/* app.css — Component Styles for EdPort Chat-First Experience */

/* ─── App Shell ─── */
.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* ─── Header ─── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-6);
  height: 56px;
  background: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-smooth), background var(--transition-smooth);
}

.header.has-border {
  border-bottom-color: var(--color-border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Header Buttons */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.btn-icon:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

.btn-new-chat {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  transition: all var(--transition-interactive);
}

.btn-new-chat:hover {
  color: var(--color-text);
  background: var(--color-surface);
  border-color: var(--color-text-muted);
}

.btn-new-chat svg {
  width: 14px;
  height: 14px;
}

.app.chat-active .btn-new-chat {
  display: flex;
}

/* ─── Landing View ─── */
.landing {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 56px var(--space-6) var(--space-16);
  min-height: 100dvh;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.landing.hidden {
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
  position: absolute;
  inset: 0;
}

.landing-content {
  width: 100%;
  max-width: var(--content-default);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Landing Logo Mark */
.landing-logo {
  margin-bottom: var(--space-8);
  opacity: 0.12;
}

.landing-logo svg {
  width: 48px;
  height: 48px;
}

/* Greeting */
.greeting {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-10);
  line-height: 1.1;
}

/* ─── Chat Input Bar ─── */
.input-area {
  width: 100%;
  max-width: var(--content-default);
  position: relative;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: flex-end;
  background: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-input);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
  padding: var(--space-1);
}

.input-wrapper:focus-within {
  border-color: var(--color-input-focus);
  box-shadow: var(--shadow-input-focus);
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  resize: none;
  min-height: 48px;
  max-height: 160px;
  overflow-y: auto;
  outline: none;
}

.chat-input::placeholder {
  color: var(--color-text-faint);
}

.btn-send {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: var(--space-1);
  border-radius: var(--radius-xl);
  background: var(--color-accent);
  color: var(--color-accent-text);
  flex-shrink: 0;
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              opacity var(--transition-interactive);
  opacity: 0.3;
}

.btn-send.active {
  opacity: 1;
}

.btn-send.active:hover {
  background: var(--color-accent-hover);
  transform: scale(1.05);
}

.btn-send svg {
  width: 18px;
  height: 18px;
}

/* ─── Suggestion Chips ─── */
.suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding: 0 var(--space-4);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--color-chip-bg);
  border: 1px solid var(--color-chip-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-interactive);
  white-space: nowrap;
}

.chip:hover {
  background: var(--color-chip-hover);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* ─── Login Row ─── */
.login-row {
  width: 100%;
  max-width: var(--content-default);
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-3);
  padding: 0 var(--space-1);
}

/* ─── Login Button ─── */
.btn-login {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: #2563eb;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: #ffffff;
  cursor: pointer;
  transition: all var(--transition-interactive);
}

.btn-login:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

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

.btn-login svg {
  flex-shrink: 0;
}

/* ─── Chat View ─── */
.chat-view {
  flex: 1;
  display: none;
  flex-direction: column;
  padding-top: 56px;
  min-height: 100dvh;
}

.app.chat-active .chat-view {
  display: flex;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6) var(--space-4);
  padding-bottom: var(--space-32);
  scroll-behavior: smooth;
}

.chat-messages-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ─── Message Bubbles ─── */
.message {
  display: flex;
  gap: var(--space-3);
  max-width: 85%;
  animation: messageIn 400ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-ai {
  align-self: flex-start;
}

.message-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: var(--space-1);
}

.message-ai .message-avatar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.message-ai .message-avatar svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
}

.message-user .message-avatar {
  display: none;
}

.message-bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message-user .message-bubble {
  background: var(--color-bubble-user);
  color: var(--color-text);
  border-bottom-right-radius: var(--radius-sm);
}

.message-ai .message-bubble {
  background: var(--color-bubble-ai);
  color: var(--color-text);
  border: 1px solid var(--color-bubble-ai-border);
  border-bottom-left-radius: var(--radius-sm);
}

.message-ai .message-bubble p {
  margin-bottom: var(--space-3);
}

.message-ai .message-bubble p:last-child {
  margin-bottom: 0;
}

/* ─── Typing Indicator ─── */
.typing-indicator {
  display: flex;
  gap: var(--space-3);
  align-self: flex-start;
  max-width: 85%;
  animation: messageIn 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.typing-dots {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bubble-ai);
  border: 1px solid var(--color-bubble-ai-border);
  border-radius: var(--radius-xl);
  border-bottom-left-radius: var(--radius-sm);
}

.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-faint);
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

/* ─── Chat Fixed Input ─── */
.chat-input-fixed {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: var(--space-3) var(--space-4) var(--space-4);
  background: linear-gradient(to top, var(--color-bg) 80%, transparent);
}

.chat-input-fixed .input-area {
  margin: 0 auto;
}

/* ─── Login Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--color-modal-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.modal-overlay.visible {
  display: flex;
  opacity: 1;
}

.modal {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  width: 100%;
  max-width: 420px;
  margin: var(--space-4);
  box-shadow: var(--shadow-lg);
  transform: translateY(16px);
  transition: transform var(--transition-smooth);
}

.modal-overlay.visible .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.modal-close:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.modal h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.modal p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.5;
}

.modal-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-text);
  outline: none;
  margin-bottom: var(--space-4);
  transition: border-color var(--transition-interactive);
}

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

.modal-input::placeholder {
  color: var(--color-text-faint);
}

.btn-primary {
  width: 100%;
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-accent-text);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

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

/* Modal success state */
.modal-success {
  display: none;
  text-align: center;
  padding: var(--space-4) 0;
}

.modal-success.visible {
  display: block;
}

.modal-success-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-success-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-text);
}

.modal-form.hidden {
  display: none;
}

/* Remember me checkbox */
.remember-me {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  user-select: none;
}

.remember-me input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: #2563eb;
  cursor: pointer;
  margin: 0;
}

/* Modal error state */
.modal-error {
  display: none;
  text-align: center;
  padding: var(--space-4) 0;
}

.modal-error.visible {
  display: block;
}

.modal-error p {
  color: #dc2626;
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

/* ─── Workspace Button (header) ─── */
.btn-workspace {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent-text);
  background: var(--color-accent);
  border: none;
  transition: all var(--transition-interactive);
}

.btn-workspace:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-workspace svg {
  width: 16px;
  height: 16px;
}

.btn-workspace.visible {
  display: flex;
}

/* Logout button */
.btn-logout {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  transition: all var(--transition-interactive);
}

.btn-logout:hover {
  color: #dc2626;
  background: var(--color-surface);
}

.btn-logout.visible {
  display: flex;
}

/* ─── Workspace Panel ─── */
.workspace-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  background: var(--color-modal-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.workspace-overlay.visible {
  display: block;
  opacity: 1;
}

.workspace-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 440px;
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  z-index: 301;
}

.workspace-overlay.visible .workspace-panel {
  transform: translateX(0);
}

.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.workspace-header h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.workspace-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.workspace-student {
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  display: none;
}

.workspace-student.visible {
  display: block;
}

.workspace-student-name {
  font-weight: 600;
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.workspace-student-email {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.workspace-section {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.workspace-section-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.workspace-section-header svg {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.workspace-section-header h3 {
  font-size: var(--text-sm);
  font-weight: 600;
}

.workspace-placeholder {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .workspace-panel {
    max-width: 100%;
  }

  .btn-workspace span {
    display: none;
  }

  .btn-workspace {
    padding: var(--space-2);
    border-radius: var(--radius-md);
  }
}

/* ─── Footer ─── */
.footer {
  padding: var(--space-4) var(--space-6);
  text-align: center;
}

.footer a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer a:hover {
  color: var(--color-text-muted);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .header {
    padding: var(--space-3) var(--space-4);
  }

  .greeting {
    font-size: clamp(1.5rem, 1rem + 3vw, 2.25rem);
    margin-bottom: var(--space-8);
  }

  .landing {
    padding: 56px var(--space-4) var(--space-12);
  }

  .input-wrapper {
    border-radius: var(--radius-xl);
  }

  .suggestions {
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }

  .chip {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-3);
  }

  .message {
    max-width: 92%;
  }

  .chat-messages {
    padding: var(--space-4) var(--space-3);
    padding-bottom: var(--space-24);
  }

  .chat-input-fixed {
    padding: var(--space-2) var(--space-3) var(--space-3);
  }

  .modal {
    margin: var(--space-3);
    padding: var(--space-6);
  }

  .btn-new-chat span {
    display: none;
  }

  .btn-new-chat {
    padding: var(--space-2);
    border: none;
  }
}

@media (max-width: 480px) {
  .suggestions {
    flex-direction: column;
    align-items: stretch;
  }

  .chip {
    justify-content: center;
    white-space: normal;
    text-align: center;
  }
}

/* ─── Scrollbar ─── */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-faint);
}

/* ─── Utilities ─── */
.fade-in {
  animation: fadeIn 400ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}