/* ===================================
   IoT Playground - Modern Theme Styles
   =================================== */

:root {
    /* Color Palette - Tech/IoT Theme */
    --primary-dark: #0a0e27;
    --secondary-dark: #141b3d;
    --accent-blue: #00d4ff;
    --accent-cyan: #00ffff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --text-light: #e5e7eb;
    --text-muted: #9ca3af;
    --card-bg: rgba(20, 27, 61, 0.8);
    --card-border: rgba(0, 212, 255, 0.2);
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --error-red: #ef4444;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* ===================================
   Global Styles
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    background: var(--primary-dark);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Animated Background */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    overflow: hidden;
}

.background-animation::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
    animation: backgroundMove 20s ease-in-out infinite;
}

@keyframes backgroundMove {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-50px, -50px); }
}

/* Grid Pattern Overlay */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

/* ===================================
   Container
   =================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header/Navigation
   =================================== */

header {
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue); /* Fallback for non-webkit browsers */
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-normal);
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue);
    transition: width var(--transition-normal);
}

nav a:hover {
    color: var(--accent-blue);
}

nav a:hover::after {
    width: 100%;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--accent-blue); /* Fallback for non-webkit browsers */
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInDown 0.8s ease-out;
}

.hero .subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-description {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

/* ===================================
   Firmware Flasher Section
   =================================== */

.firmware-flasher-section {
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.firmware-flasher-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.firmware-flasher-container h2 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-blue);
}

.firmware-flasher-container > p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.selection-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.selector-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.selector-container label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.project-selector,
.version-selector {
    padding: 0.875rem 1rem;
    background: rgba(10, 14, 39, 0.6);
    border: 2px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-light);
    font-size: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.project-selector:focus,
.version-selector:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.project-selector:disabled,
.version-selector:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.firmware-input {
    flex: 1;
    padding: 1rem 1.5rem;
    background: rgba(10, 14, 39, 0.6);
    border: 2px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-light);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.firmware-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.firmware-input::placeholder {
    color: var(--text-muted);
}

.firmware-feedback {
    min-height: 24px;
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
}

.firmware-feedback.success {
    color: var(--success-green);
}

.firmware-feedback.error {
    color: var(--error-red);
}

.firmware-feedback.info {
    color: var(--accent-blue);
}

.flashing-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.flash-btn {
    position: relative;
    overflow: hidden;
}

.flash-btn::after {
    content: '⚡';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-size: 3rem;
    opacity: 0;
    transition: all 0.3s ease;
}

.flash-btn:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.2;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--error-red);
    animation: pulse-indicator 2s ease-in-out infinite;
}

.connection-status.connected .status-indicator {
    background: var(--success-green);
}

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

.status-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
}

.device-info {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.device-info h4 {
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.device-info p {
    color: var(--text-muted);
    margin: 0.25rem 0;
    font-size: 0.9rem;
}

.progress-section {
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    font-weight: 500;
}

.progress-bar-container {
    width: 100%;
    height: 24px;
    background: rgba(10, 14, 39, 0.8);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    border-radius: var(--radius-md);
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.console-output {
    background: rgba(10, 14, 39, 0.8);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.console-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 212, 255, 0.1);
    border-bottom: 1px solid var(--card-border);
    color: var(--accent-blue);
    font-weight: 500;
    font-size: 0.9rem;
}

.btn-clear {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
}

.btn-clear:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.console-log {
    padding: var(--spacing-md);
    max-height: 300px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-light);
}

.console-log::-webkit-scrollbar {
    width: 8px;
}

.console-log::-webkit-scrollbar-track {
    background: rgba(10, 14, 39, 0.5);
}

.console-log::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 4px;
}

.console-log::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

.console-line {
    margin: 0.25rem 0;
    padding: 0.25rem 0;
}

.console-line.info {
    color: var(--accent-cyan);
}

.console-line.success {
    color: var(--success-green);
}

.console-line.error {
    color: var(--error-red);
}

.console-line.warning {
    color: var(--warning-yellow);
}

.examples-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--card-border);
}

.examples-section h3 {
    color: var(--accent-blue);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.example-btn {
    padding: 0.875rem 1rem;
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-light);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
    font-weight: 500;
}

.example-btn:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

/* ===================================
   Features Section
   =================================== */

.features-section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--accent-blue); /* Fallback for non-webkit browsers */
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(168, 85, 247, 0.05));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-blue); /* Fallback for non-webkit browsers */
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===================================
   Projects Section
   =================================== */

.projects-section {
    padding: var(--spacing-2xl) 0;
}

.device-category {
    margin-bottom: var(--spacing-2xl);
}

.device-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid rgba(0, 212, 255, 0.2);
}

.device-header h2 {
    font-size: 2rem;
    color: var(--text-light);
}

.device-badge {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(168, 85, 247, 0.2));
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-blue);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1), transparent);
    transform: translate(50%, -50%);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.25);
}

.project-card:hover::after {
    transform: translate(30%, -30%) scale(1.5);
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.project-card p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.flash-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.flash-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.flash-button:hover::before {
    width: 300px;
    height: 300px;
}

.flash-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

/* ===================================
   Requirements Section
   =================================== */

.requirements-section {
    padding: var(--spacing-xl) 0;
    margin: var(--spacing-2xl) 0;
}

.requirements-box {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(239, 68, 68, 0.1));
    border: 2px solid var(--warning-yellow);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.requirements-box h3 {
    color: var(--warning-yellow);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.requirements-box ul {
    list-style: none;
    padding: 0;
}

.requirements-box li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: rgba(10, 14, 39, 0.5);
    border-radius: var(--radius-sm);
    position: relative;
    padding-left: 2.5rem;
}

.requirements-box li::before {
    content: '⚡';
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
}

/* ===================================
   Footer
   =================================== */

footer {
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

footer a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: all var(--transition-normal);
}

footer a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.footer-credits {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===================================
   Animations
   =================================== */

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .selection-group {
        grid-template-columns: 1fr;
    }
    
    .flashing-controls {
        flex-direction: column;
    }
    
    .flashing-controls .btn {
        width: 100%;
        justify-content: center;
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .device-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .firmware-flasher-container {
        padding: var(--spacing-md);
    }
}

/* ===================================
   Utility Classes
   =================================== */

.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none;
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}