display: grid;
        grid-template-columns: 120px 1fr;
        gap: clamp(0.75rem, 1.5vw, 1rem);
        text-align: left;
        align-items: center;
    }

    .matrix tbody tr td:first-child {
        grid-column: 1 / -1;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: clamp(0.75rem, 1.5vw, 1rem);
        border-bottom: 2px solid var(--color-border);
        margin-bottom: clamp(0.5rem, 1vw, 0.75rem);
    }

    .matrix tbody tr td:first-child .info-btn {
        min-width: 40px;
        min-height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .matrix tbody tr td:not(:first-child)::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--color-primary);
        grid-column: 1 / 2;
        text-align: left;
    }

    /* Hide data-label for cells without it */
    .matrix tbody tr .threat-name {
        grid-column: 1 / -1;
    }

    .matrix-icon {
        grid-column: 2 / 3;
        justify-self: start;
        width: clamp(24px, 4vw, 28px);
        height: clamp(24px, 4vw, 28px);
    }

    .matrix-legend {
        gap: clamp(0.75rem, 2vw, 1rem);
        padding: 0 clamp(0.75rem, 2vw, 1rem);
    }

    .legend-item {
        gap: clamp(0.375rem, 1vw, 0.5rem);
        font-size: clamp(0.75rem, 1.2vw, 0.85rem);
    }

    /* TCG Card - Stack vertically */
    .tcg-card {
        flex-direction: column;
        max-width: 100%;
    }

    .card-layout {
        flex-direction: column;
    }

    .card-left-column,
    .card-right-column {
        flex: none;
        min-width: unset;
        border: none;
    }

    .card-right-column {
        border-top: 2px solid var(--color-border);
    }

    /* Technical Details on mobile */
    .card-technical-tier {
        padding: clamp(0.75rem, 1.5vw, 1rem);
    }

    .technical-title {
        font-size: clamp(0.7rem, 1.2vw, 0.8rem);
    }

    .flow-diagram {
        max-width: 100%;
        padding: clamp(0.5rem, 1vw, 0.75rem);
    }

    .technical-content {
        gap: clamp(0.5rem, 1.5vw, 1rem);
    }

    /* Device list - More compact */
    .device-list {
        padding: clamp(0.75rem, 1.5vw, 1rem);
    }

    .device-item {
        flex-direction: column;
        gap: clamp(0.5rem, 1vw, 0.75rem);
        padding: clamp(0.75rem, 1.5vw, 1rem);
    }

    .device-delete-btn {
        width: 100%;
        padding: clamp(0.5rem, 1vw, 0.75rem);
        margin-left: 0;
    }

    .device-info {
        width: 100%;
    }

    /* Auth buttons container */
    .auth-buttons-container {
        gap: clamp(0.5rem, 1vw, 0.75rem);
    }

    .submit-btn,
    .phase-btn {
        min-height: 48px;
    }

    section {
        padding: clamp(1rem, 3vw, 1.5rem) clamp(0.75rem, 2vw, 1rem);
    }

    .why-content {
        text-indent: clamp(0.5rem, 1.5vw, 1rem);
    }

    .modal-content {
        margin: clamp(0.5rem, 2vw, 1rem);
        max-width: 95%;
        padding: clamp(1rem, 2vw, 1.5rem);
    }

    .modal-close {
        font-size: clamp(1.5rem, 3vw, 2rem);
        top: clamp(0.75rem, 1.5vw, 1rem);
        right: clamp(0.75rem, 1.5vw, 1rem);
    }

    pre {
        font-size: clamp(0.7rem, 1.2vw, 0.85rem);
        padding: clamp(0.75rem, 1.5vw, 1rem);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    footer p {
        font-size: clamp(0.75rem, 1.2vw, 0.875rem);
    }
}

/* Tablet (768px and up) */
@media (min-width: 768px) {
    .navbar .container {
        gap: clamp(0.75rem, 2vw, 1.5rem);
    }

    .navbar-code {
        white-space: wrap;
    }

    /* Table still uses card layout on tablet */
    .matrix-wrapper {
        overflow-x: visible;
    }

    .matrix thead {
        display: none;
    }

    .matrix tbody {
        display: flex;
        flex-direction: column;
        gap: clamp(1rem, 2vw, 1.5rem);
    }

    .matrix tbody tr {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: clamp(0.75rem, 1.5vw, 1rem);
        background-color: var(--color-white);
        border: 2px solid var(--color-border);
        border-radius: 8px;
        padding: clamp(1rem, 2vw, 1.5rem);
    }

    .matrix tbody tr:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .matrix tbody tr td {
        padding: clamp(0.75rem, 1.5vw, 1rem);
        border: none;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: clamp(0.5rem, 1vw, 0.75rem);
        position: relative;
    }

    .matrix tbody tr td:not(:first-child)::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--color-primary);
        font-size: clamp(0.75rem, 1.2vw, 0.85rem);
        order: -1;
    }

    .matrix tbody tr td:first-child {
        grid-column: 1 / -1;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: clamp(0.75rem, 1.5vw, 1rem);
        border-bottom: 2px solid var(--color-border);
        margin-bottom: clamp(0.5rem, 1vw, 0.75rem);
    }

    .threat-name {
        grid-column: 1 / -1;
    }

    .matrix-icon {
        width: clamp(24px, 4vw, 32px);
        height: clamp(24px, 4vw, 32px);
    }

    /* TCG Card - Side by side */
    .tcg-card {
        flex-direction: row;
    }

    .card-left-column,
    .card-right-column {
        flex: 1;
        min-width: 0;
    }

    .card-right-column {
        border-left: 2px solid var(--color-border);
        border-top: none;
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    /* Security Matrix - Back to table view */
    .matrix-wrapper {
        overflow-x: auto;
    }

    .matrix thead {
        display: table-header-group;
        background-color: var(--color-primary);
        color: var(--color-white);
    }

    .matrix th {
        padding: clamp(1rem, 1.5vw, 1.5rem);
        text-align: center;
        font-weight: 600;
        border: 1px solid var(--color-primary);
        font-size: clamp(0.85rem, 1.2vw, 0.95rem);
    }

    .matrix tbody {
        display: table-row-group;
        gap: 0;
    }

    .matrix tbody tr {
        display: table-row;
        background-color: var(--color-white);
        border: none;
        padding: 0;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .matrix tbody tr:hover {
        transform: scale(1.02);
        box-shadow: none;
    }

    .matrix tbody tr:nth-child(even) {
        background-color: #f9fafb;
    }

    .matrix tbody tr td {
        padding: clamp(1rem, 1.5vw, 1.5rem);
        border: 1px solid var(--color-border);
        display: table-cell;
        flex-direction: row;
        text-align: center;
    }

    .matrix tbody tr td:first-child {
        grid-column: unset;
        display: table-cell;
        border: 1px solid var(--color-border);
        text-align: left;
        padding-bottom: clamp(1rem, 1.5vw, 1.5rem);
        border-bottom: 1px solid var(--color-border);
        margin-bottom: 0;
    }

    .threat-name {
        grid-column: unset;
    }

    .matrix-icon {
        width: clamp(28px, 2vw, 32px);
        height: clamp(28px, 2vw, 32px);
    }

    .navbar .container {
        flex-wrap: nowrap;
    }

    .navbar-code {
        white-space: nowrap;
    }

    section {
        padding: clamp(2rem, 5vw, 3rem) clamp(1rem, 4vw, 2rem);
    }
}

/* Extra large screens (1200px and up) */
@media (min-width: 1200px) {
    .navbar .container {
        justify-content: space-between;
    }

    .container {
        padding: 0 var(--spacing-lg);
    }

    section {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .matrix th,
    .matrix td {
        padding: var(--spacing-md);
    }
}

/* ===== AUTH BUTTONS & DEVICE LIST STYLES ===== */
.auth-buttons-container {
    display: flex;
    gap: var(--spacing-sm);
    flex-direction: column;
    margin-top: var(--spacing-md);
}

.submit-btn-danger {
    background-color: var(--color-danger);
    border-color: var(--color-danger);
}

.submit-btn-danger:hover {
    background-color: #dc2626;
    border-color: #dc2626;
}

.device-list {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-gray-light);
    border-radius: 0 0 8px 0;
    border: 1px solid var(--color-border);
}

.device-list h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-size: 0.95rem;
}

.device-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    transition: background-color 0.2s;
}

.device-item.current-device {
    background-color: #ecfdf5;
    border-color: var(--color-success);
}

.device-info {
    flex: 1;
}

.device-name {
    font-weight: 500;
    color: var(--color-dark);
    font-size: 0.95rem;
}

.device-meta {
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-top: 0.25rem;
}

.device-delete-btn {
    background-color: var(--color-danger);
    color: var(--color-white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color 0.2s;
    white-space: nowrap;
    margin-left: var(--spacing-sm);
}

.device-delete-btn:hover {
    background-color: #dc2626;
}

.device-delete-btn:active {
    background-color: #b91c1c;
}

.why-this-works p {
    text-align: justify;
    text-indent: 1.5rem;
    margin-bottom: unset !important;
}

/* ==================== STATUS BAR (STICKY) ==================== */
/* ==================== CODE BLOCK FORMATTING ==================== */
.code-div {
    margin: var(--spacing-lg) auto;
    max-width: 100%;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

pre {
    background-color: #f5f5f5;
    color: #333333;
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    overflow-x: auto;
    font-family: 'Fira Code', 'Monaco', 'Menlo', var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
    border: 1px solid #e0e0e0;
    text-align: left;
}

pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
    font-family: inherit;
    white-space: pre;
    word-break: normal;
    word-wrap: normal;
    display: block;
}

/* Syntax highlighting for JavaScript */
/* Keywords */
pre code :is(.kw, .keyword) { color: #0000ff; font-weight: 600; }
/* Strings */
pre code :is(.str, .string) { color: #a31515; }
/* Comments */
pre code :is(.cm, .comment) { color: #008000; }
/* Functions */
pre code :is(.fn, .function) { color: #795e26; }
/* Numbers */
pre code :is(.nb, .number) { color: #098658; }

/* Inline code (for regular code tags) */
code {
    background-color: #f0f0f0;
    color: #d32f2f;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'Fira Code', 'Monaco', 'Menlo', var(--font-mono);
    font-size: 0.9em;
    border: 1px solid #e0e0e0;
}

/* Don't style code inside pre */
pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    border: none;
}

.why-content code {
    text-indent: 0;
}