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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-input: #0f0f1a;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent: #0f9d58;
    --accent-hover: #0b7a45;
    --border: #2a2a4a;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

#app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Auth screens */
.auth-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 20px;
}

.auth-container h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.auth-container p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.auth-container form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 300px;
}

.auth-container input {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 1rem;
}

.auth-container input:focus {
    outline: none;
    border-color: var(--accent);
}

.auth-container button {
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.auth-container button:hover {
    background: var(--accent-hover);
}

.error {
    color: #e74c3c;
    font-size: 0.9rem;
    min-height: 1.2em;
}

/* Chat layout */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.chat-header h1 {
    font-size: 1.25rem;
}

.current-user {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    max-width: 70%;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-radius: 12px;
    align-self: flex-start;
}

.message.own {
    align-self: flex-end;
    background: var(--accent);
}

.message-header {
    display: flex;
    gap: 10px;
    margin-bottom: 4px;
    font-size: 0.8rem;
}

.message-author {
    font-weight: 600;
}

.message-time {
    color: var(--text-secondary);
}

.message.own .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.message-text {
    word-wrap: break-word;
    line-height: 1.4;
}

.message-image {
    max-width: 300px;
    max-height: 300px;
    border-radius: 8px;
    margin-top: 8px;
    cursor: pointer;
}

/* Input area */
.input-container {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.input-container input[type="text"] {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 1rem;
}

.input-container input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
}

.icon-btn:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.send-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

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

/* Emoji picker */
.emoji-picker {
    position: fixed;
    bottom: 70px;
    right: 70px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    max-width: 320px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.emoji-picker.hidden {
    display: none;
}

.emoji-item {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    font-size: 1.4rem;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
}

.emoji-item:hover {
    background: var(--bg-input);
}