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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: rgba(26, 26, 46, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.08);
    --accent-primary: #6c63ff;
    --accent-secondary: #00d2ff;
    --accent-gradient: linear-gradient(135deg, #6c63ff, #00d2ff);
    --accent-gradient-hover: linear-gradient(135deg, #7c74ff, #20e2ff);
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-muted: #555570;
    --border-color: rgba(255, 255, 255, 0.08);
    --msg-self: rgba(108, 99, 255, 0.15);
    --msg-other: rgba(255, 255, 255, 0.05);
    --msg-system: rgba(0, 210, 255, 0.1);
    --danger: #ff4757;
    --success: #2ed573;
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(108, 99, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 210, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(108, 99, 255, 0.04) 0%, transparent 50%);
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(108, 99, 255, 0.3);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(108, 99, 255, 0.5); }

/* ========== LOGIN PAGE ========== */
#login-page, #chat-page {
    display: none;
    width: 100%;
    height: 100vh;
}

#login-page.active {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.6s ease;
}

#chat-page.active {
    display: flex;
    height: 100vh;
    animation: slideUp 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes messagePop {
    from { opacity: 0; transform: translateY(10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ========== LOGIN FORM ========== */
.form-container {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 3rem;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.form-container .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.form-container .logo-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gradient);
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    animation: float 3s ease-in-out infinite;
    box-shadow: 0 8px 25px rgba(108, 99, 255, 0.3);
}

.form-container h2 {
    text-align: center;
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.4rem;
}

.form-container .subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.4rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    outline: none;
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.input-group input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
    background: rgba(255, 255, 255, 0.07);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108, 99, 255, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ========== CHAT LAYOUT ========== */
.chat-container {
    width: 100%;
    height: 100vh;
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: 70px 1fr 80px;
    grid-template-areas:
        "sidebar header"
        "sidebar messages"
        "sidebar input";
    background: var(--bg-primary);
}

/* ========== HEADER ========== */
.chat-header {
    grid-area: header;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header .room-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-header .room-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.chat-header .room-details h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chat-header .room-details .online-count {
    font-size: 0.8rem;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 5px;
}

.chat-header .online-count .dot {
    width: 7px;
    height: 7px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

#leave-btn {
    padding: 8px 18px;
    background: rgba(255, 71, 87, 0.1);
    color: var(--danger);
    border: 1px solid rgba(255, 71, 87, 0.2);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

#leave-btn:hover {
    background: rgba(255, 71, 87, 0.2);
    border-color: rgba(255, 71, 87, 0.4);
}

/* ========== SIDEBAR ========== */
.chat-sidebar {
    grid-area: sidebar;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.chat-sidebar .sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.chat-sidebar .sidebar-header h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.chat-sidebar .sidebar-header .count {
    background: var(--accent-gradient);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 22px;
    text-align: center;
}

#users {
    list-style: none;
    flex: 1;
}

#users li {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    margin-bottom: 4px;
    cursor: default;
}

#users li:hover {
    background: var(--bg-glass-hover);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.user-status {
    font-size: 0.75rem;
    color: var(--success);
}

/* ========== MESSAGES ========== */
.chat-messages {
    grid-area: messages;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.message {
    max-width: 65%;
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    animation: messagePop 0.3s ease;
    position: relative;
}

.message .meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    font-size: 0.75rem;
}

.message .meta .author {
    font-weight: 600;
    color: var(--accent-secondary);
}

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

.message .text {
    font-size: 0.95rem;
    line-height: 1.5;
    word-wrap: break-word;
}

/* Diğer kullanıcı mesajları */
.message.other {
    background: var(--msg-other);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
}

/* Kendi mesajlarım */
.message.self {
    background: var(--msg-self);
    border: 1px solid rgba(108, 99, 255, 0.15);
    border-bottom-right-radius: 4px;
    align-self: flex-end;
}

.message.self .meta .author {
    color: var(--accent-primary);
}

/* Sistem mesajları */
.message.system {
    background: var(--msg-system);
    border: 1px solid rgba(0, 210, 255, 0.1);
    text-align: center;
    max-width: 50%;
    align-self: center;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.message.system.join { border-left: 3px solid var(--success); }
.message.system.leave { border-left: 3px solid var(--danger); }

.message img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    margin-top: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.message img:hover {
    transform: scale(1.02);
}

/* Typing Indicator */
.typing-indicator {
    display: none;
    align-self: flex-start;
    padding: 12px 20px;
    background: var(--msg-other);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: 4px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    gap: 6px;
    align-items: center;
}

.typing-indicator.show { display: flex; }

.typing-indicator .dots {
    display: flex;
    gap: 3px;
}

.typing-indicator .dots span {
    width: 6px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite;
}

.typing-indicator .dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator .dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* ========== INPUT AREA ========== */
.chat-form-container {
    grid-area: input;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.message-tools {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.tool-btn {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 1rem;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.tool-btn:hover {
    color: var(--accent-primary);
    background: var(--bg-glass-hover);
    border-color: rgba(108, 99, 255, 0.3);
}

#chat-form {
    display: flex;
    align-items: center;
    gap: 10px;
}

#chat-form input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: var(--transition);
}

#chat-form input::placeholder { color: var(--text-muted); }

#chat-form input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

#chat-form .btn-send {
    padding: 12px 20px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

#chat-form .btn-send:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.4);
}

/* ========== EMOJI PICKER ========== */
.emoji-picker {
    display: none;
    position: absolute;
    bottom: 90px;
    left: 300px;
    z-index: 100;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.emoji-picker.show { display: block; }

emoji-picker {
    --emoji-size: 1.3rem;
    --background: var(--bg-secondary);
    --border-color: var(--border-color);
    --input-border-color: var(--border-color);
    --input-font-color: var(--text-primary);
    --category-font-color: var(--text-secondary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .chat-container {
        grid-template-columns: 1fr;
        grid-template-rows: 60px 1fr 70px;
        grid-template-areas:
            "header"
            "messages"
            "input";
    }

    .chat-sidebar { display: none; }

    .chat-header { padding: 0 1rem; }

    .chat-messages { padding: 1rem; }

    .message { max-width: 85%; }
    .message.system { max-width: 70%; }

    .chat-form-container { padding: 0.75rem 1rem; }

    .emoji-picker { left: 10px; bottom: 80px; }

    .form-container {
        margin: 1rem;
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .form-container { padding: 1.5rem; }
    .message { max-width: 90%; }
    #leave-btn { padding: 6px 12px; font-size: 0.8rem; }
}