:root {
    --primary-color: #00aaff;
    --secondary-color: #00bfff;
    --accent-color: #ffeb3b;
    --text-color: #333;
    --text-secondary: #555;
    --bg-gradient-start: #e0f7fa;
    --bg-gradient-end: #fff;
    --shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 170, 255, 0.5);
    --transition-fast: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius-md: 15px;
    --border-radius-sm: 10px;
    --border-radius-xs: 5px;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity var(--transition-slow);
    scroll-behavior: smooth;
}

body.loaded {
    opacity: 1;
}

body.dark-mode {
    --bg-gradient-start: #1a1a1a;
    --bg-gradient-end: #333;
    --text-color: #ddd;
    --text-secondary: #aaa;
    --primary-color: #00bfff;
    --secondary-color: #00aaff;
    --accent-color: #ffd700;
    --shadow-soft: 0 4px 15px rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 255, 255, 0.3);
}

body.dark-mode section {
    background: rgba(0, 0, 0, 0.8);
}

body.dark-mode .sobre-mi-text {
    background: rgba(0, 0, 0, 0.8);
}

body.dark-mode h1, body.dark-mode h2 {
    color: var(--primary-color);
}

body.dark-mode section p {
    color: var(--text-secondary);
}

header {
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    padding: 20px;
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

nav {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu-toggle {
    display: none;
    font-size: 24px;
    color: #fff;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.menu-toggle:hover {
    transform: rotate(90deg);
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
    transition: all var(--transition-fast);
}

.nav-menu li {
    margin: 0 15px;
}

.dark-mode-toggle {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: #fff;
    margin: 0 15px;
    transition: transform var(--transition-fast);
}

.dark-mode-toggle:hover {
    transform: scale(1.2);
}

.contact-form-item {
    position: relative;
}

.contact-form-toggle {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.contact-form-toggle:hover {
    color: var(--accent-color);
    transform: scale(1.05);
}

.contact-form {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-soft);
    z-index: 1000;
    flex-direction: column;
    gap: 10px;
    width: 300px;
    animation: fadeInScale 0.4s ease-out;
}

.contact-form.active {
    display: flex;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius-xs);
    font-family: 'Poppins', sans-serif;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(255, 235, 59, 0.3);
}

.contact-form button {
    padding: 10px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: var(--border-radius-xs);
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.contact-form button:hover {
    background: #008080;
    transform: translateY(-2px);
}

.contact-form button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: all var(--transition-fast);
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: width var(--transition-fast);
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

main {
    text-align: center;
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn var(--transition-slow);
}

.logo {
    max-width: 250px;
    border-radius: var(--border-radius-md);
    border: 5px solid var(--primary-color);
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    display: block;
    margin: 0 auto;
}

.logo:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 30px rgba(0, 170, 255, 0.8);
    filter: brightness(1.1);
}

h1 {
    color: var(--primary-color);
    font-size: 2.5em;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    animation: bounceIn 1.5s ease;
}

h2 {
    color: var(--primary-color);
    font-size: 2em;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    text-align: center;
}

h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
    margin: 10px auto 0;
    transition: width var(--transition-fast);
}

h2:hover::after {
    width: 100px;
}

section {
    margin-top: 60px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-soft);
    text-align: left;
    animation: slideUp 1s ease-out;
    overflow: hidden;
    transform: translateZ(0);
}

section:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

section.hidden {
    opacity: 0;
    transform: translateY(50px);
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

section p {
    font-size: 1.1em;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

section p:hover {
    color: var(--text-color);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.gallery-image {
    width: 100%;
    height: auto;
    transition: transform var(--transition-fast), filter var(--transition-fast);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.1);
    filter: brightness(0.9) contrast(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 170, 255, 0.7);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-text {
    font-size: 1.2em;
    font-weight: 600;
    text-align: center;
    padding: 10px;
    transform: translateY(20px);
    transition: transform var(--transition-fast);
}

.gallery-item:hover .gallery-text {
    transform: translateY(0);
}

.sobre-mi-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    animation: fadeIn 1.2s ease-in;
    position: relative;
    perspective: 1000px;
}

.sobre-mi-image {
    max-width: 300px;
    border-radius: 50%;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-glow);
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
    display: block;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.sobre-mi-image:hover {
    transform: scale(1.05) rotate(3deg);
    box-shadow: 0 0 40px rgba(0, 170, 255, 0.9);
    border-color: var(--accent-color);
}

.sobre-mi-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, rgba(0, 170, 255, 0.1) 70%, transparent 100%);
    animation: glow 4s infinite ease-in-out;
    z-index: -1;
}

.sobre-mi-text {
    flex: 1;
    background: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.sobre-mi-text:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.95);
}

footer {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    padding: 20px;
    text-align: center;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    margin-top: 60px;
}

footer a {
    margin: 0 10px;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
}

footer a::before {
    content: attr(data-icon);
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    margin-right: 5px;
    transition: transform var(--transition-fast);
}

footer a:hover::before {
    transform: scale(1.2);
}

footer a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

.success-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-soft);
    z-index: 1000;
    text-align: center;
    animation: fadeInScale 0.3s ease-in;
    max-width: 90%;
}

body.dark-mode .success-modal {
    background: #333;
    color: var(--text-color);
}

.success-modal p {
    margin: 0 0 15px;
    font-size: 1.1em;
}

.success-modal button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius-xs);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.success-modal button:hover {
    background: #008080;
}

.error {
    display: block;
    color: red;
    font-size: 0.8em;
    margin-top: 5px;
    text-align: left;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #fff;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 5px;
}

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--border-radius-sm);
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    transition: opacity var(--transition-fast);
}

.back-to-top:hover {
    opacity: 0.8;
}

section.hidden {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease-out;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

.highlight {
    animation: highlight 2s ease;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        position: absolute;
        left: 20px;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--secondary-color);
        padding: 20px 0;
        box-shadow: var(--shadow-soft);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        margin: 10px 0;
        text-align: center;
    }

    .dark-mode-toggle {
        margin: 10px 0;
    }

    .contact-form {
        position: static;
        width: 100%;
        box-shadow: none;
        padding: 10px;
    }

    .contact-form.active {
        display: flex;
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.8em;
    }

    section {
        padding: 20px;
    }

    section p {
        font-size: 1em;
    }

    .gallery {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .sobre-mi-container {
        flex-direction: column;
        text-align: center;
    }

    .sobre-mi-image {
        max-width: 200px;
    }

    .logo {
        max-width: 180px;
    }

    footer a {
        display: block;
        margin: 10px 0;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5em;
    }

    h2 {
        font-size: 1.5em;
    }

    section p {
        font-size: 0.9em;
    }

    .gallery {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .sobre-mi-image {
        max-width: 150px;
    }

    .logo {
        max-width: 150px;
    }

    header {
        padding: 15px;
    }

    footer {
        padding: 15px;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes bounceIn {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

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

@keyframes glow {
    0% { transform: rotate(0deg); opacity: 0.5; }
    50% { opacity: 1; }
    100% { transform: rotate(360deg); opacity: 0.5; }
}

@keyframes highlight {
    0% { background: rgba(255, 235, 59, 0.3); }
    100% { background: transparent; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}