:root {
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --danger-red: #ef4444;
    --header-bg: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.dark-theme {
    --bg-color: #050505;
    --card-bg: #0f0f0f;
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --border-color: #262626;
    --header-bg: #050505;
    --shadow: 0 20px 50px rgba(0,0,0,0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    transition: background-color 0.3s ease;
    min-height: 100vh;
}

#app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background-color: var(--header-bg);
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-wallet { background-color: var(--card-bg); }
.badge-balance { 
    background-color: rgba(239, 68, 68, 0.1); 
    border-color: rgba(239, 68, 68, 0.2);
}
.balance-text { color: var(--danger-red); }
.uppercase-label { letter-spacing: 0.05em; color: var(--text-muted); }

/* Buttons & Controls */
.btn-icon, .btn-lang {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-lang { padding: 0.5rem 0.75rem; gap: 0.5rem; }
.btn-icon:hover, .btn-lang:hover { background-color: var(--border-color); }

/* Icons */
.icon-xs { width: 14px; height: 14px; }
.icon-sm { width: 18px; height: 18px; }
.icon-md { width: 20px; height: 20px; }
.icon-xl { width: 32px; height: 32px; }
.hidden { display: none; }

/* Main Content */
.content-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.card {
    width: 100%;
    max-width: 500px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.icon-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.wallet-icon-bg {
    background-color: var(--danger-red);
    padding: 1.25rem;
    border-radius: 1.25rem;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

h1 { font-size: 2rem; margin-bottom: 0.75rem; font-weight: 700; }
p { font-size: 1rem; color: var(--text-muted); margin-bottom: 2.5rem; line-height: 1.5; }

.btn-primary {
    width: 100%;
    background-color: var(--accent-blue);
    color: white;
    border: none;
    padding: 1.25rem;
    border-radius: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    cursor: pointer;
    margin-bottom: 1rem;
    transition: background 0.2s;
}

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

.wallet-list-text {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    margin-bottom: 2rem;
}

.separator {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.line { flex: 1; height: 1px; background-color: var(--border-color); }
.separator span { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

.btn-secondary {
    width: 100%;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 1.25rem;
    border-radius: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    cursor: pointer;
}

.btn-secondary:hover { background-color: var(--border-color); }

.tronlink-logo {
    width: 24px;
    height: 24px;
    background: #000;
    color: #fff;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}

/* Dropdown */
.dropdown { position: relative; display: inline-block; }
.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    margin-top: 0.5rem;
    min-width: 140px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    z-index: 100;
    overflow: hidden;
}

.dropdown-content.show { display: block; }
.lang-option {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lang-option:hover { background-color: var(--border-color); }

@media (max-width: 480px) {
    .card { padding: 2rem 1.25rem; }
    h1 { font-size: 1.5rem; }
}