/* ==========================================
   HelpersCenter Inc. - Stylesheet
   Professional Green Design
   ========================================== */

/* ==========================================
   CSS Variables & Reset
   ========================================== */
:root {
    --primary-color: #00a651;
    --primary-dark: #008542;
    --primary-light: #00bf63;
    --secondary-color: #00d66a;
    --accent-color: #ffd700;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-light: #6a6a6a;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --error-color: #dc3545;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ==========================================
   Container & Layout
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================
   Header
   ========================================== */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 3px;
}

.nav ul {
    display: flex;
    gap: 2rem;
}

.nav a {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav a:hover::after,
.nav a:focus::after {
    width: 100%;
}

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

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: var(--bg-white);
    padding: 5rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: #ffed4e;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-submit {
    width: 100%;
    border: none;
    cursor: pointer;
}

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

/* ==========================================
   Section Styles
   ========================================== */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================
   Services Section
   ========================================== */
.services {
    background-color: var(--bg-light);
}

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

.service-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--bg-white);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.service-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    margin-top: 0.5rem;
}

.service-link:hover {
    color: var(--primary-light);
    transform: translateX(5px);
}

.service-card {
    cursor: pointer;
}

/* ==========================================
   Modal Styles
   ========================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-white);
    margin: 2rem auto;
    padding: 0;
    border-radius: 12px;
    max-width: 800px;
    width: 90%;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: slideUp 0.4s ease;
}

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

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background-color: var(--bg-gray);
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-content h2 {
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    padding: 2rem 2rem 1rem 2rem;
    border-bottom: 3px solid var(--primary-color);
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: calc(85vh - 120px);
}

.modal-body h3 {
    color: var(--primary-color);
    font-size: 1.375rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--bg-gray);
}

.modal-body h3:first-child {
    margin-top: 0;
}

.modal-body p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.modal-body ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.modal-body ul li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.modal-body ul li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
}

.modal-body strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ==========================================
   Methodology Section - Timeline
   ========================================== */
.methodology {
    background-color: var(--bg-white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-white);
    box-shadow: var(--shadow-md);
    border: 4px solid var(--bg-white);
}

.timeline-content {
    background-color: var(--bg-light);
    padding: 1.75rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.timeline-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    flex-shrink: 0;
}

.info-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.info-item p {
    color: var(--text-secondary);
    margin: 0.25rem 0;
}

.info-item a {
    color: var(--primary-color);
    font-weight: 500;
}

.info-item a:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

.info-detail {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ==========================================
   Contact Form
   ========================================== */
.contact-form {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 61, 130, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

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

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--error-color);
}

.form-message {
    grid-column: 1 / -1;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    display: none;
}

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

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--primary-dark);
    color: var(--bg-white);
    padding: 2.5rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-logo img {
    height: 50px;
    margin-bottom: 0.5rem;
    filter: brightness(0) invert(1);
}

.footer-logo p {
    font-weight: 600;
    font-size: 1.125rem;
}

.footer-text p {
    opacity: 0.9;
    margin: 0.25rem 0;
}

.footer-text p:first-child {
    font-size: 0.95rem;
}

.footer-text p:last-child {
    font-size: 0.9rem;
    font-style: italic;
}

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

/* Tablets */
@media (max-width: 968px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 70px;
    }

    .timeline-marker {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* Mobile Devices */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    section {
        padding: 3rem 0;
    }

    .header-content {
        padding: 0.75rem 0;
    }

    .logo img {
        height: 40px;
    }

    .menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--bg-white);
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
        padding: 5rem 2rem 2rem;
        overflow-y: auto;
    }

    .nav.active {
        right: 0;
    }

    .nav ul {
        flex-direction: column;
        gap: 0;
    }

    .nav a {
        display: block;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
        font-size: 1.1rem;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-marker {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .timeline-content h3 {
        font-size: 1.125rem;
    }

    .contact-form {
        padding: 1.5rem;
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    /* Modal responsive */
    .modal-content {
        width: 95%;
        margin: 1rem auto;
        max-height: 90vh;
    }

    .modal-content h2 {
        font-size: 1.5rem;
        padding: 1.5rem 1.5rem 1rem 1.5rem;
    }

    .modal-body {
        padding: 1.5rem;
        max-height: calc(90vh - 100px);
    }

    .modal-close {
        right: 10px;
        top: 10px;
        width: 35px;
        height: 35px;
        font-size: 1.75rem;
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .service-card,
    .timeline-content,
    .info-item {
        padding: 1.25rem;
    }

    .contact-form {
        padding: 1.25rem;
    }
}

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

.service-card,
.timeline-item,
.info-item {
    animation: fadeIn 0.6s ease-out;
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    .header,
    .menu-toggle,
    .nav,
    .btn,
    .contact-form,
    .footer {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }

    section {
        page-break-inside: avoid;
    }
}