/* ============================================
   MOBILE LAYOUT — Ask Richard Polk AI
   "One page, two layouts"
   
   This file contains ALL mobile-specific styles.
   Desktop styles live in styles.css (no mobile overrides there).
   Breakpoints:
     768px  = tablet / large phone
     480px  = phone
     380px  = small phone
   ============================================ */

/* ============================================
   1. TABLET & LARGE PHONE (≤ 768px)
   ============================================ */

@media (max-width: 768px) {

    /* --- Spacing Overrides --- */
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 1.5rem;
        --space-3xl: 2rem;
    }

    /* --- Container iOS fix --- */
    .container {
        padding: 3.5rem 0 5rem;
        padding-bottom: calc(5rem + env(safe-area-inset-bottom, 0px));
    }

    /* --- Hero: vertically center between pills and input --- */
    .centered-content {
        margin-top: auto;
        margin-bottom: auto;
        transform: none;
        padding-top: 0;
    }

    /* --- Chatting Mode: push below pills --- */
    .container.chatting .centered-content {
        margin-top: 0;
        margin-bottom: 0;
        transform: none;
        padding: 4.5rem var(--space-md) var(--space-sm);
    }

    .header {
        padding-top: var(--space-sm);
        margin-bottom: var(--space-sm);
    }

    .title-image {
        max-width: 260px;
    }

    .container.chatting .title-image {
        max-width: 180px;
    }

    .avatar-container {
        margin-bottom: var(--space-md);
    }

    .container.chatting .avatar-container {
        margin-bottom: var(--space-xs);
    }

    .container.chatting .avatar {
        width: 50px;
        height: 50px;
    }

    /* --- Messages --- */
    .messages {
        padding: 200px var(--space-md) 100px var(--space-md);
        mask-image: linear-gradient(to bottom,
                transparent 0px,
                transparent 170px,
                black 210px,
                black calc(100% - 100px),
                transparent calc(100% - 40px),
                transparent 100%);
        -webkit-mask-image: linear-gradient(to bottom,
                transparent 0px,
                transparent 170px,
                black 210px,
                black calc(100% - 100px),
                transparent calc(100% - 40px),
                transparent 100%);
    }

    .message {
        max-width: 92%;
        padding: var(--space-sm) var(--space-md);
        font-size: 0.77rem;
    }

    /* --- Input Area --- */
    .input-area {
        bottom: var(--space-md);
        bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
        width: calc(100% - var(--space-md) * 2);
    }

    .input-pill {
        padding: var(--space-sm) var(--space-md) !important;
        border-radius: 24px !important;
    }

    .message-input {
        font-size: 16px !important;
        /* Must be ≥16px to prevent iOS auto-zoom on focus */
        min-height: 20px !important;
    }

    .send-button {
        width: 34px;
        height: 34px;
    }

    /* --- Typing Indicator --- */
    .typing-indicator {
        bottom: calc(var(--space-md) + 70px);
    }

    /* --- Zoom Controls: HIDDEN on mobile --- */
    .zoom-controls {
        display: none !important;
    }

    /* --- User Greeting --- */
    .user-greeting {
        top: 0.65rem;
        right: 0.75rem;
        padding: 0.35rem 0.65rem;
        gap: 0.4rem;
    }

    .user-greeting-text {
        font-size: 0.72rem;
    }

    .sign-out-btn {
        width: 24px;
        height: 24px;
    }

    .sign-out-btn svg {
        width: 13px;
        height: 13px;
    }

    /* --- Top Left Actions (Feedback + Share Chat) --- */
    .top-left-actions {
        top: 0.65rem;
        left: 0.75rem;
        flex-direction: row !important;
        gap: 0.35rem;
    }

    .feedback-btn {
        padding: 0.35rem 0.65rem;
        font-size: 0.72rem;
        gap: 0.35rem;
    }

    .feedback-btn svg {
        width: 12px;
        height: 12px;
    }

    .share-chat-btn {
        padding: 0.35rem 0.65rem;
        font-size: 0.72rem;
        gap: 0.35rem;
    }

    .share-chat-btn svg {
        width: 12px;
        height: 12px;
    }

    /* --- Message Action Buttons --- */
    .msg-actions {
        gap: 1px;
        margin-top: 0.4rem;
        padding-top: 0.35rem;
    }

    .msg-action-btn {
        padding: 3px 7px;
        font-size: 0.65rem;
        gap: 3px;
    }

    .msg-action-icon svg {
        width: 12px;
        height: 12px;
    }

    /* --- Intro Text --- */
    .intro-text {
        font-size: 0.88rem;
        padding: 0 var(--space-md);
    }
}


/* ============================================
   2. PHONE (≤ 480px)
   ============================================ */

@media (max-width: 480px) {

    /* --- Container --- */
    .container {
        padding: 3rem 0 4.5rem;
        padding-bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px));
    }

    /* --- Chatting Mode --- */
    .container.chatting .centered-content {
        padding: 4rem var(--space-sm) 0;
    }

    .title-image {
        max-width: 220px;
    }

    .container.chatting .title-image {
        max-width: 150px;
    }

    .container.chatting .avatar {
        width: 40px;
        height: 40px;
    }

    .container.chatting .header {
        margin-bottom: var(--space-xs);
    }

    /* --- Messages --- */
    .messages {
        padding: 180px var(--space-sm) 90px var(--space-sm);
        mask-image: linear-gradient(to bottom,
                transparent 0px,
                transparent 150px,
                black 190px,
                black calc(100% - 90px),
                transparent calc(100% - 35px),
                transparent 100%);
        -webkit-mask-image: linear-gradient(to bottom,
                transparent 0px,
                transparent 150px,
                black 190px,
                black calc(100% - 90px),
                transparent calc(100% - 35px),
                transparent 100%);
    }

    .message {
        max-width: 95%;
        padding: var(--space-sm) var(--space-md);
        font-size: 0.72rem;
        border-radius: 14px;
    }

    /* --- Input --- */
    .input-area {
        bottom: var(--space-sm);
        bottom: calc(var(--space-sm) + env(safe-area-inset-bottom, 0px));
        width: calc(100% - var(--space-sm) * 2);
    }

    .input-pill {
        padding: var(--space-xs) var(--space-sm) !important;
        border-radius: 22px !important;
    }

    .message-input {
        font-size: 16px !important;
        /* Must be ≥16px to prevent iOS auto-zoom on focus */
    }

    .send-button {
        width: 30px;
        height: 30px;
    }

    .send-button svg {
        width: 16px;
        height: 16px;
    }

    /* --- Typing Indicator --- */
    .typing-indicator {
        bottom: calc(var(--space-sm) + 60px);
        padding: var(--space-sm) var(--space-md);
    }

    .thinking-label {
        font-size: 0.75rem;
    }

    .thinking-dots span {
        width: 8px;
        height: 8px;
    }

    /* --- User Greeting --- */
    .user-greeting {
        top: 0.5rem;
        right: 0.5rem;
        padding: 0.3rem 0.55rem;
        gap: 0.3rem;
        max-width: 55%;
    }

    .user-greeting-text {
        font-size: 0.65rem;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .user-name {
        max-width: 10ch;
        display: inline-block;
        overflow: hidden;
        text-overflow: ellipsis;
        vertical-align: bottom;
    }

    .sign-out-btn {
        width: 22px;
        height: 22px;
    }

    .sign-out-btn svg {
        width: 12px;
        height: 12px;
    }

    /* --- Top Left Actions --- */
    .top-left-actions {
        top: 0.5rem;
        left: 0.5rem;
        flex-direction: row !important;
        gap: 0.3rem;
    }

    .feedback-btn {
        padding: 0.3rem 0.55rem;
        font-size: 0.65rem;
        gap: 0.3rem;
    }

    .feedback-btn svg {
        width: 11px;
        height: 11px;
    }

    .share-chat-btn {
        padding: 0.3rem 0.55rem;
        font-size: 0.65rem;
        gap: 0.3rem;
    }

    .share-chat-btn svg {
        width: 11px;
        height: 11px;
    }

    /* --- Message Action Buttons: icon-only --- */
    .msg-action-btn {
        padding: 3px 5px;
        font-size: 0.6rem;
        gap: 2px;
    }

    .msg-action-label {
        display: none;
    }

    .msg-action-icon svg {
        width: 14px;
        height: 14px;
    }

    /* --- Share Chat Menu: bottom sheet --- */
    .share-chat-menu {
        max-width: 100%;
        border-radius: 18px 18px 0 0;
    }

    .share-chat-menu-header {
        padding: 1rem 1rem 0.5rem;
    }

    .share-chat-menu-header h3 {
        font-size: 0.95rem;
    }

    .share-chat-menu-body {
        padding: 0.4rem 0.5rem 0.75rem;
    }

    .share-chat-option {
        padding: 0.7rem 0.6rem;
        gap: 0.65rem;
    }

    .share-chat-option-icon {
        width: 34px;
        height: 34px;
        border-radius: 10px;
    }

    .share-chat-option-title {
        font-size: 0.82rem;
    }

    .share-chat-option-desc {
        font-size: 0.7rem;
    }

    /* --- Quote Popup --- */
    .quote-popup-content {
        max-width: calc(100% - 1.5rem);
        padding: 1rem;
    }

    .quote-popup-text {
        font-size: 0.82rem;
        padding: 0.6rem 0.75rem;
        max-height: 150px;
    }

    .quote-popup-btn {
        padding: 0.5rem 0.6rem;
        font-size: 0.75rem;
        border-radius: 10px;
        gap: 0.3rem;
    }

    /* --- Intro Text --- */
    .intro-text {
        font-size: 0.85rem;
        padding: 0 var(--space-md);
    }

    /* --- Feedback Modal --- */
    .feedback-modal {
        padding: 24px;
        border-radius: 16px;
        max-width: calc(100% - 16px);
    }

    .feedback-modal-title {
        font-size: var(--font-size-lg);
    }

    .feedback-field input,
    .feedback-field textarea {
        padding: 10px 14px;
        font-size: 16px;
        /* Prevent iOS auto-zoom */
        -webkit-appearance: none;
        appearance: none;
        border-radius: 8px;
    }

    .feedback-submit-btn {
        padding: 12px 20px;
        touch-action: manipulation;
    }
}


/* ============================================
   3. SMALL PHONE (≤ 380px)
   ============================================ */

@media (max-width: 380px) {

    .user-greeting {
        padding: 0.25rem 0.45rem;
        gap: 0.25rem;
    }

    .user-greeting-text {
        font-size: 0.6rem;
    }

    .user-name {
        max-width: 7ch;
    }

    .sign-out-btn {
        width: 20px;
        height: 20px;
    }

    .top-left-actions {
        flex-direction: row !important;
        gap: 0.2rem;
    }

    .feedback-btn {
        padding: 0.25rem 0.45rem;
        font-size: 0.6rem;
    }

    .share-chat-btn {
        padding: 0.25rem 0.45rem;
        font-size: 0.6rem;
    }
}