:root {
    --azul: #0b3d91;
    --cyan: #2dd4bf;
    --fondo: #f4fbff;
    --texto: #102a43;
    --gris: #9ca3af;
    --page-bg: linear-gradient(180deg, #eef7ff 0%, #f8feff 100%);
    --surface-bg: white;
    --surface-border: rgba(13, 74, 134, 0.12);
    --surface-shadow: 0 10px 30px rgba(15, 43, 83, 0.08);
    --modal-text: #102a43;
    --footer-bg: #0f1f3a;
    --footer-text: #d9e8ff;
}

html, body {
    min-height: 100%;
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    font-family: Inter, system-ui, sans-serif;
    background: var(--page-bg);
    color: var(--texto);
    min-height: 100vh;
}

main {
    flex: 1;
}

body.dark-mode {
    --azul: #205cf3;
    --cyan: #7dd3fc;
    --fondo: #0b1220;
    --texto: #e2e8f0;
    --gris: #94a3b8;    --modal-text: #e2e8f0;    --page-bg: linear-gradient(180deg, #020617 0%, #06172d 100%);
    --surface-bg: #0f172a;
    --surface-border: rgba(148, 163, 184, 0.16);
    --surface-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --footer-bg: #020617;
    --footer-text: #cbd5e1;
}

header {
    background: var(--azul);
    color: white;
    padding: 1.5rem 1rem;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

header p {
    color: rgba(255,255,255,0.85);
}

.header-top {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "title text button";
    align-items: center;
    gap: 1rem;
}

.header-top h1 {
    grid-area: title;
    min-width: 0;
    margin: 0;
}

.header-top p {
    grid-area: text;
    margin: 0;
    overflow-wrap: anywhere;
}

.theme-toggle {
    grid-area: button;
}

@media (max-width: 760px) {
    .header-top {
        grid-template-columns: auto auto;
        grid-template-rows: auto auto;
        grid-template-areas:
            "title button"
            "text text";
        align-items: start;
    }

    .theme-toggle {
        justify-self: end;
    }
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: inherit;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.16);
}

.hero {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.cards {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin: 2rem 0;
}

.card {
    background: var(--surface-bg);
    border: 1px solid var(--surface-border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: var(--surface-shadow);
}

.card h2 {
    color: var(--azul);
    margin-bottom: 0.8rem;
}

.card p {
    color: var(--gris);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--cyan);
    color: #04303a;
    border: none;
    border-radius: 999px;
    padding: 0.8rem 1.2rem;
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(45, 212, 191, 0.25);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}

.list-page {
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 1rem 4rem;
}

.list-intro {
    margin-bottom: 2rem;
}

.list-intro h2 {
    font-size: clamp(2rem, 3vw, 2.5rem);
    margin-bottom: 0.75rem;
}

.list-grid {
    display: grid;
    gap: 1rem;
}

.linktree-grid {
    display: grid;
    gap: 1rem;
}

.link-card {
    display: block;
    background: var(--surface-bg);
    border: 1px solid var(--surface-border);
    border-radius: 24px;
    padding: 1.4rem 1.5rem;
    box-shadow: var(--surface-shadow);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
    transform: translateY(-2px);
    border-color: var(--cyan);
    box-shadow: 0 18px 40px rgba(45, 212, 191, 0.15);
}

.link-card strong {
    display: block;
    margin-bottom: 0.45rem;
    font-size: 1.15rem;
}

.link-card span {
    color: var(--gris);
    line-height: 1.6;
}

.list-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    background: var(--surface-bg);
    border: 1px solid var(--surface-border);
    border-radius: 24px;
    padding: 1.5rem;
    box-shadow: var(--surface-shadow);
    align-items: center;
}

.list-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: rgba(45, 212, 191, 0.16);
    color: var(--azul);
    font-weight: 700;
}

.list-item h3 {
    margin-bottom: 0.5rem;
}

.list-item p {
    color: var(--gris);
    margin: 0;
}

@media (max-width: 768px) {
    .list-item {
        grid-template-columns: 1fr;
    }
}

.intro {
    display: grid;
    gap: 1rem;
    align-items: center;
    grid-template-columns: 1.5fr 1fr;
}

.intro img {
    width: 100%;
    border-radius: 24px;
    border: 4px solid rgba(45,212,191,0.18);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 24, 57, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--surface-bg);
    border-radius: 24px;
    width: 100%;
    max-width: 520px;
    padding: 1.5rem;
    box-shadow: var(--surface-shadow);
    position: relative;
}

.modal h3 {
    margin-bottom: 0.75rem;
    color: var(--azul);
}

.modal p {
    color: var(--modal-text);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.experience-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 1.25rem;
    display: grid;
    gap: 0.85rem;
}

.experience-list li {
    background: rgba(45, 212, 191, 0.08);
    border: 1px solid rgba(45, 212, 191, 0.16);
    border-radius: 18px;
    padding: 1rem 1.15rem;
}

.experience-list li strong {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--azul);
}

.experience-list li span {
    color: var(--modal-text);
    display: block;
    line-height: 1.6;
}

.modal .close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--azul);
    font-size: 1.25rem;
    cursor: pointer;
}

footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 1.5rem 1rem;
    text-align: center;
    margin-top: 3rem;
}

.footer-links {
    margin-top: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(217, 232, 255, 0.85);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--cyan);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .intro {
        grid-template-columns: 1fr;
    }
    header h1 {
        font-size: 1.75rem;
    }
}