:root {
    --color-primary: #4e007a;
    --color-primary-dark: #2e004a;
    --color-primary-darker: #1b002a;
    --color-light: #c9a0ff;
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --transition: 0.3s ease-in-out;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light) 100%);
    color: var(--color-gray-800);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header {
    background-color: var(--color-primary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo a {
    color: var(--color-white);
    text-decoration: none;
    font-size: 2.5rem;
    font-weight: bold;
    transition: var(--transition);
}

.logo a:hover {
    transform: scale(1.05);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-list {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-list a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.nav-list a:hover,
.nav-list a.active {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--color-white);
    border-radius: 50%;
}

.main {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeIn 1s forwards;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    opacity: 0;
    animation: fadeIn 1s 0.5s forwards;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.content-section {
    margin-bottom: 4rem;
    background-color: var(--color-white);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.content-section:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.team-member {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.team-member::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    opacity: 0;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.team-member:hover::before {
    opacity: 1;
}

.member-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    border: 4px solid var(--color-white);
    overflow: hidden;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.team-member:hover .member-image {
    transform: scale(1.1);
    border-color: var(--color-light);
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.member-role {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.member-duty {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.footer {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
    padding: 3rem 2rem;
    margin-top: auto;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    opacity: 0.5;
}

.footer-logo {
    height: auto;
    width: 150px;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    filter: brightness(0) invert(1);
}

.footer p {
    position: relative;
    z-index: 1;
    opacity: 0.9;
}

/* Botões modernos */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(0);
}

/* Sistema de abas moderno */
.tabs {
    width: 100%;
}

.tab-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    background: var(--color-gray-100);
    padding: 0.5rem;
    border-radius: var(--border-radius-lg);
    overflow-x: auto;
}

.tab-btn {
    padding: 1rem 2rem;
    background: transparent;
    color: var(--color-gray-600);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    white-space: nowrap;
    position: relative;
}

.tab-btn:hover {
    background: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--color-white);
    color: var(--color-primary);
    box-shadow: var(--shadow);
}

.tab-content {
    display: none;
    padding: 2rem;
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-gray-200);
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
    display: block;
}

/* Centralização específica para abas de projeto */
.tab-content#repositorio,
.tab-content#mvp,
.tab-content#video-finalizado {
    text-align: center;
    min-height: 300px;
}

.tab-content#repositorio.active,
.tab-content#mvp.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.tab-content#video-finalizado.active {
    display: block;
}

.tab-content#video .video-container,
.tab-content#video-finalizado .video-container {
    margin: 2rem auto;
    max-width: 1000px;
}

.tab-content#video .btn,
.tab-content#video-finalizado .btn {
    margin: 1rem auto;
    display: block;
    width: fit-content;
}

.tab-content#repositorio h2,
.tab-content#mvp h2,
.tab-content#video h2,
.tab-content#video-finalizado h2 {
    color: var(--color-primary);
}

.tab-content#repositorio p,
.tab-content#mvp p {
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Container de vídeo responsivo */
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin: 2rem 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Ícones matemáticos animados */
.math-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.icon-container {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    cursor: pointer;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.icon-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
    opacity: 0;
    transition: var(--transition);
}

.icon-container:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: var(--shadow-xl);
}

.icon-container:hover::before {
    opacity: 1;
}

.icon-container i {
    color: var(--color-white);
    font-size: 2rem;
    position: relative;
    z-index: 1;
}

/* Classes utilitárias */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-6 { margin-bottom: 1.5rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.25rem; }
.mt-6 { margin-top: 1.5rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }



/* Animações */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Efeitos de confetti */
.confetti-symbol {
    position: fixed;
    font-weight: bold;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.9;
    animation: fall 2s ease-out forwards;
}

@keyframes fall {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(var(--x), var(--y)) rotate(720deg);
        opacity: 0;
    }
}

/* Responsividade */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        padding: 0 1rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav {
        width: 100%;
        display: none;
        margin-top: 1rem;
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem 0;
    }

    .nav-list a {
        display: block;
        text-align: center;
        padding: 1rem;
    }

    .main {
        padding: 1rem;
    }

    .hero {
        padding: 2rem 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .content-section {
        padding: 2rem 1.5rem;
        margin-bottom: 2rem;
    }

    .tab-buttons {
        flex-direction: column;
        gap: 0.25rem;
    }

    .tab-btn {
        padding: 0.875rem 1.5rem;
        text-align: center;
    }

    .math-icons {
        gap: 1rem;
    }

    .icon-container {
        width: 60px;
        height: 60px;
    }

    .icon-container i {
        font-size: 1.5rem;
    }

    .team-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .team-member {
        padding: 1.5rem;
    }

    .member-image {
        width: 100px;
        height: 100px;
    }

    .footer {
        padding: 2rem 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .content-section {
        padding: 1.5rem 1rem;
    }

    .icon-container {
        width: 50px;
        height: 50px;
    }

    .icon-container i {
        font-size: 1.2rem;
    }

    .team-member {
        padding: 1rem;
    }

    .member-image {
        width: 80px;
        height: 80px;
    }

    .member-name {
        font-size: 1.25rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .tab-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
}

.confetti-symbol {
  position: fixed;
  font-weight: bold;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.9;
  animation: fall 2s ease-out forwards;
}

@keyframes fall {
  0% {
    transform: translate(0, 0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translate(var(--x), var(--y)) rotate(720deg);
    opacity: 0;
  }
}