:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --card-red: #fee2e2;
    --card-red-text: #991b1b;
    --card-yellow: #fef3c7;
    --card-yellow-text: #92400e;
    --card-green: #dcfce7;
    --card-green-text: #166534;
    --card-blue: #dbeafe;
    --card-blue-text: #1e40af;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 16px;
}

/* Auth View */
.view {
    display: none;
    min-height: 100vh;
}

.view.active {
    display: flex;
}

#auth-view {
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at top left, #1e293b, #0f172a);
}

.auth-container {
    padding: 3rem;
    width: 100%;
    max-width: 400px;
}

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

.auth-logo h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    color: transparent;
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.input-group input:focus {
    border-color: var(--accent-color);
}

.btn {
    width: 100%;
    padding: 0.875rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

.btn-secondary {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Şifre alanı — içine gömülü göster/gizle düğmesi */
.password-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrap input {
    /* Düğmenin altında kalmasın diye sağdan yer bırakılıyor */
    padding-right: 2.75rem;
}

.password-toggle {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.35rem 0.5rem;
    line-height: 1;
    border-radius: 4px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.password-toggle:hover {
    opacity: 1;
}

.password-toggle:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
}

.auth-hints {
    margin-top: 2rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Dashboard View */
#dashboard-view {
    display: none;
    width: 100%;
}
#dashboard-view.active {
    display: flex;
}

.sidebar {
    width: 260px;
    /* flex-shrink olmadan, geniş tablolar (örn. Öğrenciler sayfası) yan
       taraftaki bu menüyü ezip 2px'e kadar sıkıştırıyordu: 1280px gibi
       yaygın laptop genişliklerinde menü görünmez ve tıklanamaz oluyordu. */
    flex-shrink: 0;
    margin: 1rem;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 76px;
}

.sidebar.collapsed .sidebar-header h2 {
    display: none;
}

.sidebar.collapsed .nav-text {
    display: none;
}

.sidebar.collapsed .user-info {
    display: none;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    color: transparent;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

.nav-item:hover, .nav-item.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--accent-color);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.user-info {
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.main-content {
    flex: 1;
    /* min-width:0 olmadan flex öğesi içeriğinden küçülemez; geniş tablo
       kapsayıcıyı şişirip yan menüyü iterdi. Bu kuralla tablo kendi
       alanında yatay kayar, düzen bozulmaz. */
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: 1rem 1rem 1rem 0;
}

.top-header {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.top-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.content-area {
    flex: 1;
    overflow-y: auto;
    /* Geniş tablolar sayfayı yana taşırmasın, kendi alanında kaysın. */
    overflow-x: auto;
    min-width: 0;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.module-card {
    padding: 1.5rem;
    border-radius: 12px;
    background: white;
    color: #1e293b;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.2s;
}

.module-card:hover {
    transform: translateY(-4px);
}

.module-card.bg-red { background: var(--card-red); }
.module-card.bg-red .badge { background: var(--card-red-text); color: white; }

.module-card.bg-yellow { background: var(--card-yellow); }
.module-card.bg-yellow .badge { background: var(--card-yellow-text); color: white; }

.module-card.bg-green { background: var(--card-green); }
.module-card.bg-green .badge { background: var(--card-green-text); color: white; }

.module-card.bg-blue { background: var(--card-blue); }
.module-card.bg-blue .badge { background: var(--card-blue-text); color: white; }

.module-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.badge {
    align-self: flex-start;
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: auto;
}

/* Takvim */
.calendar-container {
    padding: 1.5rem;
}

.slot-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.slot-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid var(--glass-border);
}

.slot-info h4 {
    margin-bottom: 0.25rem;
}

.slot-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.event-completed {
    opacity: 0.6 !important;
    text-decoration: line-through !important;
}

/* Modern Calendar Overrides */
.modern-calendar {
    color: var(--text-primary) !important;
    background: transparent !important;
}

.modern-calendar .fc-theme-standard td, 
.modern-calendar .fc-theme-standard th, 
.modern-calendar .fc-theme-standard .fc-scrollgrid {
    border-color: rgba(255, 255, 255, 0.1) !important;
}

.modern-calendar .fc-col-header-cell {
    background: rgba(255,255,255,0.05);
    padding: 10px 0;
}

.modern-calendar .fc-daygrid-day-number {
    color: var(--text-secondary);
    font-weight: 500;
}

.modern-calendar .fc-day-today {
    background-color: rgba(59, 130, 246, 0.1) !important;
}

.modern-calendar .fc-button-primary {
    background-color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    text-transform: capitalize;
    border-radius: 8px !important;
}

.modern-calendar .fc-button-primary:not(:disabled):active,
.modern-calendar .fc-button-primary:not(:disabled).fc-button-active {
    background-color: var(--accent-hover) !important;
    border-color: var(--accent-hover) !important;
}

.modern-calendar .fc-toolbar-title {
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    color: var(--text-primary);
}


.modern-calendar .fc-event {
    border-radius: 6px !important;
    padding: 2px 4px !important;
    border: none !important;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Students Table (Notion Style) */
.students-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.students-table th {
    padding: 12px 16px;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.students-table td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    white-space: nowrap;
}

.students-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* FM Asistan (Chatbot) */
#chatbot-widget {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.75rem;
}

#chatbot-widget.chatbot-hidden {
    display: none;
}

#chatbot-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: linear-gradient(135deg, var(--accent-color), #a78bfa);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
    transition: transform 0.2s;
}

#chatbot-toggle:hover {
    transform: scale(1.08);
}

#chatbot-panel {
    width: 380px;
    max-width: calc(100vw - 3rem);
    height: 540px;
    max-height: calc(100vh - 8rem);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

#chatbot-panel.chatbot-closed {
    display: none;
}

.chatbot-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
}

.chatbot-header h3 {
    font-size: 1rem;
}

.chatbot-header small {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

#chatbot-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.25rem;
}

#chatbot-close-btn:hover {
    color: var(--text-primary);
}

#chatbot-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chatbot-msg {
    max-width: 85%;
    padding: 0.65rem 0.9rem;
    border-radius: 12px;
    font-size: 0.875rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chatbot-msg.bot {
    align-self: flex-start;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-bottom-left-radius: 4px;
}

.chatbot-msg.user {
    align-self: flex-end;
    background: var(--accent-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.chatbot-msg.bot ul {
    margin: 0.35rem 0 0.35rem 1.1rem;
}

.chatbot-msg.bot li {
    margin-bottom: 0.25rem;
}

.chatbot-msg.bot small {
    color: var(--text-secondary);
}

.chatbot-msg.typing {
    color: var(--text-secondary);
    font-style: italic;
}

#chatbot-suggestions {
    padding: 0.5rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    border-top: 1px solid var(--glass-border);
    max-height: 108px;
    overflow-y: auto;
}

#chatbot-suggestions:empty {
    display: none;
}

.chatbot-chip {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 99px;
    padding: 0.3rem 0.75rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.chatbot-chip:hover {
    background: rgba(59, 130, 246, 0.25);
    color: var(--text-primary);
    border-color: var(--accent-color);
}

#chatbot-form {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.25);
}

#chatbot-input {
    flex: 1;
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    font-family: inherit;
}

#chatbot-input:focus {
    border-color: var(--accent-color);
}

#chatbot-send-btn {
    width: 42px;
    border: none;
    border-radius: 8px;
    background: var(--accent-color);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

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