@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --orange: #FF6B00;
    --navy: #041E42;
    --navy-light: #0a2d5e;
    --sidebar-w: 240px;
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-400: #94A3B8;
    --gray-600: #475569;
    --gray-800: #1E293B;
    --blue: #0056b3;
    --green: #25D366;
    --green-dark: #128C7E;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    min-height: 100vh;
    display: flex;
}

/* ════════════════════════════
   SIDEBAR
════════════════════════════ */
.sidebar {
    width: var(--sidebar-w);
    min-height: 100vh;
    background: var(--navy);
    position: fixed;
    top: 0; left: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 26px 20px 22px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand img {
    height: 24px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
    display: block;
    margin-bottom: 10px;
}

.sidebar-tag {
    display: inline-block;
    background: rgba(255,107,0,0.18);
    border: 1px solid rgba(255,107,0,0.4);
    color: var(--orange);
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 50px;
}

.sidebar-nav {
    flex: 1;
    padding: 18px 12px;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.nav-section-title {
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.22);
    padding: 12px 10px 5px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    text-decoration: none;
    color: rgba(255,255,255,0.58);
    font-size: 0.855rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
    border: 1px solid transparent;
    background: none;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: rgba(255,255,255,0.07);
    color: var(--white);
}

.nav-item.active {
    background: rgba(255,255,255,0.1);
    color: var(--white);
}

.nav-item.highlight {
    background: rgba(255,107,0,0.12);
    color: #FFB07A;
    border-color: rgba(255,107,0,0.22);
    margin-top: 2px;
}

.nav-item.highlight.active,
.nav-item.highlight:hover {
    background: rgba(255,107,0,0.22);
    color: var(--orange);
}

.nav-item svg { flex-shrink: 0; opacity: 0.7; }
.nav-item:hover svg,
.nav-item.active svg { opacity: 1; }

.nav-badge {
    margin-left: auto;
    background: var(--orange);
    color: var(--white);
    font-size: 0.57rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 50px;
}

.sidebar-footer {
    padding: 18px 20px;
    border-top: 1px solid rgba(255,255,255,0.07);
}

.sidebar-footer img {
    height: 16px;
    filter: brightness(0) invert(1);
    opacity: 0.22;
}

/* ════════════════════════════
   MAIN
════════════════════════════ */
.main {
    margin-left: var(--sidebar-w);
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

/* ── TOPBAR mobile ── */
.topbar {
    display: none;
    align-items: center;
    gap: 14px;
    padding: 13px 18px;
    background: var(--navy);
    position: sticky;
    top: 0;
    z-index: 99;
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--white);
    display: flex;
}

.topbar-logo {
    height: 20px;
    filter: brightness(0) invert(1);
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

.overlay.open { display: block; }

/* ════════════════════════════
   VIEW — CONTATOS
════════════════════════════ */
.view { display: none; flex-direction: column; flex: 1; }
.view.active { display: flex; }

/* HERO */
.hero {
    background: var(--navy);
    background-image:
        url('https://tic64.vertex.org.br/images/backgrounds/axes-section.svg'),
        linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    background-size: cover;
    background-position: center;
    padding: 56px 40px 90px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 64px;
    background: var(--gray-50);
    clip-path: ellipse(55% 100% at 50% 100%);
}

.logos-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.logo-oxetech { height: 33px; filter: brightness(0) invert(1); }
.logo-vertex  { height: 29px; filter: brightness(0) invert(1); }
.logo-sep { width: 1px; height: 34px; background: rgba(255,255,255,0.22); }

.hero-badge {
    display: inline-block;
    background: rgba(255,107,0,0.18);
    border: 1px solid rgba(255,107,0,0.45);
    color: var(--orange);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 20px;
}

.hero h1 {
    color: var(--white);
    font-size: clamp(1.7rem, 3.5vw, 2.8rem);
    font-weight: 800;
    line-height: 1.18;
    margin-bottom: 12px;
}

.hero h1 span { color: var(--orange); }
.hero p { color: rgba(255,255,255,0.5); font-size: 0.95rem; }

.section {
    max-width: 900px;
    margin: 0 auto;
    padding: 54px 32px;
    width: 100%;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 26px;
}

.section-label h2 {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--gray-400);
    white-space: nowrap;
}

.section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-100);
}

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.card {
    background: var(--white);
    border-radius: 18px;
    padding: 32px 24px;
    border: 1px solid rgba(0,0,0,0.055);
    box-shadow: 0 4px 18px rgba(0,0,0,0.055);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 38px rgba(0,0,0,0.1);
}

.card-accent {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 18px 18px 0 0;
}

.accent-orange { background: var(--orange); }
.accent-blue   { background: var(--blue); }
.accent-gray   { background: #CBD5E1; }
.accent-green  { background: var(--green); }

.avatar-wrap { position: relative; margin: 10px 0 16px; }

.avatar-ring {
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px dashed transparent;
}

.ring-orange { border-color: rgba(255,107,0,0.35); }
.ring-blue   { border-color: rgba(0,86,179,0.35); }

.avatar {
    width: 104px;
    height: 104px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--white);
    box-shadow: 0 4px 16px rgba(0,0,0,0.13);
    display: block;
}

.role-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 8px;
}

.badge-orange { background: #FFF0E6; color: var(--orange); }
.badge-blue   { background: #E8F0FD; color: var(--blue); }
.badge-gray   { background: #F1F5F9; color: var(--gray-600); }
.badge-green  { background: #E6F9F0; color: var(--green-dark); }

.card h3 {
    font-size: 1.12rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 7px;
}

.desc {
    font-size: 0.84rem;
    color: var(--gray-400);
    line-height: 1.55;
    margin-bottom: 20px;
    flex: 1;
}

.icon-box {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px 0 16px;
}

.icon-gray  { background: #F1F5F9; }
.icon-green { background: #E6F9F0; }

.email-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-100);
    color: var(--navy);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.79rem;
    padding: 10px 16px;
    border-radius: 50px;
    border: 1px solid rgba(0,0,0,0.05);
    transition: background 0.2s, color 0.2s;
    word-break: break-all;
}

.email-btn:hover { background: var(--navy); color: var(--white); }
.email-btn svg { flex-shrink: 0; }

.sala-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--orange);
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.92rem;
    padding: 13px 28px;
    border-radius: 50px;
    box-shadow: 0 4px 16px rgba(255,107,0,0.35);
    transition: background 0.25s, transform 0.25s;
    margin-top: 22px;
}

.sala-btn:hover { background: #e05f00; transform: scale(1.04); }

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--green);
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.92rem;
    padding: 13px 28px;
    border-radius: 50px;
    box-shadow: 0 4px 16px rgba(37,211,102,0.28);
    transition: background 0.25s, transform 0.25s;
}

.whatsapp-btn:hover { background: var(--green-dark); transform: scale(1.04); }

/* ════════════════════════════
   VIEW — ATIVIDADE DA SEMANA
════════════════════════════ */
.ativ-header {
    background: var(--navy);
    background-image:
        url('https://tic64.vertex.org.br/images/backgrounds/axes-section.svg'),
        linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    background-size: cover;
    background-position: center;
    padding: 44px 40px 72px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.ativ-header::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 52px;
    background: var(--gray-50);
    clip-path: ellipse(55% 100% at 50% 100%);
}

.ativ-header .hero-badge { margin-bottom: 14px; }

.ativ-drive-info {
    margin-top: 14px;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.38);
    letter-spacing: 0.02em;
}

.ativ-header h1 {
    color: var(--white);
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 10px;
}

.ativ-header h1 span { color: var(--orange); }
.ativ-header p { color: rgba(255,255,255,0.5); font-size: 0.92rem; }

/* stats bar */
.stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 22px;
    flex-wrap: wrap;
}

.stat-chip {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 7px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.stat-chip.delivered {
    background: rgba(37,211,102,0.18);
    border: 1px solid rgba(37,211,102,0.35);
    color: #4ADE80;
}

.stat-chip.pending {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.55);
}

.stat-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

.stat-chip.delivered .stat-dot { background: #4ADE80; }
.stat-chip.pending .stat-dot   { background: rgba(255,255,255,0.4); }

/* search */
.ativ-body {
    max-width: 860px;
    margin: 0 auto;
    padding: 44px 28px 60px;
    width: 100%;
}

.search-wrap {
    position: relative;
    margin-bottom: 28px;
}

.search-wrap svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 13px 16px 13px 44px;
    border: 1.5px solid var(--gray-200);
    border-radius: 12px;
    font-size: 0.92rem;
    font-family: inherit;
    color: var(--gray-800);
    background: var(--white);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    border-color: var(--orange);
    box-shadow: 0 0 0 3px rgba(255,107,0,0.1);
}

.search-input::placeholder { color: var(--gray-400); }

/* student list */
.student-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.student-row {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--white);
    border: 1px solid rgba(0,0,0,0.055);
    border-radius: 14px;
    padding: 14px 18px;
    transition: box-shadow 0.2s, transform 0.2s;
}

.student-row:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transform: translateX(3px);
}

.student-row.no-link { opacity: 0.75; }

.student-num {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--gray-400);
    min-width: 24px;
    text-align: right;
}

.student-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--white);
    flex-shrink: 0;
    letter-spacing: 0.03em;
}

.student-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    flex: 1;
    min-width: 0;
}

.btn-drive {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--navy);
    color: var(--white);
    text-decoration: none;
    font-size: 0.76rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 50px;
    white-space: nowrap;
    transition: background 0.2s, transform 0.15s;
    flex-shrink: 0;
}

.btn-drive:hover { background: var(--navy-light); transform: scale(1.04); }

.btn-soon {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--gray-100);
    color: var(--gray-400);
    font-size: 0.73rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 50px;
    white-space: nowrap;
    flex-shrink: 0;
}

.no-results {
    text-align: center;
    padding: 48px 0;
    color: var(--gray-400);
    font-size: 0.92rem;
}

/* ── FOOTER ── */
footer {
    background: var(--navy);
    background-image: url('https://tic64.vertex.org.br/images/backgrounds/axes-section.svg');
    background-size: cover;
    background-position: center bottom;
    padding: 40px 20px 30px;
    text-align: center;
    margin-top: auto;
}

.footer-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-logos img {
    height: 22px;
    opacity: 0.45;
    filter: brightness(0) invert(1);
    transition: opacity 0.2s;
}

.footer-logos img:hover { opacity: 0.8; }
.footer-sep-f { width: 1px; height: 20px; background: rgba(255,255,255,0.16); }
footer p { color: rgba(255,255,255,0.24); font-size: 0.74rem; letter-spacing: 0.05em; }

/* ════════════════════════════
   VIEW — DICAS DE ESTUDO
════════════════════════════ */
.dicas-header {
    background: var(--navy);
    background-image:
        url('https://tic64.vertex.org.br/images/backgrounds/axes-section.svg'),
        linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
    background-size: cover;
    background-position: center;
    padding: 44px 40px 72px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.dicas-header::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 52px;
    background: var(--gray-50);
    clip-path: ellipse(55% 100% at 50% 100%);
}

.dicas-header h1 {
    color: var(--white);
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 10px;
}

.dicas-header h1 span { color: var(--orange); }
.dicas-header p { color: rgba(255,255,255,0.5); font-size: 0.92rem; }

.dicas-body {
    max-width: 760px;
    margin: 0 auto;
    padding: 44px 28px 60px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.84rem;
    font-weight: 600;
    transition: color 0.2s;
    align-self: flex-start;
}

.back-btn:hover { color: var(--navy); }
.back-btn svg { flex-shrink: 0; transition: transform 0.2s; }
.back-btn:hover svg { transform: translateX(-3px); }

/* Post card */
.post-card {
    background: var(--white);
    border-radius: 18px;
    border: 1px solid rgba(0,0,0,0.055);
    box-shadow: 0 4px 18px rgba(0,0,0,0.055);
    overflow: hidden;
}

.post-card-top {
    border-bottom: 1px solid var(--gray-100);
    padding: 20px 28px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.post-author-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.post-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--white);
    flex-shrink: 0;
}

.post-author-name {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--navy);
    display: block;
}

.post-meta {
    font-size: 0.75rem;
    color: var(--gray-400);
    display: block;
    margin-top: 2px;
}

.post-tag {
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 50px;
    white-space: nowrap;
}

.tag-orange { background: #FFF0E6; color: var(--orange); }

.post-body {
    padding: 28px 28px 34px;
}

.post-body h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 22px;
    line-height: 1.3;
}

.post-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.post-content p {
    font-size: 0.915rem;
    color: var(--gray-600);
    line-height: 1.74;
}

.post-content a {
    color: var(--orange);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(255,107,0,0.25);
    transition: border-color 0.2s;
}

.post-content a:hover { border-bottom-color: var(--orange); }

.code-block-wrap {
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.1);
    margin-top: 6px;
}

.code-block-header {
    background: #1E293B;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 18px;
}

.code-block-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.09);
    color: rgba(255,255,255,0.65);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 8px;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 5px 12px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    font-family: inherit;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.17);
    color: var(--white);
}

.copy-btn.copied {
    background: rgba(37,211,102,0.18);
    color: #4ADE80;
    border-color: rgba(37,211,102,0.28);
}

.code-block {
    background: #0F172A;
    padding: 20px 22px;
    overflow-y: auto;
    max-height: 400px;
    font-size: 0.79rem;
    line-height: 1.76;
    color: #CBD5E1;
    font-family: 'Fira Code', 'JetBrains Mono', 'Courier New', monospace;
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

/* ════════════════════════════
   RESPONSIVE
════════════════════════════ */
@media (max-width: 768px) {
    body { display: block; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-left: 0; }
    .topbar { display: flex; }
    .hero, .ativ-header { padding: 40px 20px 75px; }
    .logo-sep { display: none; }
    .section, .ativ-body { padding: 36px 16px 48px; }
    .student-num { display: none; }
    .dicas-header { padding: 40px 20px 75px; }
    .dicas-body { padding: 36px 16px 48px; }
    .post-card-top { padding: 16px 18px 14px; }
    .post-body { padding: 22px 18px 26px; }
    .post-body h2 { font-size: 1.1rem; }
}