* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html, body {
  height: 100%;
}

body {
  min-height: 100vh;
  background: var(--bg-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-content {
  flex: 1;
}

.topbar {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 36px;
  background: var(--nav-bg);
  backdrop-filter: blur(4px);
  box-shadow: 0 6px 22px rgba(13, 13, 25, 0.05);
  z-index: 50;
  animation: fadeDown 0.5s ease;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo {
  font-size: 28px;
  color: var(--accent-color);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
}

.logo:hover {
  transform: translateY(-2px);
  color: var(--accent-hover);
}

.center-menu {
  display: flex;
  gap: 24px;
  flex: 1;
  justify-content: center;
}

.right-menu {
  display: flex;
  gap: 12px;
}

.ghost-btn {
  background: transparent !important;
  border: none;
  color: var(--accent-color);
  font-weight: 600;
  padding: 8px 14px;
  cursor: pointer;
  transition: all .25s;
  border-radius: 8px;
}

.ghost-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  transform: translateY(-3px);
  box-shadow: 0 10px 22px var(--shadow-color);
}

.nav-btn {
  background: var(--accent-color);
  color: white;
  border: 1px solid var(--accent-hover);
  font-weight: 600;
  padding: 9px 18px;
  cursor: pointer;
  border-radius: 10px;
  transition: all .25s;
}

.nav-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 26px var(--shadow-color);
}

.container {
  width: 100%;
  max-width: 980px;
  margin: 120px auto 60px;
  padding: 0 18px;
}

.card {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 18px 45px var(--shadow-color);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all .20s ease;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 27px var(--shadow-color);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  color: white;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(13, 13, 255, 0.12);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: #6c757d;
  color: white;
  font-weight: 600;
}

.btn-secondary:hover {
  background: #5a6068;
}

.form-group {
  margin-bottom: 14px;
  text-align: left;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
}

input[type="text"], input[type="email"], input[type="password"], 
input[type="number"], textarea, select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  font-size: 15px;
  background: var(--input-bg);
  color: var(--text-color);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  box-shadow: 0 10px 30px rgba(66, 133, 244, 0.06);
  border-color: var(--accent-color);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: inline-block;
  vertical-align: middle;
}

.global-footer {
  width: 100%;
  text-align: center;
  padding: 16px;
  font-size: 14px;
  color: var(--text-color);
  opacity: 0.8;
  background: var(--footer-bg);
  margin-top: 60px;
  animation: fadeUp 0.4s ease;
  border-top: 1px solid var(--border-color);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Анимации */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Темы */
:root {
  --bg-color: #f6f7fb;
  --text-color: #222222;
  --card-bg: #ffffff;
  --border-color: #e8e8e8;
  --footer-bg: #f2f3f8;
  --input-bg: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --nav-bg: rgba(255, 255, 255, 0.95);
  --accent-color: #0014ff;
  --accent-hover: #000fcc;
}

[data-theme="soft"] {
  --bg-color: #f5f7fa;
  --text-color: #2d3748;
  --card-bg: #F5F5F5;
  --border-color: #e2e8f0;
  --footer-bg: #edf2f7;
  --input-bg: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(245, 247, 250, 0.95);
  --accent-color: #4a5568;
  --accent-hover: #2d3748;
}

[data-theme="dark"] {
  --bg-color: #1a202c;
  --text-color: #e2e8f0;
  --card-bg: #2d3748;
  --border-color: #4a5568;
  --footer-bg: #2d3748;
  --input-bg: #4a5568;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(45, 55, 72, 0.95);
  --accent-color: #63b3ed;
  --accent-hover: #90cdf4;
}

/* Переключатель темы */
.theme-switcher {
    background: var(--card-bg);
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 15px;
    position: relative;
    overflow: hidden;
    width: 40px;
    height: 40px;
    min-width: auto;
}

.theme-switcher::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 0.6s;
}

.theme-switcher:hover::before {
    left: 100%;
}

.theme-switcher:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px) scale(1.1);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.theme-icon {
    font-size: 18px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.theme-switcher:hover .theme-icon {
    transform: rotate(180deg) scale(1.2);
}

.theme-text {
    display: none;
}

/* Адаптивность */
@media (max-width: 800px) {
  .center-menu {
    gap: 10px;
  }
  .ghost-btn {
    padding: 6px 10px;
    font-size: 14px;
  }
  .nav-btn {
    padding: 7px 12px;
    font-size: 14px;
  }
}