/* =====================================================================
   Notion Chat — Components (mirrors design.md component specs)
   ===================================================================== */

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-sans);
    font-size: var(--fs-button);
    font-weight: 500;
    line-height: var(--lh-button);
    cursor: pointer;
    border: 1px solid transparent;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    transition: background-color .15s ease, transform .08s ease, box-shadow .15s ease;
    user-select: none;
    white-space: nowrap;
    text-decoration: none;
}
.btn:active { transform: scale(0.9); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
}
.btn-primary:hover { background: var(--color-primary-active); text-decoration: none; }
.btn-primary:active { background: var(--color-primary-active); }

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-ink);
    box-shadow: var(--shadow-1);
    border-color: transparent;
}
.btn-secondary:hover { background: #fbfbfa; text-decoration: none; }

.btn-utility {
    background: var(--color-surface);
    color: var(--color-ink);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-md);
    padding: 4px 14px;
    box-shadow: none;
}
.btn-utility:hover { background: #fbfbfa; text-decoration: none; }
.btn-utility:active { transform: scale(0.97); }

.btn-ghost {
    background: transparent;
    color: var(--color-ink-secondary);
    border-radius: var(--radius-md);
    padding: 6px 12px;
}
.btn-ghost:hover { background: rgba(0,0,0,0.04); color: var(--color-ink); text-decoration: none; }

.btn-block { width: 100%; }
.btn-sm    { padding: 6px 14px; font-size: var(--fs-caption); }

/* ---- Icon button (circular media control) ---- */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: var(--radius-full);
    background: rgba(0,0,0,0.05);
    color: var(--color-ink);
    border: none;
    cursor: pointer;
    transition: transform .08s ease, background-color .15s ease;
}
.btn-icon:hover { background: rgba(0,0,0,0.08); }
.btn-icon:active { transform: scale(0.9); }

/* ---- Forms ---- */
.field { margin-bottom: var(--space-md); }
.field__label {
    display: block;
    font-size: var(--fs-eyebrow);
    font-weight: 600;
    letter-spacing: var(--ls-eyebrow);
    color: var(--color-ink-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
}
.text-input, .textarea, select.text-input {
    width: 100%;
    background: var(--color-surface);
    color: var(--color-ink);
    font-size: var(--fs-body-sm);
    border: 1px solid #dddddd;
    border-radius: var(--radius-xs);
    padding: 8px 10px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
.text-input:focus, .textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-1);
}
.field__hint  { font-size: var(--fs-caption); color: var(--color-ink-muted); margin-top: var(--space-xxs); }
.field__error { font-size: var(--fs-caption); color: var(--color-accent-orange); margin-top: var(--space-xxs); font-weight: 500; }

/* ---- Cards ---- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}
.card-elevated {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-1);
    border: 1px solid var(--color-hairline);
}

/* ---- Badge / eyebrow pill ---- */
.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xxs);
    background: var(--color-surface);
    color: var(--color-primary);
    font-size: var(--fs-eyebrow);
    font-weight: 600;
    letter-spacing: var(--ls-eyebrow);
    padding: 4px 8px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-hairline);
}

/* ---- Avatar ---- */
.avatar {
    --av-size: 36px;
    --av-color: var(--color-primary);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--av-size);
    height: var(--av-size);
    border-radius: var(--radius-full);
    background: var(--av-color);
    color: #fff;
    font-size: calc(var(--av-size) * 0.38);
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1;
    overflow: hidden;
    flex-shrink: 0;
    user-select: none;
}
.avatar img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.avatar__initials { position: relative; z-index: 1; }
.avatar__status {
    position: absolute;
    right: 0; bottom: 0;
    width: calc(var(--av-size) * 0.32);
    height: calc(var(--av-size) * 0.32);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-surface);
}
.avatar__status--online  { background: var(--accent-green); }
.avatar__status--away    { background: var(--accent-orange); }
.avatar__status--offline { background: var(--color-ink-faint); }

/* ---- Toast ---- */
.toast-stack {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    z-index: 1000;
    pointer-events: none;
}
.toast {
    background: var(--color-surface);
    color: var(--color-ink);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow-1);
    border: 1px solid var(--color-hairline);
    font-size: var(--fs-caption);
    pointer-events: auto;
    animation: toast-in .25s ease;
    max-width: 360px;
}
@keyframes toast-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---- Modal ---- */
.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(15,15,15,0.4);
    backdrop-filter: blur(2px);
    display: flex; align-items: center; justify-content: center;
    z-index: 900;
    padding: var(--space-lg);
    animation: fade-in .15s ease;
}
@keyframes fade-in { from { opacity: 0 } to { opacity: 1 } }
.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
    width: 100%; max-width: 480px;
    padding: var(--space-lg);
    animation: modal-in .2s ease;
}
.modal--wide { max-width: 640px; }
@keyframes modal-in {
    from { opacity: 0; transform: translateY(12px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal__header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: var(--space-md);
}
.modal__title { font-size: var(--fs-heading-3); font-weight: 700; letter-spacing: var(--ls-heading-3); }
.modal__close {
    background: none; border: none; cursor: pointer;
    color: var(--color-ink-muted);
    width: 32px; height: 32px;
    border-radius: var(--radius-md);
    display: inline-flex; align-items: center; justify-content: center;
}
.modal__close:hover { background: rgba(0,0,0,0.05); color: var(--color-ink); }