@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;600;700&family=DM+Sans:wght@300;400;500;600&display=swap');

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

:root {
  --bg:        #f5f0e8;
  --card:      #ffffff;
  --ink:       #1a1a2e;
  --ink-soft:  #4a4a6a;
  --ink-muted: #9090b0;
  --accent:    #2d5be3;
  --accent-lt: #edf0fd;
  --accent-glow: rgba(45, 91, 227, 0.18);
  --gold:      #c9973a;
  --border:    rgba(26, 26, 46, 0.09);
  --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
  --shadow-md: 0 8px 32px rgba(26,26,46,0.10);
  --shadow-lg: 0 24px 60px rgba(26,26,46,0.13);
  --radius:    20px;
  --radius-sm: 12px;
  --font-head: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── BODY & BACKGROUND ── */
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% -10%, rgba(45,91,227,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 110%, rgba(201,151,58,0.08) 0%, transparent 55%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  gap: 0;
}

/* ── CONTAINER (heading block) ── */
.container {
  width: 100%;
  max-width: 460px;
  text-align: center;
  margin-bottom: 0;
  animation: riseIn 0.55s ease both;
}

.container h1 {
  font-family: var(--font-head);
  font-size: 2.05rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.15;
  position: relative;
  display: inline-block;
}

/* decorative underline accent on h1 */
.container h1::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: 2px;
  margin: 0.45rem auto 0;
  transition: width var(--transition);
}
.container h1:hover::after {
  width: 90px;
}

/* ── CARD WRAPPER — wraps amount + dropdown + message + button ── */
/* We'll use a clever CSS trick: target the siblings after .container */
body > .amount,
body > .dropdown,
body > .message,
body > .btn {
  width: 100%;
  max-width: 460px;
}

/* Visually group everything into one card using a pseudo-card approach */
body > .amount {
  background: var(--card);
  border-radius: var(--radius) var(--radius) 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  padding: 2rem 2rem 1.4rem;
  margin-top: 1.8rem;
  box-shadow: var(--shadow-md);
  animation: riseIn 0.55s 0.08s ease both;
}

body > .dropdown {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 1px solid rgba(26,26,46,0.05);
  border-bottom: none;
  padding: 0 2rem 1.4rem;
  box-shadow: 0 0 0 rgba(0,0,0,0);
  animation: riseIn 0.55s 0.14s ease both;
}

body > .message {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 1px solid rgba(26,26,46,0.05);
  border-bottom: none;
  padding: 0.9rem 2rem;
  animation: riseIn 0.55s 0.2s ease both;
}

body > .btn {
  border-radius: 0 0 var(--radius) var(--radius);
  /* button styles below */
}

/* ── AMOUNT SECTION ── */
.amount p {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin-bottom: 0.65rem;
}

.amount input {
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  font-family: var(--font-body);
  font-size: 1.45rem;
  font-weight: 500;
  color: var(--ink);
  outline: none;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
  letter-spacing: -0.01em;
}

.amount input::placeholder {
  color: var(--ink-muted);
  font-weight: 300;
  font-size: 1.2rem;
}

.amount input:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px var(--accent-glow);
}

/* ── DROPDOWN SECTION ── */
.dropdown {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

/* swap icon */
.dropdown .fa-solid {
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
  background: var(--accent-lt);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition);
  cursor: pointer;
  border: 1px solid rgba(45,91,227,0.15);
}

.dropdown .fa-solid:hover {
  transform: rotate(180deg);
  background: var(--accent);
  color: #fff;
}

/* Currency blocks */
.fromCurrency,
.toCurrency {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.fromCurrency:focus-within,
.toCurrency:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

/* Flag image */
.fromCurrency img,
.toCurrency img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid rgba(255,255,255,0.9);
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}

/* Select */
.fromCurrency select,
.toCurrency select {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  outline: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239090b0' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0px center;
  padding-right: 16px;
  letter-spacing: 0.03em;
}

.fromCurrency select:focus,
.toCurrency select:focus {
  color: var(--accent);
}

/* ── MESSAGE ── */
.message {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-align: center;
  letter-spacing: 0.02em;
  position: relative;
}

/* subtle separator lines on message */
.message::before,
.message::after {
  content: '—';
  margin: 0 0.5rem;
  color: var(--ink-muted);
  font-weight: 300;
}

/* ── EXCHANGE BUTTON ── */
.btn {
  display: block;
  width: 100%;
  max-width: 460px;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--accent) 0%, #1a40b8 100%);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: 0 0 var(--radius) var(--radius);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    opacity var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
  box-shadow: var(--shadow-md), 0 4px 20px rgba(45,91,227,0.3);
  animation: riseIn 0.55s 0.26s ease both;
}

/* shimmer sweep on button */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    transparent 30%,
    rgba(255,255,255,0.18) 50%,
    transparent 70%
  );
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn:hover {
  opacity: 0.93;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 8px 30px rgba(45,91,227,0.4);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ── ANIMATIONS ── */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── RESPONSIVE ── */
@media (max-width: 520px) {
  .container h1 { font-size: 1.6rem; }
  body > .amount { padding: 1.5rem 1.3rem 1.1rem; }
  body > .dropdown { padding: 0 1.3rem 1.2rem; gap: 0.55rem; }
  body > .message  { padding: 0.8rem 1.3rem; }
  .btn { padding: 0.9rem 1.3rem; }
}