@import url('https://fonts.googleapis.com/css2?family=Archivo+Black&family=Bebas+Neue&family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap');

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

/* ===== LIGHT MODE (default) ===== */
:root {
  --green: #26a269;
  --green-dark: #1a7a4e;
  --green-light: #34c47e;
  --body-bg: #ffffff;
  --card-bg: #ffffff;
  --section-alt-bg: #f7f7f7;
  --text: #0a0a0a;
  --muted: #555555;
  --border: #e0e0e0;
  --nav-bg: rgba(255,255,255,0.92);
  --nav-border: rgba(0,0,0,0.08);
  --footer-bg: #0a0a0a;
  --code-bg: #111111;
  --compare-legacy-bg: #f5f5f5;
  --compare-legacy-text: #888;
  --compare-modern-bg: #f0faf5;
  --input-bg: #f7f7f7;
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --body-bg: #0a0a0a;
  --card-bg: #141414;
  --section-alt-bg: #111111;
  --text: #ffffff;
  --muted: #999999;
  --border: #222222;
  --nav-bg: rgba(10,10,10,0.92);
  --nav-border: rgba(255,255,255,0.08);
  --footer-bg: #050505;
  --code-bg: #0d0d0d;
  --compare-legacy-bg: #141414;
  --compare-legacy-text: #666;
  --compare-modern-bg: #0f1f16;
  --input-bg: #1a1a1a;
}

/* ===== BASE ===== */
html { scroll-behavior: smooth; }
body {
  font-family: 'Ubuntu', system-ui, sans-serif;
  color: var(--text);
  background: var(--body-bg);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: 'Archivo Black', sans-serif; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px;
  font-family: 'Ubuntu', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  cursor: pointer; border: 2px solid transparent;
  transition: all 0.2s ease; text-decoration: none;
  letter-spacing: 0.3px;
}
.btn-primary { background: var(--green); color: #fff; border-color: var(--green); }
.btn-primary:hover { background: var(--green-dark); border-color: var(--green-dark); }
.btn-outline { background: transparent; color: var(--green); border-color: var(--green); }
.btn-outline:hover { background: var(--green); color: #fff; }
.btn-ghost { background: rgba(255,255,255,0.08); color: #fff; border-color: rgba(255,255,255,0.2); }
.btn-ghost:hover { background: rgba(255,255,255,0.18); }
.btn-lg { padding: 15px 36px; font-size: 1.05rem; }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  z-index: 1000; width: calc(100% - 48px); max-width: 960px;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--nav-bg); border: 1px solid var(--nav-border);
  border-radius: 50px; padding: 10px 22px;
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  transition: background 0.3s;
}
.nav-logo { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.nav-logo img { width: 30px; height: 30px; }
.nav-logo span {
  font-family: 'Archivo Black', sans-serif;
  font-size: 1.1rem; color: var(--text); letter-spacing: -0.3px;
}
.nav-logo em { font-style: normal; color: var(--green); }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  font-family: 'Ubuntu', sans-serif;
  font-size: 0.88rem; font-weight: 500; color: var(--text);
  padding: 7px 16px; border-radius: 50px; transition: background 0.2s, color 0.2s;
}
.nav-links a:hover, .nav-links a.active { background: rgba(38,162,105,0.12); color: var(--green); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* ===== MOBILE MENU ===== */
.mobile-menu {
  display: none; flex-direction: column;
  position: fixed; top: 80px; left: 50%; transform: translateX(-50%);
  width: calc(100% - 48px); max-width: 960px;
  background: var(--nav-bg); border: 1px solid var(--nav-border);
  border-radius: 16px; padding: 12px 16px;
  backdrop-filter: blur(18px); z-index: 999;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 10px 14px; font-size: 0.95rem; font-weight: 500;
  color: var(--text); border-radius: 8px; transition: background 0.2s;
  font-family: 'Ubuntu', sans-serif;
}
.mobile-menu a:hover { background: rgba(38,162,105,0.1); color: var(--green); }

/* ===== SECTIONS ===== */
.section { padding: 88px 0; background: var(--body-bg); }
.section-alt { background: var(--section-alt-bg); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block; background: rgba(38,162,105,0.1);
  color: var(--green); font-size: 0.72rem; font-weight: 700;
  font-family: 'Ubuntu', sans-serif;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 5px 14px; border-radius: 50px; margin-bottom: 14px;
  border: 1px solid rgba(38,162,105,0.25);
}
.section-header h2 {
  font-family: 'Archivo Black', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  color: var(--text); line-height: 1.2; margin-bottom: 14px;
}
.section-header p { color: var(--muted); font-size: 1rem; font-family: 'Ubuntu', sans-serif; }
.section-cta { text-align: center; margin-top: 44px; }

/* ===== TWO COL PLATFORM ===== */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.platform-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px; padding: 36px 32px; transition: box-shadow 0.2s, transform 0.2s; }
.platform-card:hover { box-shadow: 0 8px 32px rgba(38,162,105,0.12); transform: translateY(-3px); }
.platform-icon { width: 56px; height: 56px; background: rgba(38,162,105,0.1); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; padding: 10px; }
.platform-icon img { width: 100%; height: 100%; object-fit: contain; }
.platform-card h3 { font-family: 'Archivo Black', sans-serif; font-size: 1.2rem; color: var(--text); margin-bottom: 4px; }
.platform-sub { font-family: 'Bebas Neue', sans-serif; font-size: 1rem; color: var(--green); letter-spacing: 2px; margin-bottom: 12px; display: block; }
.platform-card p { font-size: 0.93rem; color: var(--muted); line-height: 1.7; }

/* ===== FEATURES GRID ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 28px 24px; transition: box-shadow 0.2s, transform 0.2s; }
.feature-card:hover { box-shadow: 0 6px 28px rgba(38,162,105,0.1); transform: translateY(-3px); }
.feature-icon { width: 48px; height: 48px; background: rgba(38,162,105,0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; color: var(--green); }
.feature-card h3 { font-family: 'Archivo Black', sans-serif; font-size: 0.95rem; color: var(--text); margin-bottom: 8px; }
.feature-card p { font-size: 0.88rem; color: var(--muted); line-height: 1.65; }

/* ===== COMPARE TABLE ===== */
.compare-table { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--card-bg); }
.compare-header { display: grid; grid-template-columns: 1fr 1fr; }
.compare-header .compare-col { padding: 16px 28px; font-family: 'Bebas Neue', sans-serif; font-size: 1rem; letter-spacing: 2px; }
.compare-header .legacy { background: var(--compare-legacy-bg); color: var(--compare-legacy-text); }
.compare-header .modern { background: var(--green); color: #fff; }
.compare-row { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--border); }
.compare-row .compare-col { padding: 22px 28px; }
.compare-row .legacy { background: var(--compare-legacy-bg); }
.compare-row .modern { background: var(--compare-modern-bg); }
.compare-col strong { display: block; font-family: 'Archivo Black', sans-serif; font-size: 0.9rem; color: var(--text); margin: 6px 0; }
.compare-col p { font-size: 0.87rem; color: var(--muted); line-height: 1.6; }
.compare-icon { font-size: 1.1rem; font-weight: 700; }
.compare-icon.bad { color: #e05252; }
.compare-icon.good { color: var(--green); }

/* ===== CODE PREVIEW ===== */
.code-preview { background: var(--code-bg); border: 1px solid rgba(255,255,255,0.08); border-radius: 12px; overflow: hidden; max-width: 640px; margin: 0 auto; }
.code-header { display: flex; align-items: center; gap: 7px; padding: 12px 18px; background: rgba(255,255,255,0.03); border-bottom: 1px solid rgba(255,255,255,0.06); }
.code-dot { width: 12px; height: 12px; border-radius: 50%; }
.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }
.code-title { font-family: 'Ubuntu', sans-serif; font-size: 0.8rem; color: rgba(255,255,255,0.35); margin-left: 6px; }
.code-preview pre { padding: 24px; overflow-x: auto; }
.code-preview code { font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace; font-size: 0.88rem; color: #e0e0e0; line-height: 1.8; }
.code-comment { color: #555; }

/* ===== CTA SECTION ===== */
.cta-section { background: #0a0a0a; padding: 88px 0; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 600px; height: 600px; background: radial-gradient(circle, rgba(38,162,105,0.1) 0%, transparent 70%); pointer-events: none; }
.cta-section h2 { font-family: 'Bebas Neue', sans-serif; font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: 3px; color: #fff; margin-bottom: 16px; position: relative; }
.cta-section p { font-family: 'Ubuntu', sans-serif; color: rgba(255,255,255,0.55); font-size: 1.05rem; margin-bottom: 36px; position: relative; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; }

/* ===== FOOTER ===== */
.footer { background: var(--footer-bg); color: rgba(255,255,255,0.55); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 280px; margin: 14px 0 20px; font-family: 'Ubuntu', sans-serif; }
.social-links { display: flex; gap: 10px; }
.social-link { width: 36px; height: 36px; border-radius: 8px; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.45); transition: all 0.2s; }
.social-link:hover { background: var(--green); color: #fff; }
.footer-col h4 { font-family: 'Bebas Neue', sans-serif; font-size: 1rem; letter-spacing: 2px; color: #fff; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-family: 'Ubuntu', sans-serif; font-size: 0.88rem; color: rgba(255,255,255,0.45); transition: color 0.2s; }
.footer-col ul a:hover { color: var(--green); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; font-family: 'Ubuntu', sans-serif; font-size: 0.82rem; color: rgba(255,255,255,0.25); flex-wrap: wrap; gap: 12px; }
.footer-bottom a { color: rgba(255,255,255,0.35); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--green); }

/* ===== PAGE HERO ===== */
.page-hero { background: #0a0a0a; padding: 140px 0 72px; text-align: center; position: relative; overflow: hidden; border-bottom: 1px solid rgba(38,162,105,0.15); }
.page-hero::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 500px; height: 500px; background: radial-gradient(circle, rgba(38,162,105,0.1) 0%, transparent 70%); pointer-events: none; }
.page-hero .section-tag { position: relative; }
.page-hero h1 { font-family: 'Bebas Neue', sans-serif; font-size: clamp(3rem, 6vw, 5rem); letter-spacing: 3px; color: #fff; margin: 14px 0 16px; position: relative; }
.page-hero p { font-family: 'Ubuntu', sans-serif; color: rgba(255,255,255,0.6); font-size: 1.05rem; max-width: 580px; margin: 0 auto; position: relative; }

/* ===== FEATURES PAGE ===== */
.features-full { display: flex; flex-direction: column; gap: 24px; }
.feature-block { display: grid; grid-template-columns: 80px 1fr; gap: 28px; align-items: start; padding: 32px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px; transition: box-shadow 0.2s; }
.feature-block:hover { box-shadow: 0 4px 24px rgba(38,162,105,0.08); }
.feature-block-icon { width: 56px; height: 56px; background: rgba(38,162,105,0.1); border-radius: 14px; display: flex; align-items: center; justify-content: center; color: var(--green); }
.feature-block h3 { font-family: 'Archivo Black', sans-serif; font-size: 1.1rem; color: var(--text); margin-bottom: 8px; }
.feature-block p { font-size: 0.93rem; color: var(--muted); line-height: 1.75; }
.feature-block-num { font-family: 'Bebas Neue', sans-serif; font-size: 0.9rem; color: var(--green); letter-spacing: 2px; margin-bottom: 6px; display: block; }

.webmail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.webmail-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.webmail-card-emoji { font-size: 1.8rem; margin-bottom: 14px; }
.webmail-card h3 { font-family: 'Archivo Black', sans-serif; font-size: 1rem; color: var(--text); margin-bottom: 12px; }
.webmail-card ul { display: flex; flex-direction: column; gap: 8px; }
.webmail-card ul li { font-size: 0.88rem; color: var(--muted); display: flex; gap: 8px; align-items: flex-start; }
.webmail-card ul li::before { content: '→'; color: var(--green); flex-shrink: 0; font-weight: 700; }

/* ===== SELF HOST PAGE ===== */
.steps-list { display: flex; flex-direction: column; gap: 32px; max-width: 720px; margin: 0 auto; }
.step-item { display: grid; grid-template-columns: 56px 1fr; gap: 24px; align-items: start; }
.step-num-circle { width: 56px; height: 56px; background: var(--green); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Bebas Neue', sans-serif; font-size: 1.6rem; letter-spacing: 1px; flex-shrink: 0; }
.step-item h3 { font-family: 'Archivo Black', sans-serif; font-size: 1rem; color: var(--text); margin-bottom: 6px; }
.step-item p { font-size: 0.9rem; color: var(--muted); line-height: 1.65; }
.requirements-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.req-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 22px 24px; display: flex; gap: 16px; align-items: flex-start; }
.req-icon { color: var(--green); flex-shrink: 0; margin-top: 2px; }
.req-card strong { font-family: 'Archivo Black', sans-serif; display: block; font-size: 0.88rem; color: var(--text); margin-bottom: 4px; }
.req-card span { font-size: 0.85rem; color: var(--muted); }

/* ===== CONTACT PAGE ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 48px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; padding: 20px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; }
.contact-item-icon { width: 42px; height: 42px; background: rgba(38,162,105,0.1); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--green); flex-shrink: 0; }
.contact-item strong { font-family: 'Archivo Black', sans-serif; display: block; font-size: 0.85rem; color: var(--text); margin-bottom: 4px; }
.contact-item a, .contact-item span { font-size: 0.88rem; color: var(--muted); }
.contact-item a:hover { color: var(--green); }
.contact-form { background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px; padding: 36px; }
.contact-form h3 { font-family: 'Archivo Black', sans-serif; font-size: 1.2rem; color: var(--text); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-family: 'Ubuntu', sans-serif; font-size: 0.82rem; font-weight: 700; color: var(--text); }
.form-group input, .form-group textarea, .form-group select {
  padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.9rem; color: var(--text); background: var(--input-bg);
  font-family: 'Ubuntu', sans-serif; transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(38,162,105,0.1); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; justify-content: center; }

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: none; border: 1px solid var(--border);
  cursor: pointer; color: var(--text); transition: all 0.2s; flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--green); color: var(--green); }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* ===== LOGIN ICON ===== */
.btn-login {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: none; border: 1px solid var(--border);
  color: var(--text); transition: all 0.2s; flex-shrink: 0;
}
.btn-login:hover { border-color: var(--green); color: var(--green); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .feature-block { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .two-col { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .compare-row { grid-template-columns: 1fr; }
  .compare-header { grid-template-columns: 1fr; }
  .compare-header .legacy { display: none; }
  .webmail-grid { grid-template-columns: 1fr; }
  .requirements-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 60px 0; }
}
@media (max-width: 480px) {
  .navbar { top: 12px; width: calc(100% - 24px); padding: 8px 14px; }
  .mobile-menu { top: 72px; width: calc(100% - 24px); }
}