/**
 * Brain Developer - Front-End Page Styles
 * ========================================
 * Estilos específicos para a página Front-End (Front-End.html).
 * 
 * Depende de: tokens.css, base.css, layout.css, components.css
 */

/* ==========================================
   FRONTEND - HERO SECTION
   ========================================== */

.frontend-hero {
    background: var(--gradient-frontend);
    padding: var(--spacing-16) var(--spacing-4);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.frontend-hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.12), transparent 70%);
    pointer-events: none;
}

.frontend-hero::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(147, 51, 234, 0.1), transparent 70%);
    pointer-events: none;
}

.frontend-hero__title {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-4);
    position: relative;
    z-index: 1;
    line-height: var(--line-height-tight);
}

.frontend-hero__title span {
    background: linear-gradient(135deg, #67e8f9, #c4b5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.frontend-hero__subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    line-height: var(--line-height-relaxed);
}

/* ==========================================
   FRONTEND - TECH STACK SECTION
   ========================================== */

.frontend-stack {
    padding: var(--spacing-16) var(--spacing-4);
    background: var(--color-surface-secondary);
}

.frontend-stack__intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-10);
}

.frontend-stack__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-5);
    max-width: 1100px;
    margin: 0 auto;
}

.frontend-tech-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-5);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.frontend-tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--tech-color, var(--color-accent-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-smooth);
}

.frontend-tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.frontend-tech-card:hover::before {
    transform: scaleX(1);
}

/* Tech card color variants */
.frontend-tech-card--html {
    --tech-color: #e34f26;
}
.frontend-tech-card--css {
    --tech-color: #1572b6;
}
.frontend-tech-card--js {
    --tech-color: #f7df1e;
}
.frontend-tech-card--react {
    --tech-color: #61dafb;
}
.frontend-tech-card--vue {
    --tech-color: #4fc08d;
}
.frontend-tech-card--angular {
    --tech-color: #dd0031;
}

.frontend-tech-card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.frontend-tech-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    background: var(--color-accent-50);
    color: var(--color-accent-600);
}

.frontend-tech-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.frontend-tech-card__badge {
    background: var(--color-accent-50);
    color: var(--color-accent-700);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.frontend-tech-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
}

.frontend-tech-card__topics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.frontend-tech-card__topic {
    background: var(--color-surface-tertiary);
    color: var(--color-text-secondary);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
}

/* ==========================================
   FRONTEND - SKILLS SECTION
   ========================================== */

.frontend-skills {
    padding: var(--spacing-16) var(--spacing-4);
}

.frontend-skills__categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-5);
    max-width: 1100px;
    margin: 0 auto;
}

.frontend-skill-category {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-5);
}

.frontend-skill-category__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 1px solid var(--color-border-subtle);
}

.frontend-skill-category__icon {
    font-size: var(--font-size-xl);
    color: var(--color-accent-500);
}

.frontend-skill-category__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.frontend-skill-category__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.frontend-skill-category__item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-2) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

.frontend-skill-category__item:last-child {
    border-bottom: none;
}

.frontend-skill-category__name {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.frontend-skill-category__level {
    font-size: var(--font-size-xs);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
}

.frontend-skill-category__level--essential {
    background: var(--color-success-50);
    color: var(--color-success-700);
}

.frontend-skill-category__level--important {
    background: var(--color-accent-50);
    color: var(--color-accent-700);
}

.frontend-skill-category__level--bonus {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
}

/* ==========================================
   FRONTEND - LEARNING PATH
   ========================================== */

.frontend-path {
    padding: var(--spacing-16) var(--spacing-4);
    background: var(--gradient-section-blue);
}

.frontend-path__timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.frontend-path__timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent-400), var(--color-primary-400));
    transform: translateX(-50%);
}

.frontend-path__step {
    display: flex;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
    position: relative;
}

.frontend-path__step:nth-child(even) {
    flex-direction: row-reverse;
}

.frontend-path__step:nth-child(even) .frontend-path__content {
    text-align: right;
}

.frontend-path__marker {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 52px;
    height: 52px;
    background: var(--color-bg-primary);
    border: 3px solid var(--color-accent-500);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
    z-index: 1;
}

.frontend-path__content {
    flex: 1;
    max-width: calc(50% - 50px);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-5);
}

.frontend-path__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.frontend-path__description {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
    line-height: var(--line-height-relaxed);
}

.frontend-path__duration {
    display: inline-block;
    background: rgba(14, 165, 233, 0.2);
    color: var(--color-accent-400);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    margin-top: var(--spacing-3);
}

/* ==========================================
   FRONTEND - FRAMEWORKS SECTION
   ========================================== */

.frontend-frameworks {
    padding: var(--spacing-16) var(--spacing-6);
}

.frontend-frameworks__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
    max-width: 1200px;
    margin: 0 auto;
}

.frontend-framework-card {
    background: var(--color-surface-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all var(--transition-normal);
}

.frontend-framework-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.frontend-framework-card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.frontend-framework-card__logo {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
}

.frontend-framework-card__logo--react {
    background: rgba(97, 218, 251, 0.15);
}
.frontend-framework-card__logo--vue {
    background: rgba(79, 192, 141, 0.15);
}
.frontend-framework-card__logo--angular {
    background: rgba(221, 0, 49, 0.15);
}

.frontend-framework-card__info h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.frontend-framework-card__info span {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.frontend-framework-card__description {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
}

.frontend-framework-card__stats {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.frontend-framework-card__stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
}

.frontend-framework-card__stat-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-400);
}

.frontend-framework-card__stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* ==========================================
   FRONTEND - SALARY SECTION
   ========================================== */

.frontend-salary {
    padding: var(--spacing-16) var(--spacing-6);
    background: var(--color-surface-secondary);
}

.frontend-salary__cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-6);
    max-width: 1000px;
    margin: 0 auto;
}

.frontend-salary-card {
    background: var(--color-surface-primary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: all var(--transition-normal);
}

.frontend-salary-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.frontend-salary-card__level {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.frontend-salary-card__experience {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-4);
}

.frontend-salary-card__value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-success-400);
}

.frontend-salary-card__period {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ==========================================
   FRONTEND - PROJECTS SECTION
   ========================================== */

.frontend-projects {
    padding: var(--spacing-16) var(--spacing-6);
}

.frontend-projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
    max-width: 1200px;
    margin: 0 auto;
}

.frontend-project-card {
    background: var(--color-surface-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all var(--transition-normal);
}

.frontend-project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.frontend-project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-4);
}

.frontend-project-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.frontend-project-card__difficulty {
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.frontend-project-card__difficulty--easy {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success-400);
}

.frontend-project-card__difficulty--medium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning-400);
}

.frontend-project-card__difficulty--hard {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-error-400);
}

.frontend-project-card__description {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
}

.frontend-project-card__skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.frontend-project-card__skill {
    background: rgba(14, 165, 233, 0.1);
    color: var(--color-accent-400);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
}

/* ==========================================
   FRONTEND - CTA & NEXT STEPS
   ========================================== */

.frontend-cta-card {
    background: linear-gradient(135deg, #e0f2fe 0%, #b3e5fc 100%);
    border-radius: var(--radius-3xl);
    padding: var(--spacing-12);
    margin-top: var(--spacing-12);
    text-align: center;
    border-left: 6px solid var(--color-accent-400);
    box-shadow: var(--shadow-lg);
}

.frontend-cta-title {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.frontend-cta-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    max-width: 800px;
    margin: 0 auto;
}

.frontend-next-steps__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
    margin-top: var(--spacing-8);
}

.frontend-next-step-card {
    background: var(--color-surface-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary-400);
}

.frontend-next-step-card--primary {
    border-left-color: var(--color-primary-400);
}
.frontend-next-step-card--success {
    border-left-color: var(--color-success-400);
}
.frontend-next-step-card--warning {
    border-left-color: var(--color-warning-400);
}

.frontend-next-step-title {
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.frontend-next-step-title--primary {
    color: var(--color-primary-500);
}
.frontend-next-step-title--success {
    color: var(--color-success-500);
}
.frontend-next-step-title--warning {
    color: var(--color-warning-500);
}

.frontend-next-step-list {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    padding-left: var(--spacing-5);
}

.frontend-framework-card__list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-4);
    color: var(--color-text-secondary);
}

.frontend-framework-card__list li {
    padding: var(--spacing-2) 0;
}

/* ==========================================
   RESPONSIVIDADE
   ========================================== */

@media (max-width: 768px) {
    .frontend-hero {
        padding: var(--spacing-12) var(--spacing-4);
    }

    .frontend-path__timeline::before {
        left: 24px;
    }

    .frontend-path__step,
    .frontend-path__step:nth-child(even) {
        flex-direction: column;
        padding-left: 70px;
    }

    .frontend-path__step:nth-child(even) .frontend-path__content {
        text-align: left;
    }

    .frontend-path__marker {
        left: 0;
        transform: none;
        width: 48px;
        height: 48px;
    }

    .frontend-path__content {
        max-width: 100%;
    }
}