/* =========================================
   1. Variáveis e Cores (Design System)
   ========================================= */
:root {
    --color-bg-body: #0F172A;
    --color-bg-card: #1E293B;
    --color-bg-input: #0F172A;
    --color-primary: #10B981;
    --color-primary-hover: #059669;
    --color-secondary: #3B82F6;
    --color-danger: #EF4444;
    --color-text-main: #F1F5F9;
    --color-text-muted: #94A3B8;
    --border-color: #334155;
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-body);
    color: var(--color-text-main);
    line-height: 1.5;
    min-height: 100vh;
    padding: 16px;
}

.container {
    max-width: 500px; /* Otimizado para Mobile */
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 24px;
    padding-top: 10px;
}

header h1 {
    font-size: 2rem;
    color: var(--color-primary);
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Cards */
.card {
    background: var(--color-bg-card);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--color-text-main);
}

/* Forms e Inputs */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

input {
    width: 100%;
    background-color: var(--color-bg-input);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    color: white;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Botões Estilo Mobile (Touch Friendly) */
.btn {
    display: block;
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    text-align: center;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #000;
}

.btn-secondary {
    background-color: var(--color-bg-card);
    border: 1px solid var(--border-color);
    color: var(--color-text-main);
}

.btn-warning {
    background-color: #F59E0B;
    color: #000;
}

/* Alertas */
.alert {
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.alert-error { background: rgba(239, 68, 68, 0.1); color: var(--color-danger); border: 1px solid var(--color-danger); }

/* Room Layout */
.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-bg-card);
    padding: 16px;
    border-radius: 16px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.room-code strong {
    background: var(--color-primary);
    color: #000;
    padding: 4px 8px;
    border-radius: 6px;
    font-family: monospace;
}

/* Players List */
.players-list ul { list-style: none; }
.players-list li {
    background: rgba(255,255,255,0.05);
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
}

/* Word Card */
.word-card {
    background: var(--color-secondary);
    color: white;
    padding: 30px 20px;
    border-radius: 20px;
    text-align: center;
    margin-bottom: 24px;
}

.word { font-size: 2.5rem; font-weight: 800; display: block; margin-top: 10px; }

/* Voting List */
.voting-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.vote-button {
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    padding: 14px;
    border-radius: 12px;
    color: white;
    font-weight: 600;
}

.vote-button.voted { border-color: var(--color-primary); background: rgba(16, 185, 129, 0.1); }

/* Status de Conexão */
.connection-status {
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(4px);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 10px;
    color: var(--color-text-muted);
}

/* Botão de votação base */
.vote-button {
    background: var(--color-bg-card);
    border: 2px solid var(--border-color);
    padding: 16px;
    border-radius: 12px;
    color: var(--color-text-main);
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

/* Estado: Quando este foi o botão clicado */
.vote-button.voted {
    background: rgba(16, 185, 129, 0.2); /* Tom de sucesso/esmeralda suave */
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: scale(0.95);
}

/* Estado: Desabilitado (após votar em alguém) */
.vote-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

/* Efeito de clique ativo para feedback tátil no mobile */
.vote-button:active:not(:disabled) {
    background: var(--border-color);
    transform: translateY(2px);
}