/* ==============================
   MODERN ELEGANT DESIGN
   Palette: Gold (#CDA34F), White, Black
   Fonts: Playfair Display (headings) & Open Sans (body)
   Subtle shadows & refined spacing
   ============================== */

/* Import fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Open+Sans:wght@300;400;600&display=swap');

:root {
  --color-gold: #CDA34F;
  --color-white: #FFFFFF;
  --color-black: #222222;
  --color-gray-light: #F5F5F5;
}

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

html, body {
  height: 100%;
  background-color: var(--color-white);
  color: var(--color-black);
  font-family: 'Open Sans', sans-serif;
  line-height: 1.6;
}
a {
  color: var(--color-black);
  text-decoration: none;
  transition: color 0.3s;
}
a:hover {
  color: var(--color-gold);
}

/* ==============================
   NAVIGATION
   ============================== */
.main-nav {
  background-color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.nav-brand {
  display: flex;
  align-items: center;
}
.nav-logo {
  height: 50px;
  margin-right: 1rem;
}
.nav-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  color: var(--color-gold);
}
.nav-links {
  display: flex;
  gap: 1rem;
}
.nav-links a {
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  border-radius: 5px;
}
.nav-links a:hover {
  background-color: var(--color-gold);
  color: var(--color-white);
}

/* ==============================
   MAIN CONTENT
   ============================== */
.main-content {
  max-width: 1024px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* ==============================
   CARDS & FRAMES
   ============================== */
.card, .concert-card {
  background-color: var(--color-gray-light);
  border: 1px solid var(--color-gold);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.concert-card {
  transition: transform 0.2s;
}
.concert-card:hover {
  transform: translateY(-4px);
}
.card h2, .concert-card h3 {
  font-family: 'Playfair Display', serif;
  color: var(--color-black);
  margin-bottom: 0.75rem;
}

/* ==============================
   FORMS
   ============================== */
.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-black);
  border-radius: 4px;
  background-color: var(--color-white);
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 6px rgba(205,163,79,0.4);
}

/* ==============================
   BUTTONS
   ============================== */
.btn-save, .btn-add {
  background-color: var(--color-gold);
  color: var(--color-white);
}
.btn-cancel {
  background-color: var(--color-black);
  color: var(--color-white);
}
.btn-save, .btn-cancel, .btn-add {
  border: none;
  padding: 0.8rem 1.6rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.3s, transform 0.2s;
}
.btn-save:hover, .btn-add:hover {
  transform: scale(1.03);
}
.btn-save:hover {
  background-color: #b5923f;
}
.btn-cancel:hover {
  background-color: #111111;
}

/* ==============================
   FLASH MESSAGES
   ============================== */
.flashes {
  margin-bottom: 1.5rem;
}
.flash {
  padding: 1rem;
  border-radius: 4px;
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.flash-success {
  background-color: #eafae4;
  border-left: 4px solid #28a745;
}
.flash-danger {
  background-color: #fdecea;
  border-left: 4px solid #dc3545;
}

/* ==============================
   FOOTER
   ============================== */
.main-footer {
  text-align: center;
  padding: 1rem;
  background-color: var(--color-black);
  color: var(--color-gold);
  font-size: 0.9rem;
  margin-top: 3rem;
}
.concerts-list {
  display: flex;
  flex-direction: column;
  gap: 1rem; /* medzera medzi položkami */
}
.concert-item {
  padding: 1rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
}
/* Menu položky – biela farba textu, pri hover čierna */
.nav-links a {
  color: #FFFFFF;        /* výchozí bílá */
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #000000;        /* při najetí myší černá */
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  /* Zmenšíme padding v hlavičke a menu */
  .main-nav {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
  }
  .nav-title {
    font-size: 1.5rem;
  }

  /* Content */
  .main-content {
    margin: 1rem auto;
    padding: 0 0.5rem;
  }

  /* Concert cards single column */
  .concerts-container, .concerts-list {
    display: block;
  }
  .concert-card {
    margin-bottom: 1.5rem;
    padding: 1rem;
  }

  /* Expenses grid -> single column */
  .concert-expenses-grid {
    grid-template-columns: 1fr !important;
  }
  .expense-card {
    padding: 0.75rem;
  }

  /* Tables scrollable */
  .concerts-table table {
    display: block;
    width: 100%;
    overflow-x: auto;
  }

  /* Forms full width inputs */
  .add-expense-form,
  .settings-form {
    flex-direction: column;
  }
  .add-expense-form input,
  .settings-form input,
  .settings-form select,
  .settings-form textarea {
    width: 100%;
    margin-bottom: 0.5rem;
  }
}

@media (max-width: 480px) {
  /* ešte menšie výrazy */
  .nav-title {
    font-size: 1.3rem;
  }
  .btn-save, .btn-add, .btn-cancel {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
  h1, .concert-name {
    font-size: 1.4rem;
  }
  h2, .concert-location {
    font-size: 1.1rem;
  }
  .filter-bar label, .filter-group label {
    display: block;
    margin-bottom: 0.25rem;
  }
  .filter-bar select, .filter-group select {
    width: 100%;
  }
}