/* ========================================
   Button Component Base Styles
   ======================================== */

.btn-base {
    border: none;
    cursor: pointer;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-weight: 500;
    transition: opacity 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
    outline: none;
}

.btn-base:hover {
    opacity: 0.8;
}

.btn-base:active {
    opacity: 0.6;
}

/* ========================================
   Size Templates
   ======================================== */

.btn-size-icon {
    background: transparent;
    border: none;
    font-size: 20px;
    font-weight: 400;
    padding: 0;
}

.btn-size-dot-menu {
    background: transparent;
    border: none;
    font-size: 18px;
    font-weight: 400;
    padding: 4px;
    line-height: 1;
    letter-spacing: 0;
    border-radius: 4px;
    transition: background 0.2s;
}

.btn-size-dot-menu:hover {
    background: var(--interactive-hover) !important;
    opacity: 1 !important;
}

.btn-size-dot-menu-small {
    background: transparent;
    border: none;
    font-size: 14px;
    font-weight: 400;
    padding: 4px;
    line-height: 1;
    letter-spacing: 0;
    border-radius: 4px;
    transition: background 0.2s;
}

.btn-size-dot-menu-small:hover {
    background: var(--interactive-hover) !important;
    opacity: 1 !important;
}

.btn-size-small {
    width: 28px;
    height: 28px;
    font-size: 18px;
    border-radius: 4px;
    padding: 0;
}

.btn-size-medium {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 6px;
}

.btn-size-large {
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 8px;
}

/* ========================================
   Color + Variant Templates
   ======================================== */

/* Blue Solid */
.btn-color-blue.btn-variant-solid {
    background: var(--blue-primary);
    color: var(--text-inverse);
}

.btn-color-blue.btn-variant-solid:hover {
    background: var(--blue-hover);
    opacity: 1;
}

/* Blue Transparent */
.btn-color-blue.btn-variant-transparent {
    background: transparent;
    color: var(--blue-primary);
}

/* Icon and dot-menu size always use transparent with color only */
.btn-size-icon.btn-color-blue,
.btn-size-dot-menu.btn-color-blue,
.btn-size-dot-menu-small.btn-color-blue {
    color: var(--blue-primary);
}

/* Blue Outline */
.btn-color-blue.btn-variant-outline {
    background: transparent;
    color: var(--blue-primary);
    border: 1px solid var(--blue-primary);
}

/* Red Solid */
.btn-color-red.btn-variant-solid {
    background: var(--red-primary);
    color: var(--text-inverse);
}

.btn-color-red.btn-variant-solid:hover {
    background: var(--red-hover);
    opacity: 1;
}

/* Red Transparent */
.btn-color-red.btn-variant-transparent {
    background: transparent;
    color: var(--red-primary);
}

/* Icon and dot-menu size always use transparent with color only */
.btn-size-icon.btn-color-red,
.btn-size-dot-menu.btn-color-red,
.btn-size-dot-menu-small.btn-color-red {
    color: var(--red-primary);
}

/* Red Outline */
.btn-color-red.btn-variant-outline {
    background: transparent;
    color: var(--red-primary);
    border: 1px solid var(--red-primary);
}

/* Gray Solid */
.btn-color-gray.btn-variant-solid {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-color-gray.btn-variant-solid:hover {
    background: var(--border-strong);
    opacity: 1;
}

/* Gray Transparent */
.btn-color-gray.btn-variant-transparent {
    background: transparent;
    color: var(--text-secondary);
}

/* Gray Outline */
.btn-color-gray.btn-variant-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-default);
}

/* Green Solid */
.btn-color-green.btn-variant-solid {
    background: var(--green-primary);
    color: var(--text-inverse);
}

.btn-color-green.btn-variant-solid:hover {
    background: var(--green-hover);
    opacity: 1;
}

/* Green Transparent */
.btn-color-green.btn-variant-transparent {
    background: transparent;
    color: var(--green-primary);
}

/* Green Outline */
.btn-color-green.btn-variant-outline {
    background: transparent;
    color: var(--green-primary);
    border: 1px solid var(--green-primary);
}

/* ========================================
   Chevron Arrow
   ======================================== */

.btn-chevron {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    transition: transform 0.2s;
    color: var(--text-secondary);
    flex-shrink: 0;
}

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

/* Expanded state: rotate to point down */
.btn-chevron-expanded {
    transform: rotate(90deg);
}