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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 16px;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: 16px;
    line-height: 1.6;
}

/* Header and Navigation */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.nav {
    padding: 16px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-logo a:hover {
    color: #1d4ed8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    padding: 8px 0;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: #2563eb;
    border-radius: 1px;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 200px;
    z-index: 1001;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 16px;
    color: #4b5563;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.dropdown-menu a:hover {
    background-color: #f3f4f6;
    color: #2563eb;
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 24px;
    height: 3px;
    background: #4b5563;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

.btn-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #2563eb;
    border-color: #2563eb;
}

.btn-secondary:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

/* Hero Sections */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%232563eb" fill-opacity="0.03"><circle cx="30" cy="30" r="2"/></g></svg>');
    z-index: 0;
}

.hero-secondary {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #1e40af 0%, #0891b2 100%);
    color: white;
}

.hero-secondary::before {
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><circle cx="30" cy="30" r="2"/></g></svg>');
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 64px;
    min-height: 500px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #2563eb, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-secondary .hero-title {
    color: white;
    background: none;
    -webkit-text-fill-color: white;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 32px;
    color: #6b7280;
    max-width: 600px;
}

.hero-secondary .hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #2563eb, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 48px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.bg-light {
    background-color: #f8fafc;
}

/* Grid Layouts */
.pitch-grid,
.highlights-grid,
.platform-grid,
.solutions-grid,
.research-grid,
.ethics-grid,
.partnership-types,
.benefits-grid,
.values-grid,
.innovation-grid,
.compliance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.research-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.benefits-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Cards */
.pitch-card,
.highlight-card,
.platform-card,
.solution-card,
.research-card,
.ethics-card,
.partnership-card,
.benefit-card,
.value-card,
.innovation-card,
.compliance-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.pitch-card:hover,
.highlight-card:hover,
.platform-card:hover,
.solution-card:hover,
.research-card:hover,
.ethics-card:hover,
.partnership-card:hover,
.benefit-card:hover,
.value-card:hover,
.innovation-card:hover,
.compliance-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.pitch-icon,
.benefit-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    display: block;
}

.research-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    text-align: center;
}

/* Solutions Page Specific */
.solutions-tabs {
    margin-top: 48px;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: #f3f4f6;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    color: #6b7280;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background: #2563eb;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

/* Process Flow */
.process-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.process-step {
    text-align: center;
    padding: 32px 24px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
    position: relative;
}

.process-step:hover {
    transform: translateY(-8px);
}

.step-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563eb, #0891b2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin: 0 auto 16px;
}

/* Progress Bars */
.progress-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    margin: 16px 0 8px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: linear-gradient(135deg, #2563eb, #0891b2);
    border-radius: 4px;
    transition: width 0.8s ease;
}

.progress-text {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

/* Timeline */
.timeline {
    position: relative;
    margin-top: 48px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e5e7eb;
}

.timeline-item {
    position: relative;
    padding-left: 64px;
    margin-bottom: 48px;
}

.timeline-marker {
    position: absolute;
    left: 16px;
    top: 8px;
    width: 16px;
    height: 16px;
    background: #2563eb;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 2px #e5e7eb;
}

.timeline-date {
    font-weight: 600;
    color: #2563eb;
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.timeline-content h3 {
    margin-bottom: 8px;
}

.timeline-content ul {
    margin-top: 16px;
    padding-left: 24px;
}

.timeline-content li {
    margin-bottom: 8px;
    color: #6b7280;
}

/* Stats */
.collaboration-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.stat-item {
    text-align: center;
    padding: 32px 24px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1.125rem;
    color: #6b7280;
    font-weight: 500;
}

/* Contact Page */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    margin-top: 48px;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-info-section {
    background: #f8fafc;
    padding: 40px;
    border-radius: 12px;
}

.contact-details {
    margin-bottom: 32px;
}

.contact-item {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #e5e7eb;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item h3 {
    color: #2563eb;
    margin-bottom: 8px;
}

.contact-item a {
    color: #2563eb;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.location {
    margin-bottom: 24px;
    padding: 16px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.location h4 {
    color: #2563eb;
    margin-bottom: 8px;
}

/* Solutions Content */
.solutions-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 48px;
}

.solutions-text h2 {
    text-align: left;
}

.solutions-list {
    list-style: none;
    margin: 24px 0;
}

.solutions-list li {
    padding: 8px 0;
    position: relative;
    padding-left: 24px;
}

.solutions-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.solutions-image img,
.capabilities-image img,
.safety-image img,
.story-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

/* Platform Content */
.capabilities-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 48px;
}

.capabilities-text h3 {
    text-align: left;
    margin-bottom: 16px;
}

.capability-features {
    margin-top: 32px;
}

.feature-item {
    margin-bottom: 24px;
    padding: 16px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.feature-item h4 {
    color: #2563eb;
    margin-bottom: 8px;
}

.feature-item p {
    color: #6b7280;
    margin: 0;
}

/* Specifications */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.spec-category {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.spec-category h3 {
    color: #2563eb;
    margin-bottom: 16px;
}

.spec-category ul {
    list-style: none;
}

.spec-category li {
    padding: 8px 0;
    position: relative;
    padding-left: 24px;
    color: #6b7280;
}

.spec-category li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

/* Ethics Content */
.safety-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 48px;
}

.safety-text h3 {
    text-align: left;
    margin-bottom: 16px;
}

.safety-levels {
    margin-top: 32px;
}

.safety-level {
    margin-bottom: 24px;
    padding: 16px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #10b981;
}

.safety-level h4 {
    color: #10b981;
    margin-bottom: 8px;
}

.safety-level p {
    color: #6b7280;
    margin: 0;
}

/* Board Members */
.ethics-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.board-member {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.board-member h4 {
    color: #2563eb;
    margin-bottom: 8px;
}

.board-member p {
    color: #6b7280;
    margin: 0;
    font-size: 0.875rem;
}

/* Transparency */
.transparency-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.transparency-item {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.transparency-item h3 {
    color: #2563eb;
    margin-bottom: 16px;
}

/* About Page */
.mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 48px;
}

.mission-card,
.vision-card {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.mission-card h2,
.vision-card h2 {
    color: #2563eb;
    margin-bottom: 16px;
}

.story-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 48px;
}

.story-text h3 {
    text-align: left;
    margin-bottom: 24px;
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.team-member {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

.team-member:hover {
    transform: translateY(-8px);
}

.member-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 16px;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-title {
    color: #2563eb;
    font-weight: 600;
    margin-bottom: 8px;
}

.member-bio {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0;
}

/* Achievements Timeline */
.achievements-timeline {
    margin-top: 48px;
    position: relative;
}

.achievements-timeline::before {
    content: '';
    position: absolute;
    left: 48px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e5e7eb;
}

.achievement-item {
    position: relative;
    padding-left: 120px;
    margin-bottom: 48px;
}

.achievement-year {
    position: absolute;
    left: 0;
    top: 0;
    width: 80px;
    height: 40px;
    background: #2563eb;
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.achievement-item h3 {
    margin-bottom: 8px;
    color: #2563eb;
}

/* Innovation Timeline */
.innovation-timeline {
    margin-top: 16px;
    padding: 8px 12px;
    background: #e0f2fe;
    color: #0891b2;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Partnership Success Stories */
.success-stories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.story-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-left: 4px solid #10b981;
}

.story-stats {
    display: flex;
    gap: 16px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.story-stats span {
    background: #ecfdf5;
    color: #065f46;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Partnership Process */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.step {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-8px);
}

.step .step-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563eb, #0891b2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin: 0 auto 16px;
}

/* Partners Grid */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.partner-category {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.partner-category h3 {
    color: #2563eb;
    margin-bottom: 16px;
}

.partner-list {
    list-style: none;
}

.partner-list li {
    padding: 8px 0;
    color: #6b7280;
    position: relative;
    padding-left: 24px;
}

.partner-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

/* Response Info */
.response-info {
    text-align: center;
    margin-top: 48px;
}

.response-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.response-item {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.response-item h3 {
    color: #2563eb;
    margin-bottom: 8px;
}

.response-item p {
    color: #6b7280;
    margin: 0;
    font-size: 0.875rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #1e40af 0%, #0891b2 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    background: none;
    -webkit-text-fill-color: white;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-section h4 {
    color: #2563eb;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid #374151;
    font-size: 0.875rem;
    color: #9ca3af;
}

/* Form Validation Styles */
.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 4px;
    display: none;
}

.error-message.show {
    display: block;
}

/* Success Message */
.success-message {
    background: #10b981;
    color: white;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    display: none;
}

.success-message.show {
    display: block;
    animation: slideIn 0.5s ease;
}

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

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        gap: 16px;
        border-top: 1px solid #e5e7eb;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hamburger {
        display: flex;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: #f8fafc;
        margin-top: 8px;
        border-radius: 4px;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 32px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .contact-content,
    .solutions-content,
    .capabilities-content,
    .safety-content,
    .story-content,
    .mission-vision {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }

    .timeline::before {
        left: 16px;
    }

    .timeline-item {
        padding-left: 48px;
    }

    .timeline-marker {
        left: 8px;
    }

    .achievements-timeline::before {
        left: 40px;
    }

    .achievement-item {
        padding-left: 100px;
    }

    .achievement-year {
        left: 0;
        width: 70px;
        height: 35px;
        font-size: 0.875rem;
    }

    .container {
        padding: 0 16px;
    }

    .section {
        padding: 48px 0;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }

    .pitch-grid,
    .highlights-grid,
    .platform-grid,
    .solutions-grid,
    .research-grid,
    .ethics-grid,
    .partnership-types,
    .benefits-grid,
    .values-grid,
    .innovation-grid,
    .compliance-grid {
        grid-template-columns: 1fr;
    }

    .process-flow,
    .process-steps,
    .collaboration-stats,
    .response-grid {
        grid-template-columns: 1fr;
    }

    .tab-buttons {
        gap: 4px;
    }

    .tab-btn {
        padding: 8px 16px;
        font-size: 0.875rem;
    }
}

/* Additional utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }

.p-8 { padding: 8px; }
.p-16 { padding: 16px; }
.p-24 { padding: 24px; }
.p-32 { padding: 32px; }

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

.animate-on-scroll {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth hover transitions for all interactive elements */
a, button, .card, .btn {
    transition: all 0.3s ease;
}

/* Focus styles for accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}