@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@400;500;700&family=Plus+Jakarta+Sans:wght@400;600;800&display=swap');

:root {
    --primary: #6366f1;
    --primary-light: #a5b4fc;
    --primary-dark: #4338ca;
    --accent: #10b981;
    --bg: #030712;
    --surface: rgba(17, 24, 39, 0.7);
    --surface-bright: rgba(31, 41, 55, 0.8);
    --border: rgba(255, 255, 255, 0.08);
    --text: #f9fafb;
    --text-dim: #9ca3af;
    --warning: #f59e0b;
    --error: #ef4444;
    --glass-blur: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Tajawal', 'Plus Jakarta Sans', sans-serif;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background: radial-gradient(circle at top right, #1e1b4b, #030712);
    color: var(--text);
    direction: rtl;
    height: 100vh;
    overflow: hidden;
}

/* --- Premium Glass Header --- */
.glass-header {
    height: 80px;
    background: rgba(3, 7, 18, 0.4);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-left h1 {
    font-family: 'Plus Jakarta Sans', 'Tajawal', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #fff 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-left h1 span {
    background: var(--primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Header Controls --- */
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pill {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: 0.3s;
}

.pill:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
}

.pill.warning {
    color: var(--warning);
    border-color: rgba(245, 158, 11, 0.2);
}

.pill.primary {
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.1);
}

/* --- Auth Button --- */
.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    filter: brightness(1.1);
}

/* --- Redesigned Auth Modal --- */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.modal-content {
    width: 100%;
    max-width: 440px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 32px;
    padding: 40px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.modal-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.03);
    padding: 4px;
    border-radius: 16px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    font-weight: 700;
    cursor: pointer;
    border-radius: 12px;
    transition: 0.3s;
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-wrapper {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    transition: 0.3s;
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.input-wrapper i {
    color: var(--text-dim);
    font-size: 1.1rem;
}

.input-wrapper input {
    background: transparent;
    border: none;
    color: white;
    padding: 16px 12px;
    width: 100%;
    font-size: 1rem;
}

.close-modal-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

.close-modal-btn:hover {
    background: var(--error);
    color: white;
    transform: rotate(90deg);
}

/* --- Layout --- */
#app-wrapper {
    display: flex;
    height: 100vh;
}

#main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    width: 100%;
}

/* --- Chat Elements --- */
#chat-viewport {
    flex: 1;
    overflow-y: auto;
    padding: 24px 16px;
    scroll-behavior: smooth;
}

#chat-messages {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    max-width: 80%;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.bot-msg { align-self: flex-start; }
.user-msg { align-self: flex-end; }

.msg-bubble {
    padding: 16px 24px;
    border-radius: 24px;
    line-height: 1.6;
    font-size: 1.05rem;
    position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.bot-msg .msg-bubble {
    background: var(--surface-bright);
    border: 1px solid var(--border);
    border-bottom-right-radius: 6px;
}

.user-msg .msg-bubble {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-bottom-left-radius: 6px;
}

.msg-footer {
    margin-top: 6px;
    display: flex;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--text-dim);
    padding: 0 8px;
}

.user-msg .msg-footer { justify-content: flex-end; }

/* --- Input Area --- */
.input-area {
    padding: 24px;
    background: linear-gradient(to top, var(--bg) 60%, transparent);
}

.glass-form {
    max-width: 900px;
    margin: 0 auto;
    background: rgba(31, 41, 55, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 24px;
    display: flex;
    padding: 8px;
    transition: 0.3s;
}

.input-container {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-left: 10px;
}

.tier-select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 8px 12px;
    border-radius: 14px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: 0.3s;
    min-width: 140px;
}

.tier-select:focus {
    border-color: var(--primary);
    color: var(--text);
    background: rgba(99, 102, 241, 0.1);
}

.tier-select option {
    background: #111827;
    color: var(--text);
}

#user-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    padding: 12px 10px;
    font-size: 1.1rem;
}

#send-btn {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    background: var(--primary);
    border: none;
    color: white;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

#send-btn:hover {
    transform: scale(1.05) rotate(-10deg);
}

/* --- Mobile Fixes --- */
@media (max-width: 768px) {
    .desktop-only { display: none !important; }
    .glass-header { height: 70px; padding: 0 16px; }
    .header-left h1 { font-size: 1.2rem; }
    .msg-bubble { font-size: 1rem; padding: 14px 20px; }
    .modal-content { padding: 30px 20px; }
}

.hidden { display: none !important; }

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 10px;
    border-radius: 14px;
    transition: 0.3s;
}

.icon-btn:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

#sidebar {
    width: 320px;
    background: rgba(11, 17, 30, 0.95);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    position: fixed;
    right: 0;
    height: 100%;
    z-index: 2000;
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#sidebar.sidebar-closed {
    transform: translateX(100%);
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
}

.history-item {
    padding: 16px 24px;
    cursor: pointer;
    transition: 0.2s;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-dim);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
}

.generating-status {
    font-size: 0.9rem;
    color: var(--primary-light);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 16px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    position: relative;
    margin-bottom: 12px;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

.step-item {
    font-size: 0.85rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 12px;
}

.step-item.completed { color: var(--accent); }