/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-bg-dark) 100%);
    color: white;
    padding: 8rem var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(96, 165, 250, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    justify-content: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.hero-text {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.hero-image {
    flex: 0 1 300px;
}

.hero-image img {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    border: 3px solid var(--color-primary);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -1px;
}

.hero .title {
    font-size: 1.5rem;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
}

.hero p {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* CTA Buttons */
.cta-buttons {
    display: grid;
    gap: var(--spacing-md);
    max-width: 720px;
    margin: 0 auto;
}

.cta-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-md);
}

.cta-group-wide {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-md);
}

.cta-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) 1.4rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-normal);
    font-size: var(--font-size-base);
    text-align: center;
    min-height: 100px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
    -webkit-tap-highlight-color: rgba(96, 165, 250, 0.3);
    touch-action: manipulation;
    cursor: pointer;
}

.cta-primary {
    background: rgba(15, 23, 42, 0.6);
    color: white;
    border: 2px solid var(--color-primary);
}

.cta-primary:hover {
    background: var(--color-primary);
    color: #0b1120;
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(96, 165, 250, 0.35);
}

.cta-secondary {
    background: rgba(15, 23, 42, 0.6);
    color: white;
    border: 2px solid var(--color-primary);
}

.cta-secondary:hover {
    background: var(--color-primary);
    color: #0b1120;
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(96, 165, 250, 0.35);
}

.cta-wide {
    padding: 1.2rem var(--spacing-xl);
    min-height: 110px;
}

/* About Section */
#about {
    background: var(--color-bg-card-alt);
}

.about-content {
    background: var(--color-bg-card);
    padding: 3rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    max-width: 900px;
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

.about-content p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.9;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

.experience-highlight {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.highlight-card {
    background: var(--color-bg-input);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    text-align: center;
}

.highlight-number {
    font-size: 2.5rem;
    color: var(--color-primary);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-sm);
}

.highlight-text {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Skills Section */
#skills {
    background: var(--color-bg-card);
}

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

.skill-category {
    background: var(--color-bg-card-alt);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border-top: 3px solid var(--color-primary);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-5px);
}

.skill-category h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xlarge);
}

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

.skill-list li {
    color: var(--color-text-secondary);
    margin-bottom: 0.8rem;
    padding-left: var(--spacing-lg);
    position: relative;
}

.skill-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Certifications Section */
#certifications {
    background: var(--color-bg-card-alt);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-xl);
}

.cert-badge {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: all var(--transition-normal);
}

.cert-badge:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
}

.cert-badge h3 {
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.cert-badge p {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

/* Schedule Section */
#schedule {
    background: var(--color-bg-card);
}

.schedule-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, var(--color-bg-card-alt) 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
}

.schedule-content h3 {
    color: var(--color-primary-light);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.schedule-content > p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.schedule-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    display: grid;
    gap: var(--spacing-md);
}

.schedule-features li {
    color: var(--color-text-secondary);
    padding-left: var(--spacing-xl);
    position: relative;
    font-size: 1rem;
}

.schedule-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    font-size: 1.2rem;
    color: var(--color-primary-light);
    font-weight: bold;
}

.schedule-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    background: var(--color-primary);
    color: #0b1120;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-large);
    transition: all var(--transition-normal);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
    margin: 0 auto;
    display: block;
    text-align: center;
    max-width: 300px;
    -webkit-tap-highlight-color: rgba(59, 130, 246, 0.3);
    touch-action: manipulation;
    cursor: pointer;
}

.schedule-button:hover {
    background: var(--color-primary-light);
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.4);
}

.schedule-note {
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    font-style: italic;
    text-align: center;
    margin-bottom: 0;
}

/* Contact Section */
#contact {
    background: var(--color-bg-card);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: 3rem;
}

.contact-item {
    background: var(--color-bg-card-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
}

.contact-item h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

.contact-item p {
    color: var(--color-text-secondary);
    white-space: nowrap;
    font-size: 0.95rem;
}

.contact-item a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.contact-item a:hover {
    color: var(--color-primary);
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .hero-content {
        text-align: center;
        flex-direction: column;
    }

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

@media (max-width: 768px) {
    .hero {
        padding: 5rem var(--spacing-md);
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero .title {
        font-size: 1.2rem;
    }

    .hero-image img {
        max-width: 240px;
    }

    .cta-group {
        grid-template-columns: 1fr;
    }

    .cta-group-wide {
        grid-template-columns: 1fr;
    }

    .cta-button {
        min-height: 56px;
        padding: 0.8rem var(--spacing-md);
    }

    .cta-buttons {
        gap: 0.8rem;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    /* Placeholder anchor where the existing hero CTA will be moved into on small screens */
    #mobile-cta-anchor { display: block; max-width: 720px; margin: 0.5rem auto 1rem auto; position: sticky; top: 0.35rem; z-index: 30; padding-top: 0.5rem; }
    /* hide placeholder if it has no children (removes empty gap) */
    #mobile-cta-anchor:empty { display: none !important; }
    /* Styling applied when that CTA is moved here to emphasize like the hero CTA */
    #mobile-cta-anchor .cta-button { display: flex; align-items: center; justify-content: center; font-size: 1.05rem; padding: 1rem; min-height: 64px; }
    /* When the CTA is moved into the top anchor change appearance to match hero-wide cta.
       Keep font properties consistent with .cta-button so it matches surrounding buttons.
    */
    .mobile-moved-cta {
        padding: 1.15rem 1.4rem;
        min-height: 72px;
        border-radius: var(--radius-xl);
        font-size: var(--font-size-base);
        font-weight: var(--font-weight-semibold);
        font-family: inherit;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4.25rem 0.75rem;
    }

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

/* Hide the mobile-only CTA for medium+ screens */
@media (min-width: 769px) {
    #mobile-cta-anchor { display: none; }
}

@media (max-width: 768px) and (min-width: 481px) {
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .cert-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}