/* ============================================================
   PORTFÓLIO - DESENVOLVIMENTO WEB
   style.css - compartilhado entre todas as páginas
   ============================================================ */

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary:   #667eea;
    --secondary: #764ba2;
    --accent:    #f093fb;
    --dark:      #0f0f1a;
    --card-bg:   rgba(255, 255, 255, 0.96);
    --text:      #333;
    --muted:     #666;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: #f0f2ff;
}

/* ============================================================
   KEYFRAMES
   ============================================================ */

@keyframes gradientShift {
    0%   { background-position: 0%   50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0%   50%; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to   { opacity: 1; transform: translateY(0);    }
}

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

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4); }
    50%       { box-shadow: 0 0 0 12px rgba(102, 126, 234, 0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px);   }
    50%       { transform: translateY(-12px); }
}

@keyframes spinSlow {
    from { transform: rotate(0deg);   }
    to   { transform: rotate(360deg); }
}

@keyframes particleFloat {
    0%   { transform: translateY(0)   rotate(0deg);   opacity: 0.8; }
    50%  { transform: translateY(-80px) rotate(180deg); opacity: 0.4; }
    100% { transform: translateY(0)   rotate(360deg); opacity: 0.8; }
}

@keyframes glowPulse {
    0%, 100% { text-shadow: 0 0 10px rgba(240, 147, 251, 0.3); }
    50%       { text-shadow: 0 0 30px rgba(240, 147, 251, 0.8), 0 0 60px rgba(102, 126, 234, 0.4); }
}

@keyframes borderSlide {
    0%   { background-position: 0 0, 100% 0, 100% 100%, 0 100%; }
    100% { background-position: 300% 0, 100% 300%, -200% 100%, 0 -200%; }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes typewriter {
    from { width: 0; }
    to   { width: 100%; }
}

/* ============================================================
   NAVEGAÇÃO
   ============================================================ */

nav {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.menu {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

.menu > li {
    position: relative;
}

.menu > li > a {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 1rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 0.5px;
}

.menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.menu > li > a:hover::after {
    width: 80%;
}

.menu > li > a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 290px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    list-style: none;
    border-radius: 0 0 12px 12px;
    overflow: hidden;
    border-top: 3px solid var(--primary);
}

.menu > li:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li a {
    display: block;
    padding: 0.85rem 1.5rem;
    border-bottom: 1px solid #f0f0f0;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.submenu li a:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.08), transparent);
    color: var(--primary);
    padding-left: 2rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 30px;
    height: 25px;
    cursor: pointer;
    padding: 1rem;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: white;
    margin: 3px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* ============================================================
   HERO - INDEX
   ============================================================ */

#hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(-45deg, #0f0f1a, #1a1a2e, #16213e, #0f3460, #533483);
    background-size: 400% 400%;
    animation: gradientShift 10s ease infinite;
    position: relative;
    overflow: hidden;
    padding: 4rem 2rem;
}

/* Partículas decorativas (CSS puro) */
.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-particles span {
    position: absolute;
    display: block;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.3);
    animation: particleFloat linear infinite;
}

.hero-particles span:nth-child(1)  { width: 12px; height: 12px; left: 8%;  top: 70%; animation-duration: 6s;  animation-delay: 0s;  }
.hero-particles span:nth-child(2)  { width: 8px;  height: 8px;  left: 18%; top: 40%; animation-duration: 8s;  animation-delay: 1s;  background: rgba(240, 147, 251, 0.3); }
.hero-particles span:nth-child(3)  { width: 16px; height: 16px; left: 30%; top: 80%; animation-duration: 5s;  animation-delay: 2s;  }
.hero-particles span:nth-child(4)  { width: 6px;  height: 6px;  left: 42%; top: 20%; animation-duration: 9s;  animation-delay: 0.5s; background: rgba(240, 147, 251, 0.4); }
.hero-particles span:nth-child(5)  { width: 20px; height: 20px; left: 55%; top: 65%; animation-duration: 7s;  animation-delay: 3s;  }
.hero-particles span:nth-child(6)  { width: 10px; height: 10px; left: 65%; top: 30%; animation-duration: 6s;  animation-delay: 1.5s; background: rgba(240, 147, 251, 0.3); }
.hero-particles span:nth-child(7)  { width: 14px; height: 14px; left: 75%; top: 75%; animation-duration: 8s;  animation-delay: 2.5s; }
.hero-particles span:nth-child(8)  { width: 7px;  height: 7px;  left: 85%; top: 45%; animation-duration: 5s;  animation-delay: 4s;  background: rgba(102, 126, 234, 0.5); }
.hero-particles span:nth-child(9)  { width: 18px; height: 18px; left: 92%; top: 20%; animation-duration: 10s; animation-delay: 0.8s; }
.hero-particles span:nth-child(10) { width: 9px;  height: 9px;  left: 5%;  top: 30%; animation-duration: 7s;  animation-delay: 3.5s; background: rgba(240, 147, 251, 0.3); }
.hero-particles span:nth-child(11) { width: 11px; height: 11px; left: 48%; top: 90%; animation-duration: 6s;  animation-delay: 1.2s; }
.hero-particles span:nth-child(12) { width: 5px;  height: 5px;  left: 23%; top: 10%; animation-duration: 9s;  animation-delay: 2.8s; background: rgba(102, 126, 234, 0.6); }

.hero-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.9s ease both;
}

.hero-label {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: rgba(240, 147, 251, 0.9);
    letter-spacing: 3px;
    margin-bottom: 1.2rem;
    animation: glowPulse 3s ease infinite;
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 1.2rem;
    text-shadow: 0 4px 30px rgba(102, 126, 234, 0.5);
}

.hero-sub {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 550px;
    margin: 0 auto 2rem;
}

.hero-badges {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    padding: 0.4rem 1.1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 1px;
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.badge:hover {
    background: rgba(102, 126, 234, 0.4);
    border-color: var(--primary);
    transform: translateY(-3px);
}

/* ============================================================
   HEADER - PÁGINAS INTERNAS
   ============================================================ */

header:not(#hero) {
    background: linear-gradient(-45deg, #667eea, #764ba2, #f093fb, #667eea);
    background-size: 300% 300%;
    animation: gradientShift 8s ease infinite;
    color: white;
    text-align: center;
    padding: 4rem 2rem;
}

header:not(#hero) h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    margin-bottom: 0.7rem;
    animation: fadeInDown 0.7s ease both;
}

header:not(#hero) p {
    font-size: 1.15rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
    animation: fadeInUp 0.7s ease 0.2s both;
}

/* ============================================================
   MAIN & SECTIONS
   ============================================================ */

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.section-animated {
    animation: fadeInUp 0.8s ease both;
}

section, .content {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    margin-bottom: 2.5rem;
    border: 1px solid rgba(102, 126, 234, 0.08);
    transition: box-shadow 0.3s ease;
}

section:hover, .content:hover {
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.12);
}

section h2, .content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.6rem;
    border-bottom: 3px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(90deg, var(--primary), var(--accent)) border-box;
    border-bottom: 3px solid;
    border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
    display: inline-block;
    width: 100%;
}

section h3 {
    color: var(--secondary);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.section-desc {
    color: var(--muted);
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

section p, .content p {
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
    text-align: justify;
    color: #444;
}

/* ============================================================
   CARDS - SOBRE O PORTFÓLIO
   ============================================================ */

.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    margin-top: 1.5rem;
}

article.card {
    background: var(--card-bg);
    border: 1px solid rgba(102, 126, 234, 0.15);
    border-radius: 20px;
    padding: 2rem;
    width: 100%;
    max-width: 340px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

article.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

article.card:hover::before {
    transform: scaleX(1);
}

article.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(102, 126, 234, 0.2);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    animation: float 4s ease-in-out infinite;
}

article.card h2 {
    font-size: 1.4rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.8rem;
    border: none;
    padding: 0;
    display: block;
    width: auto;
}

article.card p {
    color: var(--muted);
    font-size: 0.97rem;
    text-align: center;
    flex: 1;
}

article.card footer {
    margin-top: 1.2rem;
    font-size: 0.8rem;
    color: #aaa;
    border-top: 1px solid #f0f0f0;
    padding-top: 1rem;
    font-style: italic;
    background: transparent;
    text-align: center;
}

article.card audio {
    width: 100%;
    height: 45px;
    margin: 15px 0;
    border-radius: 10px;
}

/* ============================================================
   CARDS - PROJETOS
   ============================================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 1.5rem;
}

.project-card {
    background: white;
    border-radius: 16px;
    padding: 1.8rem;
    border: 1px solid rgba(102, 126, 234, 0.12);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.04), rgba(240, 147, 251, 0.04));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.18);
    border-color: rgba(102, 126, 234, 0.3);
}

.project-card:hover::after {
    opacity: 1;
}

.project-number {
    font-size: 3.5rem;
    font-weight: 900;
    color: rgba(102, 126, 234, 0.12);
    line-height: 1;
    margin-bottom: 0.5rem;
    font-family: 'Courier New', monospace;
}

.project-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #222;
    margin-bottom: 0.8rem;
}

.project-card p {
    font-size: 0.93rem;
    color: var(--muted);
    margin-bottom: 1.2rem;
    line-height: 1.6;
    text-align: left;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.tag {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.7rem;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.project-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    padding: 0.55rem 1.2rem;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.45);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

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

/* ============================================================
   SEÇÃO REPOSITÓRIO
   ============================================================ */

.repo-section {
    text-align: center;
    background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    color: white;
    border: none;
}

.repo-section h2 {
    color: white;
    border-image: linear-gradient(90deg, var(--accent), var(--primary)) 1;
}

.repo-section p {
    color: rgba(255, 255, 255, 0.75);
    max-width: 600px;
    margin: 0 auto 2rem;
    text-align: center;
}

.btn-repo {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    animation: pulse 2.5s ease infinite;
}

.btn-repo:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

/* ============================================================
   ANIMAÇÃO DE ENTRADA - CARD
   ============================================================ */

.card-animated {
    animation: fadeInUp 0.6s ease both;
}

.cards-container .card-animated:nth-child(1) { animation-delay: 0.05s; }
.cards-container .card-animated:nth-child(2) { animation-delay: 0.15s; }
.cards-container .card-animated:nth-child(3) { animation-delay: 0.25s; }

.projects-grid .card-animated:nth-child(1) { animation-delay: 0.05s; }
.projects-grid .card-animated:nth-child(2) { animation-delay: 0.12s; }
.projects-grid .card-animated:nth-child(3) { animation-delay: 0.19s; }
.projects-grid .card-animated:nth-child(4) { animation-delay: 0.26s; }
.projects-grid .card-animated:nth-child(5) { animation-delay: 0.33s; }

/* ============================================================
   LISTAS, TABELAS, FORMULÁRIOS
   ============================================================ */

ul, ol {
    padding-left: 2rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

table th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid #f0f0f0;
    color: #444;
    transition: background 0.2s ease;
}

table tr:hover td {
    background-color: rgba(102, 126, 234, 0.04);
}

/* ============================================================
   FORMULÁRIOS
   ============================================================ */

label {
    color: #555;
    font-weight: 600;
    display: block;
    margin-top: 1.2rem;
    font-size: 0.95rem;
}

input, select, textarea {
    width: 100%;
    background-color: #fafafe;
    border: 1.5px solid #e0e0f0;
    color: #333;
    padding: 0.75rem 1rem;
    margin-top: 0.4rem;
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input[type="radio"],
input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.12);
    background: white;
}

button {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    padding: 0.8rem 1.8rem;
    margin-right: 10px;
    margin-top: 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.25s ease;
    letter-spacing: 0.3px;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

button[type="reset"] {
    background: #f1f3f5;
    color: #495057;
}

button[type="reset"]:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* ============================================================
   FOOTER
   ============================================================ */

footer, #rodape-principal {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    padding: 2.5rem 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.55);
    margin-top: 3rem;
    font-size: 0.9rem;
    line-height: 2;
}

footer a, #rodape-principal a {
    color: rgba(240, 147, 251, 0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

footer a:hover, #rodape-principal a:hover {
    color: #f093fb;
}

/* ============================================================
   BACKGROUND ALTERNATIVO (CARDS PAGE)
   ============================================================ */

body.cards-bg {
    background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.8)),
        url('https://images.unsplash.com/photo-1514525253161-7a46d19cd819?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80')
        center/cover no-repeat fixed;
    min-height: 100vh;
}

/* ============================================================
   RESPONSIVO
   ============================================================ */

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .menu {
        position: fixed;
        top: 56px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 56px);
        background: #1a1a2e;
        flex-direction: column;
        transition: left 0.3s ease;
        overflow-y: auto;
    }

    .menu.active {
        left: 0;
    }

    .menu > li {
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .submenu {
        position: static;
        max-height: 0;
        overflow: hidden;
        background: rgba(255,255,255,0.05);
        box-shadow: none;
        border-radius: 0;
        border-top: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        transition: max-height 0.3s ease;
    }

    .submenu li a {
        color: rgba(255,255,255,0.75);
        border-bottom-color: rgba(255,255,255,0.06);
        padding-left: 2.5rem;
    }

    .submenu li a:hover {
        color: white;
        background: rgba(102, 126, 234, 0.15);
    }

    .menu > li:hover .submenu {
        max-height: 500px;
    }

    main {
        padding: 2rem 1rem;
    }

    section, .content {
        padding: 2rem 1.2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    #hero {
        min-height: 70vh;
    }
}

/* ===== Aula 6 – Tela de Login ===== */

.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 60px);
    padding: 40px 20px;
    background-color: #f4f7f6;
}

.login-container {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    width: 100%;
    max-width: 360px;
}

.login-container h1 {
    text-align: center;
    color: #2c3e50;
    font-size: 22px;
    margin-bottom: 4px;
}

.login-container .subtitulo {
    text-align: center;
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #34495e;
    font-weight: bold;
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #bdc3c7;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 14px;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color 0.3s;
}

.btn-login:hover {
    background-color: #2980b9;
}

/* ===== Aula 6 – Botões e Alertas ===== */

.botao {
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#botao_A {
    background-color: red;
}

#botao_B {
    background-color: green;
}

#botao_C {
    background-color: blue;
}