/* ===== ROOT VARIABLES ===== */
:root {
    --primary-color: #ff7a00;
    --secondary-color: #001f3f;
    --accent-color: #ffa94d;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 100%; max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.bg-light {
    background: var(--bg-light);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #001f3f 100%);
    color: var(--white);
    padding: 120px 5% 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 100%; max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.6;
    color: var(--white);
}

/* ===== INTERNSHIP SECTION ===== */
.internship-section {
    padding: 80px 5%;
}

/* ===== BENEFITS SECTION ===== */
.benefits-section {
    text-align: center;
    margin-bottom: 4rem;
}

.benefits-section h2 {
    margin-bottom: 3rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 100%; max-width: 1200px;
    margin: 0 auto;
}

.benefit-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.benefit-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.benefit-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.benefit-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.benefit-card p {
    color: var(--text-light);
    margin: 0;
    line-height: 1.5;
}

/* ===== INTERNSHIPS LIST ===== */
.internships-list h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.internship-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    max-width: 100%; max-width: 1200px;
    margin: 0 auto;
}

.internship-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    transition: var(--transition);
    border: 2px solid transparent;
}

.internship-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.internship-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.internship-header h3 {
    color: var(--secondary-color);
    margin: 0;
    flex: 1;
    font-weight: 600;
}

.internship-mode {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.internship-mode.remote {
    background: #e3f2fd;
    color: #1976d2;
}

.internship-mode.on-premises {
    background: #e8f5e8;
    color: #2e7d32;
}

.internship-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.detail-item i {
    color: var(--primary-color);
    width: 16px;
}

.internship-description {
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.internship-requirements {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.internship-requirements h4 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.internship-requirements p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== BUTTON STYLES ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Poppins', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border: 2px solid transparent;
    font-weight: 600;
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 122, 0, 0.3);
}

.apply-btn {
    width: 100%;
}

/* ===== NO INTERNSHIPS STATE ===== */
.no-internships {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.no-internships i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.no-internships h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.no-internships p {
    color: var(--text-light);
    margin: 0;
}

/* ===== MODAL STYLES ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--white);
    margin: 5% auto;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 100%; max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: modalFadeIn 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e0e0e0;
}

.modal-header h2 {
    margin: 0;
    color: var(--secondary-color);
    font-weight: 600;
}

.close-modal {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
    background: none;
    border: none;
}

.close-modal:hover {
    color: var(--secondary-color);
}

.modal-body {
    padding: 2rem;
}

/* ===== APPLICATION FORM ===== */
.application-form {
    margin-top: 1rem;
}

.application-form .form-row {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
    font-family: 'Poppins', sans-serif;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.1);
}

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

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--text-dark);
}

.form-checkbox input {
    width: auto;
    margin: 0;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 5% 60px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .internship-section {
        padding: 60px 5%;
    }
    
    .internship-cards {
        grid-template-columns: 1fr;
    }
    
    .internship-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .internship-card {
        padding: 1.5rem;
    }
    
    .internship-details {
        grid-template-columns: 1fr;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
}

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

.hero-content,
.benefit-card,
.internship-card {
    animation: fadeInUp 0.6s ease-out;
}

.benefit-card:nth-child(1) { animation-delay: 0.1s; }
.benefit-card:nth-child(2) { animation-delay: 0.2s; }
.benefit-card:nth-child(3) { animation-delay: 0.3s; }
.benefit-card:nth-child(4) { animation-delay: 0.4s; }

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    .benefit-card,
    .internship-card,
    .modal-content,
    .btn {
        animation: none;
        transition: none;
    }
}