/* ============================================
   Reusable Components
   ============================================ */


/* ===========================
   BUTTONS
   =========================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    line-height: 1.4;
}

.btn--primary {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(67, 56, 202, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 56, 202, 0.4);
    color: #fff;
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.btn--sm {
    padding: 0.5rem 1.25rem;
    font-size: var(--text-xs);
}

.btn--lg {
    padding: 0.9rem 2.2rem;
    font-size: var(--text-base);
}


/* ===========================
   GLASS CARD
   =========================== */

.glass-card {
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-xl);
    height: 100%;
    transition:
        transform var(--transition-base),
        box-shadow var(--transition-base),
        border-color var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(67, 56, 202, 0.2);
}

.glass-card--accent {
    border-top: 3px solid var(--card-accent, var(--color-primary));
}


/* ===========================
   TAGS
   =========================== */

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.85rem;
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background: rgba(67, 56, 202, 0.08);
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(67, 56, 202, 0.15);
}

.tag--secondary {
    background: rgba(13, 148, 136, 0.08);
    color: var(--color-secondary);
}

.tag--secondary:hover {
    background: rgba(13, 148, 136, 0.15);
}

.tag--accent {
    background: rgba(124, 58, 237, 0.08);
    color: var(--color-accent);
}

.tag--accent:hover {
    background: rgba(124, 58, 237, 0.15);
}


/* ===========================
   METRICS (hero)
   =========================== */

.metric {
    text-align: center;
    padding: 0 var(--space-xl);
}

.metric__value {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline;
}

.metric__suffix {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric__label {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
    font-weight: 500;
}

.metric__divider {
    width: 1px;
    background: rgba(0, 0, 0, 0.08);
    align-self: stretch;
}


/* ===========================
   ERA CARDS
   =========================== */

.era {
    position: relative;
    overflow: hidden;
    border-left: 4px solid var(--era-color, var(--color-primary));
}

.era__number {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 800;
    color: var(--era-color, var(--color-primary));
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--space-xs);
}

.era__period {
    font-size: var(--text-xs);
    color: var(--color-text-light);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.era__title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 800;
    margin-bottom: var(--space-xs);
    color: var(--era-color, var(--color-primary));
}

.era__role {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.era__desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.era__badge {
    font-size: var(--text-xs);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.era__badge i {
    color: var(--era-color, var(--color-primary));
}

.era__impact {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.era__impact span {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.era__impact strong {
    color: var(--era-color, var(--color-primary));
    font-size: var(--text-lg);
}

.era--current {
    border-color: var(--color-primary);
    background: rgba(67, 56, 202, 0.04);
}

.era--current::after {
    content: 'CURRENT';
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #fff;
    background: var(--gradient-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}


/* ===========================
   IMPACT CARDS (dark section)
   =========================== */

.impact-card {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}

.impact-card__icon {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
}

.impact-card__value {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 900;
    color: #fff;
    display: inline;
}

.impact-card__unit {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-secondary);
    display: inline;
}

.impact-card__label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-sm);
    line-height: 1.5;
}


/* ===========================
   DOMAIN CARDS (expertise)
   =========================== */

.domain {
    display: flex;
    flex-direction: column;
}

.domain__icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: var(--space-lg);
    flex-shrink: 0;
}

.domain__title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.domain__desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    flex: 1;
}

.domain__tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.domain__tools span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
}


/* ===========================
   WORK CARDS
   =========================== */

.work-card {
    display: flex;
    flex-direction: column;
}

.work-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.work-card__company {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
}

.work-card__year {
    font-size: var(--text-xs);
    color: var(--color-text-light);
}

.work-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.work-card__desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    flex: 1;
    line-height: 1.7;
}

.work-card__metrics {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-md);
}

.work-card__metrics span {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.work-card__metrics strong {
    color: var(--color-primary);
    font-size: var(--text-lg);
}

.work-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}


/* ===========================
   PUBLICATION CARDS
   =========================== */

.publication-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    border-left: 3px solid var(--color-primary);
    padding: var(--space-lg) var(--space-xl);
    transition: transform var(--transition-base);
}

.publication-card:hover {
    transform: translateX(4px);
}

.publication-card__year {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    white-space: nowrap;
}

.publication-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-base);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.publication-card__venue {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.publication-card__link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.publication-card__link:hover {
    color: var(--color-primary-dark);
}


/* ===========================
   CREDENTIAL CARDS
   =========================== */

.credential-card {
    padding: var(--space-lg);
    transition: transform var(--transition-base);
}

.credential-card:hover {
    transform: translateY(-3px);
}

.credential-card__badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.credential-card__badge.udacity {
    background: rgba(13, 148, 136, 0.1);
    color: var(--color-secondary);
}

.credential-card__badge.coursera {
    background: rgba(67, 56, 202, 0.1);
    color: var(--color-primary);
}

.credential-card__badge.sun {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
}

.credential-card__year {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.credential-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-base);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.credential-card__org {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.credential-card__detail {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.6;
}


/* ===========================
   CONTACT LINKS
   =========================== */

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

.contact-link:hover {
    transform: translateX(6px);
    color: inherit;
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.contact-link i {
    font-size: 1.25rem;
    color: var(--color-primary);
    width: 28px;
    text-align: center;
    flex-shrink: 0;
}

.contact-link strong {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text);
}

.contact-link span {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}


/* ===========================
   BLOG CARDS
   =========================== */

.blog-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.blog-card:hover {
    color: inherit;
}

.blog-card__meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--color-text-light);
}

.blog-card__category {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-card__title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.blog-card:hover .blog-card__title {
    color: var(--color-primary);
}

.blog-card__excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    flex: 1;
    margin-bottom: var(--space-md);
}

.blog-card__link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.blog-card__link i {
    transition: transform var(--transition-fast);
}

.blog-card:hover .blog-card__link i {
    transform: translateX(4px);
}


/* ===========================
   FILTER PILLS
   =========================== */

.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.filter-pill {
    padding: 0.4rem 1.1rem;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 600;
    background: var(--color-surface);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-muted);
}

.filter-pill:hover {
    color: var(--color-primary);
    border-color: var(--color-primary-light);
}

.filter-pill--active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}


/* ===========================
   FORM ELEMENTS
   =========================== */

.form__group {
    margin-bottom: var(--space-md);
}

.form__label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 0.75rem var(--space-md);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form__input:focus,
.form__textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
}

.form__textarea {
    min-height: 140px;
    resize: vertical;
}